Usefulness of histological superstudy of sentinel lymph nodes detected with radioisotopes in colon cancer.

INTRODUCTION: Adjuvant chemotherapy (CT) significally reduces the rate of relapse in +pN (stage III) colon cancer (CC) and in some pN0 (stage II) with risk factors such as pT4, vascular invasion V1, perineural invasion Pn1, and complicated tumors. However, unexpectedly, 20%-30% of pN0 present a relapse in the follow-up, which may suggest that the lymph node involvement was not discovered in the conventional histological study (CS), and its finding with a superstudy (SS) could increase the number of patients who would benefit from neoadjuvant CT. It is not possible to perform this SS in every lymph node (LN) from the specimen, but it is possible in a small group of LN which are representative of the N status (definition of sentinel node SN). The aim of our work is to state the representativeness of the SN and to analyze de number of patients who are suprastaged after the SS of the SN. MATERIAL AND METHODS: Prospective study of a series of patients who have undergone curative surgery for CC, to whom we perform selective biopsy of sentinel node (SBDN). Identification of SN was carried out with in vivo injection of the radiotracer, with ex vivo isolation of SN. Once the specimen is out, we take pictures of the surgical bed to rule out the presence of aberrant drainage routes, out of the routine oncological resection area. We performed the histological CS (Hematoxilin-Eosin stain (H-E) in conventional sections) in the rest of the LN from the mesocolon. In the SN we performed the CS and a SS with H-E in serial sections, immunohistochemistry (IHC) and molecular study with OSNA® (One Step Nucleic Acid Amplification). Diagnostic validity study od SBSN was carried out, defining the false negative (FN) as the negativity of the SN while other LN are positive (N+), as well as a valuation of the suprastaging due to the SS of the SN. RESULTS: We performed lymphatic map in 72 patients, finding the SN in 62 of them (87.3%). The 9 identification failures happened in the first 17 cases. We have not found aberrant drainage routes. A total of 1.164 LN were studied in the 62 patients (18.8 LN/patient), from which 145 are SN (2,34 SN/patient), having found 103 positive LN with the CS and 112 positive with the SS of SN (9+ LN more in 8 patients than detected with the CS). Positivity after CS in the SN group is 17.24% (25/145), while it is 8.53% in the rest (87/1.019) (P < .001). With the CS, 50% of the patients (31/62) were pN+ (4 are N+ exclusively in the SN), and after the SS of the SN, only 1 of the 31 pN0 patients (3.2%) becomes pN1a, with a definitive 51.6% of N+ in the whole series (32 N+ in the 62 patients) (5 are N+ exclusively in the SN). Exclusively with the SS of the SN, FN rate ("-SN, +others", meaning patients who are N+ having -SN) is 54.8% (17/31). With the SS of the SN, 8 of the 62 patients (12.9%) increase their total number of +LN: apart from the patient who turns from pN0 to pN1a, suprastaging from IIA to IIIB (and therefore increasing the total number of pN+ to 32), 5 of the 17 FN in the CS turns into positive (2 change the pN subindex and one is suprastaged from IIIB to IIIC), decreasing FN to 37.5% (12/32 cases). Besides, 2 patients whose SN is already positive in the CS increase the number of +SN after the SS of the SN, therefore both changing their pN subindex and one of them suprastaging from IIIB to IIIC. In summary, 8 patients increase the total number of positive SN after the SS (8/62, 12.9%), 5 of them changing the pN subindex (5/62, 12.9%), even if only 3 of them get suprastaged (3/62, 4.8%), among them the one who turns from pN0 to pN1a. CONCLUSION: Technique is valid and reproducible, with a high detection rate even with a high learning curve. It globally increases the number of affected LN in 12.9% of patients, having prognostic implications in 4.8% (suprastaging rate). Only 3.2% of pN0 patients in the CS turn to be +pN after the SS of the SN, with its therapeutic implications (prescription of adjuvant CT), which could be relevant when extrapolated to a big number of patients. The high FN rate (37.5%) prevents us from accepting the representativeness of SN as the global N status, but it is not clinically relevant in CC, as its aim is not to avoid lymphadenectomy, which remains mandatory (opposite to breast cancer or melanoma in which SN detection decides upon whether to perform or not the lymphadenectomy), but to decide which patients would benefit from adjuvant CT.

Adequacy of antibiotic prophylaxis and incidence of surgical site infections in neck surgery.

Health care-related infections are frequent and among them surgical site infection (SSI) are the most frequent in hospitals. The objective was to evaluate the adequacy of antibiotic prophylaxis in patients undergoing neck surgery and its relationship with the incidence of surgical site infection (SSI). Prospective cohort study. The adequacy of antibiotic prophylaxis in patients undergoing neck surgery was evaluated. Antibiotic prophylaxis was considered adequate when it conformed to all items of the protocol (antibiotic used, time of administration, administration route, dose and duration). The cumulative incidence of SSI was calculated, and the relationship between SSI and antibiotic prophylaxis adequacy was determined using adjusted relative risk (RR). Antibiotic prophylaxis was administered in 63 patients and was adequate in 85.7% (95% CI 75.0-92.3) of them. The cumulative incidence of SSI was 6.4% (95% CI 3.4-11.8). There was no significant relationship between antibiotic prophylaxis inadequacy and the incidence of SSI (RR = 2.4, 95% CI 0.6-10.6). Adequacy of antibiotic prophylaxis was high and it did not affect the incidence of SSIs.

