Entrenamiento de competencias procedimentales quirúrgicas básicas en estudiantes de Medicina mediante un modelo de simulación (EPROBA) / Training of basic surgical procedural skills in medical students using a simulation model (EPROBA)

Resumen Introducción: Los modelos de simulación otorgan entornos controlados para la práctica y la retroalimentación por parte de un tutor. Frente a una primera experiencia, nuestro grupo implementó un modelo simplificado y reproducible para el entrenamiento de habilidades quirúrgicas básicas. Objetivo: Comunicar los resultados de un taller de entrenamiento basado en simulación para la adquisición de habilidades quirúrgicas básicas en estudiantes de Medicina. Materiales y Método: Estudio cuasiexperimental, antes y después, 124 estudiantes de medicina de cuarto año fueron entrenados con la metodología EPROBA (Entrenamiento Procedimental Básico), previo consentimiento informado. Mediante el instrumento "The Objective StructuredAssessment Of Technical Skills" (OSATS) se evaluó la técnica de sutura previo y posterior a la intervención. Se evaluó la percepción de los estudiantes mediante una encuesta validada. Para el análisis estadístico se utilizó SPSS24® y se usó la prueba Mann Whitney para variables no paramétricas considerando significativo p < 0,05. Resultados: El grupo muestra un progreso promedio significativo en su desempeño procedimental. En la Lista de Comprobación OSATS muestra un progreso desde 4,1 puntos a 8,9 (p < 0,001). En la Escala Global OSATS muestra un puntaje basal de 13,0 puntos, aumentando a 28,0 puntos (p < 0,001). La intervención fue bien percibida, obteniendo un puntaje total promedio de 65,4 puntos de 68 máximos. Conclusión: En nuestra experiencia, un modelo simplificado demostró ser eficaz para el entrenamiento en habilidades procedimentales simples como suturas. Múltiples instancias de práctica deben ser otorgadas por las Facultades de Medicina para la retención y mejora de estas habilidades.

Background: Simulation models provide controlled environments for the practice and tutor feedback. Faced with a first experience, our group implemented a simplified and reproducible model for the training of basic surgical skills. Aim: Communicate the results of a training workshop based on simulation for the basic surgical skills training in medical students. Materials and Method: Quasi-experimental study, before and after, 124 fourth year medical students were trained with "EPROBA" methodology, with prior informed consent. Through the instrument "The Objective Structured Assessment of Technical Skills" (OSATS) the technique of suture before and after the intervention was evaluated. The perception of the students was evaluated through a validated survey. For statistical analysis SPSS24® was used and the Mann Whitney test was used for nonparametric variables, it was considered significant p < 0.05. Results: The group shows a significant average progress in its procedural performance. In the OSATS Checklist they show a progress from 4.1 points to 8.9 after the intervention (p < 0.001). In the OSATS Global Scale they show a baseline score of 13.0 points, rising to 28.0 points (p < 0.001). The intervention was well perceived, obtaining a total average score of 65.4 points of 68 maximums. Conclusión: In our experience, a simplified model proved to be effective for training in simple procedural skills such as sutures. Multiple instances of practice must be granted by the Faculties of Medicine for the retention and improvement of these skills.

Hemotórax masivo por traumatismo torácico en pacientes tratados quirúrgicamente / Massive hemothorax by thoracic trauma in surgically treated patients