Usefulness of histological superstudy of sentinel node detected with radioisotope in colon cancer. / Utilidad del superestudio anatomopatológico de ganglio centinela detectado con radioisótopos en el cáncer de colon.

INTRODUCTION: Adjuvant chemotherapy (CT) significally reduces the rate of relapse in +pN (stage III) colon cancer and in some pN0 (stage II) with risk factors such as pT4, vascular invasion V1, perineural invasion Pn1, and complicated tumors. However, unexpectedly, 20-30% of pN0 present a relapse in the follow-up, which may suggest that the lymph node involvement was not discovered in the conventional histological study (CS), and its finding with a superstudy (SS) could increase the number of patients who would benefit from neoadjuvant CT. It is not possible to perform this SS in every lymph node (LN) from the specimen, but it is possible in a small group of LN which are representative of the N status (definition of sentinel node SN). The aim of our work is to state the representativeness of the SN and to analyze de number of patients who are suprastaged after the SS of the SN. MATERIAL AND METHODS: Prospective study of a series of patients who have undergone curative surgery for colon cancer, to whom we perform selective biopsy of sentinel node. Identification of SN was carried out with in vivo injection of the radiotracer, with ex vivo isolation of SN. Once the specimen is out, we take pictures of the surgical bed to rule out the presence of aberrant drainage routes, out of the routine oncological resection area. We performed the histological CS (hematoxilin-eosin stain in conventional sections) in the rest of the LN from the mesocolon. In the SN we performed the CS and a SS with hematoxilin-eosin in serial sections, immunohistochemistry (IHC) and molecular study with One Step Nucleic Acid Amplification (OSNA®). Diagnostic validity study od selective biopsy of sentinel node was carried out, defining the false negative (FN) as the negativity of the SN while other LN are positive (N+), as well as a valuation of the suprastaging due to the SS of the SN. RESULTS: We performed lymphatic map in 72 patients, finding the SN in 62 of them (87.3%). The 9 identification failures happened in the first 17 cases. We have not found aberrant drainage routes. A total of 1.164 LN were studied in the 62 patients (18.8 LN/ patient), from which 145 are SN (2,34 SN/ patient), having found 103 positive LN with the CS and 112 positive with the SS of SN (9 +LN more in 8 patients than detected with the CS). Positivity after CS in the SN group is 17.24% (25/145), while it is 8.53% in the rest (87/1.019) (p<.001). With the CS, 50% of the patients (31/62) were pN+ (4 are N+ exclusively in the SN), and after the SS of the SN, only 1 of the 31 pN0 patients (3.2%) becomes pN1a, with a definitive 51.6% of N+ in the whole series (32 N+ in the 62 patients) (5 are N+ exclusively in the SN). Exclusively with the SS of the SN, FN rate ("-SN, +others", meaning patients who are N+ having -SN) is 54.8% (17/31). With the SS of the SN, 8 of the 62 patients (12.9%) increase their total number of +LN: apart from the patient who turns from pN0 to pN1a, suprastaging from IIA to IIIB (and therefore increasing the total number of pN+ to 32), 5 of the 17 FN in the CS turns into positive (2 change the pN subindex and one is suprastaged from IIIB to IIIC), decreasing FN to 37.5% (12/32 cases). Besides, 2 patients whose SN is already positive in the CS increase the number of +SN after the SS of the SN, therefore both changing their pN subindex and one of them suprastaging from IIIB to IIIC. In summary, 8 patients increase the total number of positive SN after the SS (8/62, 12.9%), 5 of them changing the pN subindex (5/62, 12.9%), even if only 3 of them get suprastaged (3/62, 4.8%), among them the one who turns from pN0 to pN1a. CONCLUSION: Technique is valid and reproducible, with a high detection rate even with a high learning curve. It globally increases the number of affected LN in 12.9% of patients, having prognostic implications in 4.8% (suprastaging rate). Only 3.2% of pN0 patients in the CS turn to be +pN after the SS of the SN, with its therapeutic implications (prescription of adjuvant CT), which could be relevant when extrapolated to a big number of patients. The high FN rate (37.5%) prevents us from accepting the representativeness of SN as the global N status, but it is not clinically relevant in colon cancer, as its aim is not to avoid lymphadenectomy, which remains mandatory (opposite to breast cancer or melanoma in which SN detection decides upon whether to perform or not the lymphadenectomy), but to decide which patients would benefit from adjuvant CT.

[Evaluation of compliance with the antibiotic prophylaxis protocol in hysterectomy. Prospective cohort study]. / Evaluación de la adecuación al protocolo de profilaxis antibiótica en histerectomías. Estudio de cohortes prospectivo.

OBJECTIVE: Health care-related infections are a public health problem, among them surgical site infection (SSI) are the most frequent in hospitals. The objetive of this study was to assess the effect of the compliance to antibiotic prophylaxis protocol on the incidence of surgical site infection in hysterectomized patients. METHODS: A prospective cohort study was carried out between October 2009 and December 2018. The incidence of SSI was studied after a maximum period of 30 days from the moment of surgery. The degree of adequacy of antibiotic prophylaxis in hysterectomy and the effect of its inadequacy on the incidence of infection was evaluated using relative risk (RR) adjusted with a logistic regression model. RESULTS: A total of 1,025 interventions were studied in 1,022 women. The cumulative incidence of SSI was 2,1% (n = 22). The most frequent etiology of infection was Escherichia coli (23.1%) and Proteus mirabilis (23.1%). Antibiotic prophylaxis was indicated in 1,014 interventions (98.9%) being administered in 1,009 of them (99.5%). The adherence to the protocol was 92,5%. The main cause of non-compliance was the time of onset (40.9%), followed by the choice of the antibiotic (35.2%). The effect of inadequate prophylaxis on the incidence of infection was RR = 0.9; 95% CI 0.2-3.9; p> 0.05. CONCLUSIONS: The adequacy of antibiotic prophylaxis was very high, with a low incidence of surgical site infection. No association was found between adequacy of prophylaxis and incidence of infection in hysterectomy. The continuous improvement of epidemiological surveillance in gynecology should be emphasized.

[Clinical and pathophysiological description of nummular headaches: a case series]. / Descripción clínica y fisiopatológica de la cefalea numular: serie de casos.

INTRODUCTION: Nummular headache was initially described as an infrequent primary headache characterised by chronic circumscribed mild-to-moderate pain in a small area of the head that may present with exacerbations. Since its initial description, dozens of cases of nummular headache have been reported which broaden the clinical and pathophysiological spectrum. AIMS: To review and establish the clinical characteristics of nummular headache, to analyse the epidemiology in our setting and to clarify some unanswered pathophysiological issues. PATIENTS AND METHODS: The study involved 83 cases (42 women and 41 men) who were diagnosed with nummular headache from July 2008 and followed up until 2018 at the Fundacion Alcorcon Hospital. The mean age of onset was 46 years. The time to diagnosis was seven months. RESULTS: The pain was moderate-intense and oppressive, with exacerbations in 62.5% of cases. The average size of the symptomatic area was 2.4 ± 0.7 cm, with a parietal (47%), temporal (24%), frontal (12%) or occipital (6%) location. It presented a chronic (82%) or episodic (18%) pattern. Symptoms of local sensory dysfunction were observed in 25 patients and three others showed skin alterations. Spontaneous remission was observed in 36% of cases, and the most commonly used drugs were non-steroidal anti-inflammatory drugs, paracetamol and gabapentin. Botulinum toxin was effective. CONCLUSIONS: Nummular headache is a disorder with well-defined characteristics and is considered an entity in its own right. Our data indicate that its origin lies in the epicranial structures. The conjunction of pain, sensory dysfunction and trophic disorders suggests a local form of a complex regional syndrome.

TITLE: Descripción clínica y fisiopatológica de la cefalea numular: serie de casos.Introducción. La cefalea numular se describió inicialmente como una cefalea primaria infrecuente caracterizada por dolor circunscrito crónico en una pequeña área craneal, de intensidad leve-moderada y que puede presentar exacerbaciones. Desde su descripción inicial se han publicado decenas de casos de cefalea numular que amplían el espectro clínico y fisiopatológico. Objetivos. Revisar y establecer las características clínicas de la cefalea numular, analizar la epidemiología en nuestro medio y aclarar incógnitas fisiopatológicas. Pacientes y métodos. Se estudiaron 83 casos (42 mujeres y 41 varones), que fueron diagnosticados de cefalea numular desde julio de 2003 a julio de 2008, y seguidos hasta 2018 en el Hospital Universitario Fundación Alcorcón. La edad media de inicio fue de 46 años. El tiempo de evolución hasta el diagnóstico fue de siete meses. Resultados. El dolor fue moderado-intenso y opresivo, con exacerbaciones en el 62,5% de los casos. El tamaño medio del área sintomática fue de 2,4 ± 0,7 cm, con una localización parietal (47%), temporal (24%), frontal (12%) u occipital (6%). Presentó un patrón crónico (82%) o episódico (18%). Mostraron síntomas de disfunción sensitiva local 25 pacientes, y otros tres, cambios en la piel. La remisión espontánea se observó en el 36% de los casos, y los fármacos más utilizados fueron los antiinflamatorios no esteroideos, el paracetamol y la gabapentina. La toxina botulínica fue eficaz. Conclusiones. La cefalea numular es un trastorno con características bien definidas y con entidad propia. Nuestros datos indican que su origen está en las estructuras epicraneales. La conjunción de dolor, disfunción sensitiva y alteraciones tróficas indica una forma local de síndrome regional complejo.