Resumen Introducción: El hemotórax masivo (HM) se puede definir como el acúmulo súbito de ≥ 1.500 ml de sangre en la cavidad pleural o débito ≥ 200 ml/h de sangre en 3-4 h por pleurotomía; es considerada una complicación traumática grave. Objetivo: Describir las características clínicas, índices de gravedad de traumatismo (IGT), morbilidad y variables asociadas a mortalidad en pacientes con hemotórax masivo por traumatismo torácico operados (HMTT). Materiales y Método: Estudio analítico longitudinal. Período enero de 1981 a diciembre de 2018. Revisión prospectiva de base de datos, protocolos quirúrgicos y fichas clínicas. Descripción de características de HMTT. Se calcularon IGT: Injury Severity Score (ISS), Revised Trauma Score (RTS-T), Trauma Injury Severity Score (TRISS). Para mortalidad se realizó análisis univariado con cálculo de Odds Ratio. Resultados: Total 4.306 traumatismos torácicos (TT), HMTT 119 (2,8%). Hombres 112 (94,1%), edad promedio 32 ± 13,2 años, 91 (76,5%) pacientes presentaron TT aislado, 28 (23,5%) asociado a lesiones extratorácicas, de estos, 23 (19,3%) fueron politraumatismos. Fueron traumatismos penetrantes 102 (85,7%). El HMTT se atribuyó principalmente a: lesión de pared en 38 (31,9%) y lesión pulmonar en 29 (24,4%). De las cirugías torácicas: 87 (73,1%) fueron urgentes (≤ 4 h), 10 (8,4%) precoces (> 4-24 h) y 22 (18,5%) diferidas (> 24 h). Hospitalización postoperatoria promedio 7,9 ± 6,4 días. Según IGT: ISS promedio 17,4 ± 9,6, RTS-T promedio 10,2 ± 2,7, TRISS promedio 12,7. Morbilidad 46 (38,7%) y mortalidad 15 (12,6%). Discusión: Los HMTT se atribuyeron principalmente a lesiones de pared y lesión pulmonar. En la mayoría se requirió cirugía torácica de urgencia. La mortalidad observada es semejante a la esperada según IGT. Existen variables asociadas a mayor mortalidad.

Introduction: Massive hemothorax (MH) can be defined as the sudden accumulation of ≥ 1500 ml of blood in the pleural cavity or debit ≥ 200 ml/h in 3-4 hours through pleurostomy, and it is considered a serious complication. Aim: To describe features, trauma severity indexes (TSI), morbidity and variables associated with mortality in patients with traumatic MH who required surgical treatment. Materials and Method: analytical longitudinal study. Period January 1981 to December 2018. Database, surgical protocols, medical records review. Description of MH characteristics. The following TSI were calculated: Injury Severity Score (ISS), Revised Trauma Score (RTS-T), Trauma Injury Severity Score (TRISS). An Odds Ratio univariate analysis was used for mortality. Results: Total 4306 TT, operated MH 119 (2.8%). Men were 112 (94.1%), average age 32 ± 13.2 years, 91 (76.5%) had isolated TT, 28 (23.5%) were associated with extrathoracic injuries and of these 23 (19.3%) were polytraumatized patients. Penetrating TT was 102 (85.7%). MH was mainly attributed to: chest wall injury in 38 (31.9%), pulmonary lacerations 29 (24.4%). Of the thoracic surgeries: 87 (73.1%) were urgent (≤ 4 h), 10 (8.4%) early (> 4-24 h) and 22 (18.5%) deferred (> 24 h). Average post operatory stay (days): 7.9 ± 6.4 According to TSI: average ISS 17.4 ± 9.6; RTS-T average 10.2 ± 2.7; TRISS average 12.7. Morbidity 46 (38.7%). Mortality 15 (12.6%). Discussion: MH is mainly attributed to chest wall injuries and pulmonary lacerations. Most of HM required urgent thoracic surgery. The observed mortality is similar to that expected one by TSI. There are variables associated with higher mortality in MH.

Traumatismo torácico por arma de fuego / Thoracic trauma by firearms

Resumen Introducción: Los traumatismos torácicos por armas de fuego (TTAF) son cada vez más frecuentes. Objetivos: Describir características clínicas, morbilidad, mortalidad y la evolución a través del tiempo de hospitalizados por TTAF. Materiales y Método: Estudio analítico longitudinal. Período enero de 1981-diciembre de 2018. Revisión base de datos, protocolos prospectivos y fichas clínicas. Se utilizó planilla Microsoft Excel® y programa SPSS24® con chi cuadrado y de Mann-Whitney. Descripción de características de TTAF en pacientes hospitalizados y comparación por períodos. Se calcularon índices de gravedad del traumatismo (IGT): Injury Severity Score (ISS), Revised Trauma Score (RTS-T), Trauma Injury Severity Score (TRISS). Resultados: Total 4.306 pacientes hospitalizados por traumatismo torácico (TT), 205 (4,8%) hospitalizados por TTAF. Hombres: 188 (91,7%), edad promedio 28,8 ± 11,2 años, TTAF aislado 115 (56,1%), asociado a lesiones extratorácicas 90 (43,9%), de estos 55 (26,8%) se consideraron politraumatismos. Mecanismo: Agresión 193 (94,1%), autoagresión 11 (5,4%) y accidental 1 (0,5%). Lesiones y/o hallazgos torácicos más frecuentes: Hemotórax 127 (62,0%), neumotórax 96 (46,8%) y contusión pulmonar 51 (24,9%). Tratamiento definitivo: Pleurotomía 88 (42,9%), cirugía 71 (34,6%) y tratamiento médico 46 (22,4%). Mediana de hospitalización 7 días. Según IGT: ISS promedio 16,7 ± 11,7, RTS-T promedio 11,1 ± 2,1, TRISS promedio 9,6. Morbilidad: 44 (21,5%). Mortalidad: 14 (6,8%). En los diferentes períodos, se observó aumento de politraumatismos y TRISS, sin cambios en mortalidad. Discusión: La mayoría de los TTAF fueron aislados. Aproximadamente un tercio de los pacientes requirió cirugía. La mortalidad observada es menor a la esperada. Se observan cambios en los TTAF a través del tiempo.

Background: Thoracic trauma by firearms (TTF) are increasingly frequent. Aim: To describe clinical characteristics, morbidity and mortality and the evolution over time of patients hospitalized due TTF. Materials and Method: Longitudinal analytical study. Period January 1981 - December 2018. Database review, prospective protocols and clinical files. Microsoft Excel® spreadsheet and SPSS24® program with chi square and Mann-Whitney tests were used. Description of characteristics of TTF in hospitalized patients and comparison of TTF by periods. Trauma severity indexes (TSI) were calculated: Injury Severity Score (ISS), Revised Trauma Score (RTS-T), Trauma Injury Severity Score (TRISS). Results: Total: 4306 hospitalized patients due thoracic trauma (TT), 205 (4.8%) hospitalized due TTF. Men: 188 (91.7%), average age 28.8 ± 11.2 years, isolated TTF 115 (56.1%), associated with extrathoracic lesions 90 (43.9%), and of these 55 (26.8%) were considered polytraumatism. Mechanisms: aggression 193 (94.1%), self-harm 11 (5.4%) and accidental 1 (0.5%). Frequent thoracic injuries and/or findings: hemothorax 127 (62.0%), pneumothorax 96 (46.8%) and pulmonary contusion 51 (24.9%). Definitive treatment: Pleurotomy 88 (42.9%), surgery 71 (34.6%) and medical treatment 46 (22.4%). Median hospitalization 7 days. According TSI: Average ISS 16.7 ± 11.7, average RTS-T 11.1 ± 2.1, average TRISS 9.6. Morbidity: 44 (21.5%). Mortality: 14 (6.8%). There is an increase in polytraumatism and average TRISS, without changes in mortality. Discussion: The majority of TTF were isolated TT. Approximately one third of patients required surgery. The observed mortality is lower than expected. Changes in TTF were observed over time.

Hidatidosis pulmonar: hallazgos y tratamiento quirúrgico en quistes complicados versus no complicados / Pulmonary hydatidosis: findings and surgical treatment in complicated versus uncomplicated cysts