Evaluación de la adecuación al protocolo de profilaxis antibiótica en cirugía de mama y su efecto sobre la incidencia de infección quirúrgica / Evaluation of compliance with the antibiotic prophylaxis protocol in breast surgery and its effect on the incidence of surgical infection

Fundamento: La profilaxis antibiótica es una de las formas más eficaces de evitar la infección de sitio quirúrgico (ISQ). En este estudio se evalúan el cumplimiento del protocolo de profilaxis antibiótica y el efecto de su inadecuación en la incidencia de ISQ en cirugía de mama. Material y métodos: Estudio prospectivo de cohortes realizado entre julio de 2008 y julio de 2018. Se evaluaron el grado de cumplimiento de la profilaxis antibiótica en cirugía de mama y las causas de no cumplimiento: elección del antibiótico, vía de administración, tiempo de inicio, dosis y duración. Se estudió la incidencia de ISQ durante los 30 días posteriores a la intervención (90 en caso de implantes o prótesis). Para evaluar el efecto de la inadecuación de la profilaxis se utilizó el riesgo relativo (RR). Resultados: Se estudiaron 1.328 intervenciones en 1.212 mujeres. La incidencia acumulada de ISQ fue del 1,7% (n=22) y la etiología más frecuente Staphylococcus aureus (47,1%). El cumplimiento global del protocolo de profilaxis antibiótica fue del 95,3% (incluyendo las 568 cirugías donde no estaba indicada). Las causas principales de no cumplimiento fueron el tiempo de inicio (46,8%) y la elección del antibiótico (40,3%). La inadecuación aumentó significativamente la incidencia de ISQ (8,1 vs 1,3%, p=0,003) y el riesgo de sufrirla (RR=6,5; IC95% 2,3-18,1). Conclusiones: La tasa global de adecuación al protocolo fue muy alta. La inadecuación de la profilaxis antibiótica duplicó, al menos, el riesgo de sufrir ISQ en cirugía de mama

Background: Antibiotic prophylaxis is one of the most effective ways to avoid surgical site infection (SSI). The present study evaluates compliance with the antibiotic prophylaxis protocol and the effect of non-compliance on the incidence of SSI in breast surgery. Methods: A prospective cohort study was carried out from July 2008 to July 2018. It assessed the degree of compliance with antibiotic prophylaxis in breast surgery and the causes of non-compliance: choice of antibiotic, route of administration, time of onset, dose and duration. The incidence of SSI was studied during the 30 days after intervention (90 in the case of implants or prostheses). Relative risk (RR) was used to assess the effect of inadequate prophylaxis. Results: We studied 1,328 interventions in 1,212 women. The cumulative incidence of SSI was 1.7% (n=22) and the most common etiology was Staphylococcus aureus (47.1%). Overall antibiotic prophylaxis protocol compliance was 95.3%, (including the 568 interventions where it was not indicated). The principle causes of non-compliance were the time of onset (46.8%) and choice of antibiotic (40.3%). Non-compliance significantly increased both incidence of SSI (8.1 vs 1.3%, p=0,003) and its risk (RR=6.5, CI95% 2.3-18.1). Conclusions: The overall protocol compliance rate was very high. Non-compliance with prophylaxis protocol at least doubled the risk of SSI in breast surgery

[Evaluation of compliance with the antibiotic prophylaxis protocol in breast surgery and its effect on the incidence of surgical infection]. / Evaluación de la adecuación al protocolo de profilaxis antibiótica en cirugía de mama y su efecto sobre la incidencia de infección quirúrgica.

BACKGROUND: Antibiotic prophylaxis is one of the most effective ways to avoid surgical site infection (SSI). The present study evaluates compliance with the antibiotic prophylaxis protocol and the effect of non-compliance on the incidence of SSI in breast surgery. METHODS: A prospective cohort study was carried out from July 2008 to July 2018. It assessed the degree of compliance with antibiotic prophylaxis in breast surgery and the causes of non-compliance: choice of antibiotic, route of administration, time of onset, dose and duration. The incidence of SSI was studied during the 30 days after intervention (90 in the case of implants or prostheses). Relative risk (RR) was used to assess the effect of inadequate prophylaxis. RESULTS: We studied 1,328 interventions in 1,212 women. The cumulative incidence of SSI was 1.7% (n=22) and the most common etiology was Staphylococcus aureus (47.1%). Overall antibiotic prophylaxis protocol compliance was 95.3%, (including the 568 interventions where it was not indicated). The principle causes of non-compliance were the time of onset (46.8%) and choice of antibiotic (40.3%). Non-compliance significantly increased both incidence of SSI (8.1 vs 1.3%, p=0,003) and its risk (RR=6.5, CI95% 2.3-18.1). CONCLUSIONS: The overall protocol compliance rate was very high. Non-compliance with prophylaxis protocol at least doubled the risk of SSI in breast surgery.

[Hand hygiene compliance with hydroalcoholic solutions in medical students. Cross-sectional study]. / Adherencia a la higiene de manos con soluciones hidroalcohólicas en estudiantes de medicina. Estudio descriptivo transversal.

OBJECTIVE: To assess hand hygiene compliance covertly in medical students in a university teaching hospital. METHODS: Cross-sectional study. Hand hygiene compliance in medical students was assessed in the units of Neonatology, Paediatrics, Neurology and Orthopaedic surgery. The five moments were covertly observed so as the hand rub technique. Hand hygiene compliance was described with the compliance percentages of the five moments. RESULTS: We studied 456 opportunities of hand hygiene. Global compliance was 44.3%. The most registered unit was Orthopaedic surgery (59.6%). According to the different moments, global compliance was better "after touching a patient" (60.2%). The unit with the highest hand hygiene compliance was Neonatology (60%). Hand hygiene compliance was better in the different hospitalisation units (50%) than in the office rooms (33%) (P<0.05) and the mean duration of hand hygiene was 22 seconds. CONCLUSIONS: Most of the moments were registered in the unit of Orthopaedic surgery and the moment with the highest hand hygiene compliance was "after touching a patient". The most hand hygiene compliance percentage was observed in Neonatology. Hand hygiene compliance was moderate, and it could and must be improved.