Resumen Introducción: La hidatidosis humana es una zoonosis prevalente en nuestro medio, causada principalmente por el parásito Echinococcus granulosus. Las complicaciones más frecuentes en el pulmón son la rotura y la infección del quiste. Objetivos: Describir y comparar características clínicas, tratamiento, morbilidad y mortalidad de los pacientes hospitalizados por quiste hidatídico pulmonar (QHP) complicado versus no complicado. Materiales y Método: Estudio analítico longitudinal. Período enero de 1973 - diciembre de 2017 en Hospital Clínico Regional de Concepción "Dr. Guillermo Grant Benavente", Chile. Revisión de base de datos, protocolos de QHP y fichas clínicas. Se utilizó planilla Microsoft Excel® y programa SPSS24®, con función chi cuadrado y t de Student. Se consideró significativo p < 0,05. Resultados: Total 364 episodios de QHP, complicados 179 (49,2%) versus no complicados 185 (50,8%). Edad promedio 36,4 ± 18,9 versus 32,4 ± 19,1 años, hombres 114 (63,7%) versus 107 (57,8%), respectivamente. Se encontró diferencia estadísticamente significativa en: sintomatología tos 147 (82,1%) versus 120 (64,9%), hemoptisis 93 (52,0%) versus 45 (24,3%), respectivamente; QHP derecho 115 (64,2%) versus 99 (53,5%), respectivamente; cirugía conservadora 139 (77,7%) versus 167 (90,3%), reoperaciones 22 (12,3%) versus 8 (4,3%), respectivamente; morbilidad 47 (26,3%) versus 30 (16,2%), mortalidad 6 (3,4%) versus 0 (0%), estadía hospitalaria postoperatoria promedio 16,1 ± 14,3 versus 10,7 ± 7,7 días, recidivas 15 (8,4%) versus 13 (7,0%), respectivamente. Discusión: Aproximadamente la mitad de los QHP son complicados. Los QHP complicados presentan diferencias estadísticamente significativas en su clínica, tratamiento, morbilidad, mortalidad y estadía hospitalaria postoperatoria.

Background: Human hydatidosis is a prevalent zoonosis in our environment, caused mainly by the Echinococcus granulosus parasite. The most common complications in the lung are cyst rupture and infection. Aim: To describe and compare clinical characteristics, treatment, morbidity and mortality of patients hospitalized for complicated versus uncomplicated hydatid pulmonary cyst (HPC). Materials and Method: Longitudinal analytical study. Period January 1973 - December 2017 at the Regional Clinical Hospital of Concepción "Dr. Guillermo Grant Benavente", Chile. Database, prospective protocols and medical records were reviewed. Microsoft Excel® spreadsheet and SPSS24® program with chi square and Student's t-test were used. It was considered significant p < 0.05. Results: Total 364 episodes of HPC, complicated 179 (49.2%) versus uncomplicated 185 (50.8%). Average age 36.4 ± 18.9 versus 32.4 ± 19.1 years, male 114 (63.7%) versus 107 (57.8%), respectively. A statistically significant difference was found in: symptomatology cough 147 (82.1%) versus 120 (64.9%), hemoptysis 93 (52.0%) versus 45 (24.3%), respectively; HPC right 115 (64.2%) versus 99 (53.5%), respectively; resective cyst surgery 139 (77.7%) versus 167 (90.3%), reoperation 22 (12.3%) versus 8 (4.3%), respectively; morbidity 47 (26.3%) versus 30 (16.2%), mortality 6 (3.4%) versus 0 (0%), average postoperative hospital stay 16.1 ± 14.3 versus 10.7 ± 7.7 days, recurrence 15 (8.4%) versus 13 (7.0%), respectively. Conclusions: Approximately half of the HPCs are complicated. Complicated HPCs present statistically significant differences in their clinical, treatment, morbidity, mortality and postoperative hospital stay.

[Primary cardiac tumors. Experience in 72 cases]. / Tumores cardíacos primarios.