[Presurgical preparation and surgical site infection in neck surgery. The effect of the protocol adequacy in the improvement of the health care quality]. / Impacto de la adecuación del protocolo de preparación prequirúrgica en la incidencia de infección de localización quirúrgica en cirugía cervical.

BACKGROUND: Surgical wound infection is one of the leading causes of healthcare-associated infections. One of the most common measures for its reduction is the pre-surgical preparation. The aim of this study was to evaluate the adequacy to the pre-surgical protocol in patients undergoing neck surgery and the relationship with the incidence of surgical wound infection. MATERIAL AND METHODS: Observational cohort study, conducted from January 2011 to December 2017. Variables related to patient, pre-surgical preparation and infection were collected. Infection rate was calculated after a maximum period of 30days after surgery. The effect of the pre-surgical preparation's adequacy and infection was evaluated. RESULTS: The study included 131 patients. The global adequacy of the pre-surgical protocol was 84.7%, being the main cause of inadequacy the application of the mouthwash (7.6% of the interventions). The overall incidence of surgical wound infection during the follow-up period was 4.6% (95%CI: 1.0%-8.2%). No relationship between the adequacy to the protocol and the presence of infection was found (P=.59). CONCLUSIONS: Adequacy of the pre-surgical preparation in our hospital was high and the incidence of surgical wound infection was low, and no relationship was found between the two. The results show a high safety culture in this surgery. However, there is still room for improvement in the quality of care of our patients.

Incidence of surgical wound infection in renal surgery. The effect of antibiotic prophylaxis appropriateness. A prospective cohort study. / Incidencia de infección de herida quirúrgica en cirugía renal. Efecto de la adecuación de la profilaxis antibiótica. Estudio de cohortes prospectivo.

OBJECTIVE: To assess compliance with the antibiotic prophylaxis protocol for patients who underwent renal surgery and its effect on the incidence of surgical wound infection. MATERIAL AND METHODS: We performed a prospective cohort study and assessed the overall compliance and each aspect of the antibiotic prophylaxis (start, administration route, antibiotic of choice, duration and dosage) and reported the compliance rates. The qualitative variables were compared with the chi-squared test, and the quantitative variables were compared with Student's t-test. We studied the effect of antibiotic prophylaxis compliance on the incidence of surgical wound infection in renal surgery, with the relative risk. RESULTS: The study included 266 patients, with an overall compliance rate of 90.6%. The major cause of noncompliance (3.8%) was the start of the prophylaxis, and the incidence rate of surgical wound infections was 3.4%. We found no relationship between antibiotic prophylaxis noncompliance and surgical wound infections (RR=0.26; 95%CI: 0.1-1.2; P>.05). Laparoscopic surgery had a lower incidence of surgical wound infections than open surgery (RR=0.10; 95%CI: 0.01-0.79). CONCLUSIONS: The antibiotic prophylaxis compliance was high. The incidence of surgical site infection was low, and there was no relationship between the incidence of surgical site infection and antibiotic prophylaxis compliance. The incidence of infection was lower in laparoscopic surgery.

Réplica: Infección de localización quirúrgica en cirugía de colon / Reply: Surgical site infection in colon surgery

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Incidencia de infección de herida quirúrgica en cirugía renal. Efecto de la adecuación de la profilaxis antibiótica. Estudio de cohortes prospectivo / Incidence of surgical wound infection in renal surgery. The effect of antibiotic prophylaxis appropriateness. A prospective cohort study

Objetivo: Evaluar la adecuación a protocolo de la profilaxis antibiótica en pacientes intervenidos de cirugía renal y su efecto en la incidencia de infección de localización quirúrgica. Material y métodos: Se realizó un estudio prospectivo de cohortes. Se evaluó la adecuación global y de cada apartado de la profilaxis antibiótica (inicio, vía de administración, antibiótico de elección, duración y dosis). Se describieron los porcentajes de adecuación. Las variables cualitativas se han comparado con la prueba Chi2 y las cuantitativas con la prueba t-Student. Se ha estudiado el efecto de la adecuación de la profilaxis antibiótica, en la incidencia de infección de localización quirúrgica en la cirugía renal, con el riesgo relativo. Resultados: Se incluyeron 266 pacientes en el estudio. La adecuación global fue del 90,6%. La mayor causa de inadecuación fue el inicio de la profilaxis, con un 3,8%. La incidencia de infección de localización quirúrgica fue del 3,4%. No se encontró relación entre la inadecuación de la profilaxis antibiótica y la infección de localización quirúrgica (RR = 0,26; IC 95%: 0,1-1,2; p > 0,05). La cirugía laparoscópica tuvo menor incidencia de infección de localización quirúrgica que la cirugía abierta (RR = 0,10; IC 95%: 0,01-0,79). Conclusiones: La adecuación de la profilaxis antibiótica fue alta. La incidencia de infección de localización quirúrgica fue baja y no hubo relación entre la incidencia de infección de localización quirúrgica y la adecuación a la profilaxis antibiótica. La incidencia de infección fue menor en la cirugía laparoscópica

Objective: To assess compliance with the antibiotic prophylaxis protocol for patients who underwent renal surgery and its effect on the incidence of surgical wound infection. Material and methods: We performed a prospective cohort study and assessed the overall compliance and each aspect of the antibiotic prophylaxis (start, administration route, antibiotic of choice, duration and dosage) and reported the compliance rates. The qualitative variables were compared with the chi-squared test, and the quantitative variables were compared with Student's t-test. We studied the effect of antibiotic prophylaxis compliance on the incidence of surgical wound infection in renal surgery, with the relative risk. Results: The study included 266 patients, with an overall compliance rate of 90.6%. The major cause of noncompliance (3.8%) was the start of the prophylaxis, and the incidence rate of surgical wound infections was 3.4%. We found no relationship between antibiotic prophylaxis noncompliance and surgical wound infections (RR = 0.26; 95% CI: 0.1-1.2; P > .05). Laparoscopic surgery had a lower incidence of surgical wound infections than open surgery (RR = 0.10; 95% CI: 0.01-0.79). Conclusions: The antibiotic prophylaxis compliance was high. The incidence of surgical site infection was low, and there was no relationship between the incidence of surgical site infection and antibiotic prophylaxis compliance. The incidence of infection was lower in laparoscopic surgery

Short-term association between outdoor air pollution and osteoporotic hip fracture.

This study examines the association of the levels of different airborne pollutants on the incidence of osteoporotic hip fracture in a southern European region. Association was detected between SO2 and NO2 and hospital admissions due to hip fracture. INTRODUCTION: To examine the short-term effects of outdoor air pollution on the incidence of osteoporotic hip fracture in a southern European region. METHODS: This is an ecological retrospective cohort study based on data obtained from three databases. In a time-series analysis, we examined the association between hip fracture incidence and different outdoor air pollutants (sulfur dioxide (SO2), monoxide (NO), nitrogen dioxide (NO2), ozone (O3), and particulate matter in suspension < 2.5 (PM2.5) and < 10-µm (PM10) conditions by using general additive models (Poisson distribution). The incidence rate ratio (IRR), crude and adjusted by season and different weather conditions, was estimated for all parameters. Hip incidence was later analyzed by sex and age (under or over age 75) subgroups. The main outcome measure was daily hospital admissions due to fracture. RESULTS: Hip fracture incidence showed association with SO2 (IRR 1.11 (95% CI 1.04-1.18)), NO (IRR 1.01 (95% CI 1.01-1.02)), and NO2 (IRR 1.02 (95% CI 1.01-1.04)). For O3 levels, this association was negative (IRR 0.97 (95% CI 0.95-0.99)). The association persisted for SO2 and NO2 when the models were adjusted by season. After adjusting by season and weather conditions, the association persisted for NO2. When participants were stratified by age and sex, associations persisted only in women older than 75 years. CONCLUSIONS: A short-term association was observed with several indicators of air pollution on hip fracture incidence. This is the first study that shows these associations.

[Prophylactic antibiotherapy in hip arthroplasty. Cohort study]. / Antibioterapia profiláctica en la artroplastia de cadera. Estudio de cohortes.

OBJECTIVE: The surgical site infection is the main cause of nosocomial infection in surgical patients, being antibiotic prophylaxis one of the most important factors for preventing it. This study evaluates adequacy of antibiotic prophylaxis in hip arthroplasty surgery as well as its effect on preventing surgical site infection. METHODS: A prospective cohort study was carried out from January 2011 to December 2016. We assessed the degree of adequacy of antibiotic prophylaxis in hip arthroplasty. Incidence of surgical site infection was studied after a maximum incubation period of 90 days. In order to assess the effect of inadequate prophylaxis on surgical site infection we used the relative risk adjusted with a logistic regression model. RESULTS: We studied 681 patients. Incidence of surgical site infection was 4% (95% CI 2.5-5.5). Antibiotic prophylaxis was administered in 99% of cases, with an overall protocol adequacy of 74%. The main cause of non-compliance was the length of prescription (22.2%; 149 patients). The effect of inadequate prophylaxis on surgical site infection was RRadjusted=0.47; 95%CI 0.19-1.17, (p>0.05). CONCLUSIONS: Adequacy of antibiotic prophylaxis was high. No relationship between prophylaxis adequacy and incidence of surgical site infection was founded. Surveillance allows us to assess surgical site infection and risk factors.