BACKGROUND: Primary cardiac tumors have a low incidence, and their presentation form and clinical course are not well known. AIM: To describe the characteristics, treatment, follow up and survival of patients with primary cardiac tumors (PCT). MATERIAL AND METHODS: Review of all surgical procedures for PCT performed between 1984 and 2019 in a regional general hospital. The information was obtained from surgical protocols, surgical and pathology databases, medical records and registries of the Chilean National Identification Service. The clinical features of patients, immediate and long term outcomes are described. RESULTS: Seventy-two surgical procedures for PCT were reviewed. Patients' age was 55 ± 15 years and 60% were women. The most common histological types were myxoma in 49 patients (68%), papillary fibroelastoma in 13 (18%) and sarcoma in 6 (8.3%). Forty-nine (68.1%) were symptomatic and all tumors were found on echocardiography. Fifty-one (71%) were in the left atrium, 10 (14%) in the aortic valve and eight (11%) in the right atrium. The surgical procedures were tumor resection in 48 patients (67%) and resection and repair with patch in 23 (32%). Mean postoperative stay was 6.6 ± 4.4 days, eight patients (11%) had complications and no patient died in the immediate postoperative period. Long term survival was higher in patients with benign PCT as compared with those with malignant tumors. CONCLUSIONS: Most PCTs in this group of patients were benign neoplasms and the most common tumors were myxomas. The main diagnostic method is echocardiography and the prognosis of surgical treatment is excellent when the tumors are benign. (Rev Med Chile 2020; 148: 327-335).

Traumatismo torácico por arma blanca / Thoracic trauma by a bladed weapon

Resumen Objetivos Describir las características, índices de gravedad de traumatismo (IGT), morbilidad, mortalidad y factores asociados a mortalidad en pacientes hospitalizados por traumatismo torácico por arma blanca (TTAB). Materiales y Método Estudio analítico transversal. Período enero de 1981 a diciembre de 2017. Revisión base de datos prospectiva, protocolos quirúrgicos, fichas clínicas. Se describe y compara las características de los TTAB. Se calculó IGT: Injury Severity Score (ISS), Revised Trauma Score ( RTS-T) y Trauma Injury Severity Score (TRISS). Resultados Total 4.163 pacientes hospitalizados por TT, 2.286 hospitalizados por TTAB. Hombres: 2.131 (93,2%), edad promedio 27,8 ± 10,7 años, TTAB aislado 2.035 (89,0%), asociado a lesiones extratorácicas 251 (11,0%) y de éstos 124 (5,5%) se consideraron politraumatismos. Mecanismos principales del traumatismo: agresión 2.246 (98,3%) y autoagresión 22 (1,0%). Lesiones y hallazgos torácicos más frecuentes: neumotórax 1.473 (64,4%), hemotórax 1.408 (61,6%), enfisema subcutáneo 485 (21,2%). Tratamiento definitivo: pleurotomía 1.378 (60,3%), cirugía torácica 537 (23,5%) y tratamiento médico 370 (16,2%). Hospitalización promedio 6,2 ± 6,5 días, IGT: ISS promedio 10,9 ± 7,2, RTS-T promedio 11,6 ± 1,4 y TRISS promedio 3,6. Morbilidad: 318 (13,9%). Mortalidad: 32 (1,4%). Conclusión Los TTAB ocurren frecuentemente en hombres jóvenes por agresión. La mayoría se puede tratar con pleurotomía exclusiva.

Aim Our objectives are to describe and correlate the clinical characteristics, trauma severity indexes (TSI) and morbidity and mortality in patients hospitalized for thoracic trauma by a bladed weapon (TTBW). Materials and Method Transversal analytic study. Period January-1981 to December-2017. Prospective database review, surgical protocols, clinical files. The characteristics of the TTBW are described and compared. Injury Severity Score (ISS), Revised Trauma Score (RTS-T) and Trauma Injury Severity Score (TRISS) were calculated. Results Total of 4,163 patients hospitalized for TT, 2,286 hospitalized for TTBW. Men: 2,131 (93.2%), average age 27.8 ± 10.7 years, isolated TTBW 2,035 (89.0%), associated with extra thoracic injuries 251 (11.0%) and of these 124 (5.5%) were considered polytrauma. Main mechanisms of trauma: Aggression 2,246 (98.3%) and self-aggression 22 (1.0%). Most frequent injuries and thoracic findings: pneumothorax 1,473 (64.4%), hemothorax 1,408 (61.6%), subcutaneous emphysema 485 (21.2%). Definitive treatment: Pleurotomy 1,378 (60.3%), thoracic surgery 537 (23.5%) and medical treatment 370 (16.2%). Average hospital stay: 6.2 ± 6.5 days. ISS average 10.9 ± 7.2, RTS-T average 11.6 ± 1.4 and TRISS average 3.6. Morbidity: 318 (13.9%). Mortality: 32 (1.4%). Discussion TTBW are frequent in our environment, unlike on an international level. Conclusions TTBW frequently occur in young male patients due to aggression. The majority can be treated with exclusive pleurotomy.

Tumores cardíacos primarios / Primary cardiac tumors. Experience in 72 cases

Background: Primary cardiac tumors have a low incidence, and their presentation form and clinical course are not well known. Aim: To describe the characteristics, treatment, follow up and survival of patients with primary cardiac tumors (PCT). Material and Methods: Review of all surgical procedures for PCT performed between 1984 and 2019 in a regional general hospital. The information was obtained from surgical protocols, surgical and pathology databases, medical records and registries of the Chilean National Identification Service. The clinical features of patients, immediate and long term outcomes are described. Results: Seventy-two surgical procedures for PCT were reviewed. Patients' age was 55 ± 15 years and 60% were women. The most common histological types were myxoma in 49 patients (68%), papillary fibroelastoma in 13 (18%) and sarcoma in 6 (8.3%). Forty-nine (68.1%) were symptomatic and all tumors were found on echocardiography. Fifty-one (71%) were in the left atrium, 10 (14%) in the aortic valve and eight (11%) in the right atrium. The surgical procedures were tumor resection in 48 patients (67%) and resection and repair with patch in 23 (32%). Mean postoperative stay was 6.6 ± 4.4 days, eight patients (11%) had complications and no patient died in the immediate postoperative period. Long term survival was higher in patients with benign PCT as compared with those with malignant tumors. Conclusions: Most PCTs in this group of patients were benign neoplasms and the most common tumors were myxomas. The main diagnostic method is echocardiography and the prognosis of surgical treatment is excellent when the tumors are benign. (Rev Med Chile 2020; 148: 327-335)

Tutoría por pares de distinto año académico en la enseñanza de habilidades quirúrgicas básicas en estudiantes de pregrado de medicina / Peer tutoring in the teaching of basic surgical skills in medical undergraduate students

Resumen Objetivo: Nuestro objetivo es comparar la efectividad de la tutoría impartida por pares de 6° versus 14° semestre en la adquisición de habilidades procedimentales básicas en estudiantes de medicina. Materiales y Método: Estudio cuasi-experimental, antes y después. La intervención consta inicialmente de un curso de formación de monitores de sutura (MS) para dos estudiantes de 6° y dos de 14° semestre de medicina. Posteriormente se implementó un taller de sutura tutorizado por MS a 23 estudiantes de 8° semestre de medicina. Se evaluó sutura continua y discontinua mediante el instrumento: "The Objective Structured Assessment Of Technical Skills" (OSATS) y satisfacción mediante encuesta tipo Likert validada por expertos. Se describen y comparan los resultados pre y postintervención y satisfacción de los estudiantes, de acuerdo al semestre cursado del MS. Se aplicó consentimiento informado. Se utilizó SPSS24® para análisis estadístico mediante prueba de Mann Whitney. Se consideró significativo p < 0,05. Resultados: Ambos grupos progresaron significativamente en la escala OSATS, grupo tutorizado por MS de 6° semestre: 18,1 vs 28,1 (p < 0,001) y grupo tutorizado por MS de 14° semestre: 15,5 vs 27,8 (p < 0,001). Los puntajes finales no presentan diferencias significativas. La intervención fue evaluada con 66 de 68 puntos, sin diferencias significativas según el semestre cursado del MS. Conclusión: Nuestra experiencia muestra que es posible utilizar la tutoría por pares entrenados para la enseñanza de habilidades quirúrgicas, independientemente si la tutoría es impartida por pares de cursos inferiores o superiores, logrando un progreso significativo y un desempeño procedimental equivalente, además de una alta satisfacción entre los estudiantes.