Incidencia de infección de localización quirúrgica en cirugía de colon y adecuación de la profilaxis antibiótica: estudio de cohortes prospectivo / Incidence of surgical site infection in colon surgery and antibiotic prophylaxis adequacy: prospective cohort study

Fundamento: La infección de localización quirúrgica (ILQ) tiene un considerable impacto clínico y económico a nivel hospitalario, por lo que se consideran prioritarios su prevención y seguimiento. El objetivo de este estudio fue la evaluación del cumplimiento del protocolo de profilaxis antibiótica en la cirugía de colon y el efecto de su inadecuación en la incidencia de ILQ. Material y métodos: Se realizó un estudio de cohortes prospectivo desde julio de 2008 a julio de 2016. Se evaluó el grado de cumplimiento de la profilaxis antibiótica y las causas de incumplimiento en cirugía de colon: duración e inicio, elección, vía de administración y dosis de antibiótico. Se estudió la incidencia de ILQ después de un período máximo de incubación de 30 días. Para evaluar el efecto del incumplimiento de la profilaxis en la ILQ se usó el riesgo relativo (RR). Resultados: El estudio incluyó 771 pacientes. La incidencia acumulada de ILQ fue del 5,8%, la mayoría (67%) infecciones incisionales superficiales. La etiología más frecuente de ILQ fue Escherichia coli (28%). La profilaxis antibiótica se administró en el 97,8% de los pacientes, con un cumplimiento global del protocolo del 91,9%. La causa principal de incumplimiento fue la elección del antibiótico (58,2%). No se encontró relación entre inadecuación de la profilaxis e incidencia de infección de localización quirúrgica (RR=0,5; IC95% 0,1-1,8). Conclusiones: La tasa global de adecuación al protocolo de profilaxis antibiótica fue alta. No se encontró asociación significativa entre adecuación de la profilaxis e incidencia de ILQ en cirugía de colo (AU)

Background: Surgical site infection (SSI) has a considerable clinical and economic impact at the hospital level, so prevention and monitoring are considered a high priority. The objective of this study was to assess compliance with the protocol of antibiotic prophylaxis in colon surgery and the effect of its inadequacy for the incidence of SSI. Methods: Prospective cohort study from July 2008 to July 2016. Compliance with antibiotic prophylaxis protocol and the causes of non-compliance were evaluated in colon surgery: duration and starting, choice, route of administration and dose of the antibiotic. The incidence of SSI was studied after a maximum incubation period of 30 days. Relative risk (RR) was used to evaluate the non-compliance causes of prophylaxis. Results: The study included 771 patients. The cumulative incidence of SSI was 5.8% (n=45), of which 2/3 were superficial incisional infections. The most common cause of SSI was Escherichia coli (28%). Antibiotic prophylaxis was administered in 97.8% of patients, with an overall protocol compliance of 91.9%. The principle cause of non-compliance was the choice of antibiotic (58.2%). No relationship between the inadequacy of prophylaxis and incidence of surgical site infection was found (RR=0.5; CI95% 0.1-1.8). Conclusions: The overall adequacy rate to antibiotic prophylaxis protocol was high. No significant association between the adequacy of prophylaxis and incidence of surgical site infection in colon surgery was foun (AU)

[Incidence of surgical site infection in colon surgery and antibiotic prophylaxis adequacy: prospective cohort study]. / Incidencia de infección de localización quirúrgica en cirugía de colon y adecuación de la profilaxis antibiótica: estudio de cohortes prospectivo.

BACKGROUND: Surgical site infection (SSI) has a considerable clinical and economic impact at the hospital level, so prevention and monitoring are considered a high priority. The objective of this study was to assess compliance with the protocol of antibiotic prophylaxis in colon surgery and the effect of its inadequacy for the incidence of SSI. METHODS: Prospective cohort study from July 2008 to July 2016. Compliance with antibiotic prophylaxis protocol and the causes of non-compliance were evaluated in colon surgery: duration and starting, choice, route of administration and dose of the antibiotic. The incidence of SSI was studied after a maximum incubation period of 30 days. Relative risk (RR) was used to evaluate the non-compliance causes of prophylaxis. RESULTS: The study included 771 patients. The cumulative incidence of SSI was 5.8% (n=45), of which 2/3 were superficial incisional infections. The most common cause of SSI was Escherichia coli (28%). Antibiotic prophylaxis was administered in 97.8% of patients, with an overall protocol compliance of 91.9%. The principle cause of non-compliance was the choice of antibiotic (58.2%). No relationship between the inadequacy of prophylaxis and incidence of surgical site infection was found (RR=0.5; CI95% 0.1-1.8). CONCLUSIONS: The overall adequacy rate to antibiotic prophylaxis protocol was high. No significant association between the adequacy of prophylaxis and incidence of surgical site infection in colon surgery was found.

Adecuación de la profilaxis antibiótica en la artroplastia de rodilla e infección del sitio quirúrgico: estudio de cohortes prospectivo / Antibiotic prophylaxis adequacy in knee arthroplasty and surgical wound infection: prospective cohort study

Objetivo. Evaluar el grado de adecuación al protocolo de profilaxis antibiótica en pacientes intervenidos de artroplastia de rodilla y su influencia en la infección quirúrgica. Material y método. Se realizó un estudio de cohortes prospectivo. El grado de adecuación se estudió mediante la comparación de las características de la profilaxis recibida por los pacientes y la estipulada en el protocolo vigente de nuestro hospital. El efecto de la profilaxis en la incidencia de la infección quirúrgica se estimó con el riesgo relativo. Resultados. Se incluyeron 1.749 intervenciones. La incidencia de infección del sitio quirúrgico fue del 1,43% (n=25). La adecuación global al protocolo de profilaxis antibiótica fue del 77,6%. La causa más frecuente de inadecuación al protocolo fue la duración prescrita de los antibióticos de la profilaxis (46,5%). La adecuación de la profilaxis antibiótica no influyó en la infección del sitio quirúrgico (RR=1,15; IC 95%: 0,31-2,99; p>0,05). Discusión. Los programas de vigilancia y control de la infección permiten evaluar factores de riesgo de infección y evaluar medidas de mejora. La vigilancia de las tasas de infección quirúrgica nos permite tomar las medidas oportunas encaminadas a reducir progresivamente su incidencia. Conclusiones. La adecuación de la profilaxis antibiótica fue alta, pero se puede mejorar. No hubo relación entre la adecuación de la profilaxis y la incidencia de infección de la herida quirúrgica en artroplastia de rodilla (AU)