Aim: Our objective is to compare the effectiveness of tutoring taught by 6th versus 14th semester peer students in the acquisition of basic procedural skills in medical students. Materials and Method: Quasi experimental study, before and after. The intervention initially consists of a training workshop for suture monitors (SM) for two students of 6th and two students of 14th semester of medicine. Subsequently, a suture workshop taught by SM to 23 fourth-year medical students was implemented. Continuous and discontinuous suture was evaluated using the instrument: "Objective structured evaluation of technical skills" (OSATS) and satisfaction through a survey validated by experts. The results of pre and post intervention and student satisfaction are described and compared, according to the semester attended by the SM. Informed consent was applied. Excel® and SPSS24® were used for statistical analysis by Mann Whitney test. It was considered significant p < 0.05. Results: Both groups progressed significantly on the OSATS scale, group tutored by 6° semester SM: 18.1 vs 28,1 (p < 0.001) and group tutored by 14° semester SM: 15.5 vs 27,8 and (p < 0.001). The final scores did not they present significant differences. The intervention was well evaluated with 66 out of 68 points, without significant differences according to the semester coursed of the SM. Conclusion: Our experience shows that it is possible to use peer tutoring by trained tutors to teach surgical skills, regardless of whether the teaching is given by pairs of lower or higher courses, achieving significant progress and equivalent procedural performance, in addition to high satisfaction among students.

Traumatismo torácico contuso / Blunt Thoracic Trauma

INTRODUCCIÓN: El traumatismo torácico (TT) es una causa importante de morbilidad y mortalidad, presente en el 25-50% de la mortalidad por traumatismo. El TT contuso (TTC) es el tipo más frecuente de TT según las diferentes publicaciones internacionales. OBJETIVO: Nuestros objetivos son describir las características, tratamientos, morbilidad y mortalidad en pacientes hospitalizados por TTC en nuestra institución. MATERIAL Y MÉTODOS: Estudio descriptivo transversal desde enero-1981 a diciembre-2017. Revisión de una base de datos prospectiva, protocolos quirúrgicos y fichas clínicas. Se describen y comparan las características de los TTC. Se calcularon índices de gravedad de traumatismo (IGT): Injury Severity Score (ISS), Revised Trauma Score (RTS-T), Trauma Injury Severity Score (TRISS). RESULTADOS: Total 4.163 pacientes hospitalizados por TT, 1.719 (41,3%) TTC. Hombres 1.327 (77,2%), edad promedio 46,7±18,8 años. Se consideró TT aislado 966 (56,2%), asociado a lesiones extratorácicas 753 (43,8%) y de estos 508 (29,6%) eran politraumatizados. Mecanismo: Accidente de tránsito 838 (48,7%), caída de altura 279 (16,2%). Lesiones y hallazgos torácicos: fractura costal 1.294 (75,3%), neumotórax 752 (43,1%). Tratamiento: médico 874 (50,8%), pleurotomía 704 (41%) y cirugía torácica 141 (8,2%). Período de hospitalización 9,2 ± 9,5 días. Según IGT: ISS promedio 14,1 ± 11,1, RTS-Tpromedio 11,5 ± 1,5, TRISS promedio 6,6. Morbilidad en 297 (17,3%), mortalidad en 68 (4%). DISCUSIÓN: La causa principal de los TTC fue el accidente de tránsito. La fractura costal correspondió a la lesión torácica más frecuente. La mayoría requirió solo tratamiento médico. La mortalidad fue menor a la esperada según IGT.