Objective. Antibiotic prophylaxis is the most suitable tool for preventing surgical wound infection. This study evaluated adequacy of antibiotic prophylaxis in surgery for knee arthroplasty and its effect on surgical site infection. Material and method. Prospective cohort study. We assessed the degree of adequacy of antibiotic prophylaxis, the causes of non-adequacy, and the effect of non-adequacy on surgical site infection. Incidence of surgical site infection was studied after a maximum incubation period of a year. To assess the effect of prophylaxis non-adequacy on surgical site infection we used the relative risk adjusted with the aid of a logistic regression model. Results. The study covered a total of 1749 patients. Antibiotic prophylaxis was indicated in all patients and administered in 99.8% of cases, with an overall protocol adequacy of 77.6%. The principal cause of non-compliance was the duration of prescription of the antibiotics (46.5%). Cumulative incidence of surgical site infection was 1.43%. No relationship was found between prophylaxis adequacy and surgical infection (RR=1.15; 95% CI: .31-2.99) (P>.05). Discussion. Surveillance and infection control programs enable risk factors of infection and improvement measures to be assessed. Monitoring infection rates enables us to reduce their incidence. Conclusions. Adequacy of antibiotic prophylaxis was high but could be improved. We did not find a relationship between prophylaxis adequacy and surgical site infection rate (AU)

Radiología médico-legal: un dilema ético para el técnico en radiología / Medical-legal radiology: an ethical dilemma for radiology technician / Radiologia médico-legal: um dilema ético para o técnico de Radiologia

Resumen: Las exploraciones radiológicas médico-legales incluyen exposiciones médicas a radiaciones que se realizan por orden judicial a una persona que no está enferma. El técnico o tecnólogo médico en radiología tiene el deber de minimizar las dosis a pacientes y a la población en su conjunto; por ello, realizar este tipo de exploraciones entra en conflicto con las máximas de la protección radiológica y de su código ético. Presentamos un estudio de revisión donde se analiza si estas prácticas médicas son contrarias a la ética profesional del técnico en radiología.

Abstract: The medico-legal, radiological examinations include those medical exposures to radiation conducted by court order a person who is not sick. The radiologic technologist has a duty to minimize the dose to patients and the population as a whole, therefore, make this type of exploration conflicts with the maximum of Radiation Protection and its ethical code. We present a review study where we analyze whether these medical practices are contrary to professional ethics of the Radiologic technologist.

Resumo: As explorações radiológicas médico-legais incluem aquelas exposições médicas a radiações que se realizam por ordem judicial a uma pessoa que não está doente. O técnico ou tecnólogo médico em radiologia tem o dever de minimizar a dose para os pacientes e a população como um todo; portanto, realizar este tipo de exploração entra em conflito com os princípios da proteção radiológica e de seu código de ética. Apresentamos um estudo de revisão no qual analisamos se estas práticas médicas são contrárias à ética profissional do técnico em radiologia.

Antibiotic prophylaxis adequacy in knee arthroplasty and surgical wound infection: Prospective cohort study. / Adecuación de la profilaxis antibiótica en la artroplastia de rodilla e infección del sitio quirúrgico: estudio de cohortes prospectivo.

OBJECTIVE: Antibiotic prophylaxis is the most suitable tool for preventing surgical wound infection. This study evaluated adequacy of antibiotic prophylaxis in surgery for knee arthroplasty and its effect on surgical site infection. MATERIAL AND METHOD: Prospective cohort study. We assessed the degree of adequacy of antibiotic prophylaxis, the causes of non-adequacy, and the effect of non-adequacy on surgical site infection. Incidence of surgical site infection was studied after a maximum incubation period of a year. To assess the effect of prophylaxis non-adequacy on surgical site infection we used the relative risk adjusted with the aid of a logistic regression model. RESULTS: The study covered a total of 1749 patients. Antibiotic prophylaxis was indicated in all patients and administered in 99.8% of cases, with an overall protocol adequacy of 77.6%. The principal cause of non-compliance was the duration of prescription of the antibiotics (46.5%). Cumulative incidence of surgical site infection was 1.43%. No relationship was found between prophylaxis adequacy and surgical infection (RR=1.15; 95% CI: .31-2.99) (P>.05). DISCUSSION: Surveillance and infection control programs enable risk factors of infection and improvement measures to be assessed. Monitoring infection rates enables us to reduce their incidence. CONCLUSIONS: Adequacy of antibiotic prophylaxis was high but could be improved. We did not find a relationship between prophylaxis adequacy and surgical site infection rate.