BACKGROUND: Thoracic trauma (TT) is a major cause of morbimortality, involved in 25-50% of trauma deaths. Internationally, blunt thoracic trauma (BTT) is the most frequent type of TT. OBJECTIVE: Our objectives are to describe the clinical characteristics, treatments, morbidity and mortality in patients hospitalized by blunt thoracic trauma (BTT) in our institution. MATERIAL AND METHODS: Cross-sectional descriptive study from january-1981 to december-2017. Prospective database review, surgical protocols and clinical files. The characteristics of the BTT are described and compared. The following trauma severity indices (TSI) were calculated: Injury Severity Score (ISS), Revised Trauma Score (RTS-T) and Trauma Injury Severity Score (TRISS). RESULTS: 4,163 patients were hospitalized because of TT, 1.719 (41.3%) of them with BTT. 1,327 (77.2%)patients were men, average age 46.7 ± 18.8 years-old. We considered isolated TT 966 (56.2%), associated with extrathoracic lesions 753 (43,8%) and 508 (29.6%)with polytraumatism. Mechanism: Traffic accident 838 (48.7%), fall down from a height 279 (16.2%). Lesions and intrathoracic findings: rib fracture 1.294 (75.3%), pneumothorax 752 (43.7%). Treatment: Medical 876 (50.8%), pleurotomy 704 (41%) and thoracic surgery 141 (8.2%). Average hospitalized period 9.2 ± 9.5 days. According to TSI: ISS average 14.1 ± 11.1, RTS-T average 11.5 ± 1.5, TRISS average 6.6. Morbidity in 297 (17.3%), mortality in 68 (4%). DISCUSSION: The TTC was mainly attributed to the traffic accident. Rib fracture was the most common chest injury. The majority of patients required only medical treatment. Mortality was lower than expected according to TSI.

Pleurodesis con sangre autóloga en neumotórax espontaneo secundario con fuga aérea persistente / Autologous blood pleurodesis in secondary spontaneous pneumothorax with persistent air leak

Introducción: El neumotórax espontáneo secundario (NES) es la presencia de aire en la cavidad pleural con ausencia de traumatismo, asociado a alguna enfermedad pulmonar subyacente. La pleurodesis es considerada una alternativa al tratamiento de esta patología. La fuga aérea persistente o masiva es una complicación importante del NES, donde la utilización de pleurodesis con sangre autóloga constituye una opción conveniente en pacientes con alto riesgo quirúrgico. Objetivos: Se propuso describir las características de pacientes con NES tratados con pleurodesis con sangre autóloga en Hospital Regional de Concepción. Pacientes y método: Estudio descriptivo transversal, período enero 2012 - enero 2015. Se realizó una revisión de base de datos, protocolos quirúrgicos y fichas clínicas, seguimiento clínico a 36 meses, donde se describieron características clínicas, morbimortalidad, resultados inmediatos y tardíos. Resultados: Del total de pacientes (n=7), 5 (71,4 %) fueron hombres, con edad promedio de 60,7±8,2 años. La causa del NES fue mayoritariamente enfermedad pulmonar difusa en seis pacientes (85,7 %). Se realizaron siete pleurodesis con sangre autóloga sin necesidad de repetir el procedimiento. Se observó cierre de fístula en el 100 % de los pacientes. Al seguimiento no se observó necesidad de nuevos procedimientos. Discusión: La pleurodesis con sangre autóloga es un tratamiento efectivo y seguro en el manejo de la fuga aérea persistente o masiva, con adecuados resultados inmediatos y tardíos en casos seleccionados.

Introduction: Secondary spontaneous pneumothorax (NES) is pleural air occupation without trauma associated with the presence of some underlying lung disease. Pleurodesis is considered an alternative to the treatment of this disease. Persistent or massive air leak is a major complication of NES, where the use of pleurodesis with autologous blood is an accepted option in patients with high surgical risk and air leak. Objetive: Describe characteristics of patients with NES treated with pleurodesis with autologous blood in Hospital Regional of Concepción. Patients and methods: Cross-sectional descriptive study period January 2012- January 2015. It`s made a review of Database, surgical protocols and review medical records, 36 months' clinical follow-up. Description of clinical features, morbidity and mortality, immediate and remote results. Results: Of all patients (n=7), 5 (71.4 %) were males, mean age 60.7 ± 8.2 years. The cause of NES was predominantly diffuse lung disease in 6 (85.7%) patients. Seven pleurodesis with autologous blood were performed without repeating the procedure. Fistula closure was observed in 100% of patients. In follow the need for new procedures wasn't observed. Discussion: Pleurodesis with autologous blood is an effective and safe treatment in the management of persistent or massive air leak, with immediate and remote adequate results.