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1.
Ir J Med Sci ; 186(3): 583-588, 2017 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-28281040

RESUMEN

INTRODUCTION: Rapid Access Prostate Clinics (RAPC) were introduced in Ireland by the National Cancer Control Programme bringing about expedited referral pathways and increased detection rates of prostate cancer. Lower Gleason (G) grade at diagnosis due to RAPC has been previously reported but grade at prostatectomy has not been assessed. The aim of this study was to assess the impact of RAPC on the outcomes of patients with G7 disease on radical prostatectomy (RP). METHODS: A retrospective analysis was carried out of all RPs performed over a 9-year period (2006-2014). Outcomes for G7 prostatectomies were compared before and after the introduction of the RAPC, with a further sub-analysis of G4 + 3 versus G3 + 4. The primary outcome was biochemical recurrence (BCR). Other outcomes were adjuvant/salvage radiotherapy, extra prostatic extension, positive surgical margins, seminal vesicle involvement and tumour stage. RESULTS: In total, 240 RPs were performed with 167 cases graded G7 (70 graded G4 + 3 and 97 graded G3 + 4). Since the introduction of RAPC the proportion of G4 + 3 compared to G3 + 4 has increased from 37.9 to 42%. There was no statistical difference in outcomes for G4 + 3 treated before and after the introduction of RAPC. G4 + 3 was associated with higher rates of BCR (24.4 vs. 0%, p < 0.0001, radiotherapy (41.1 vs. 4.8%, p < 0.0001) and worse histological features than G3 + 4. CONCLUSION: Despite the benefits in diagnosis of prostate cancer brought about by RAPC in Ireland, this has not translated to a lower grade for surgically treated patients. There has been no improvement in outcomes especially for higher grade G4 + 3 disease.


Asunto(s)
Detección Precoz del Cáncer/métodos , Unidades Móviles de Salud/normas , Neoplasias de la Próstata/terapia , Humanos , Masculino , Persona de Mediana Edad , Neoplasias de la Próstata/diagnóstico , Neoplasias de la Próstata/patología , Estudios Retrospectivos , Resultado del Tratamiento
2.
Eur J Radiol ; 84(6): 1019-22, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25795196

RESUMEN

OBJECTIVES: Prostate cancer staging MR examinations commonly include abdominal sequences to assess for non-regional (common iliac or para-aortic) nodal metastasis. In our experience the diagnostic yield of this is limited, but incidental findings are frequent, often necessitating further investigations. The aim of this study is to assess the diagnostic utility of abdominal sequences in routine prostate cancer MR staging studies. METHODS: Findings on abdominal sequences of consecutive MRI prostate studies performed for staging newly diagnosed prostate cancer between September 2011 and September 2013 were reviewed with respect to adenopathy and additional incidental findings. Results were correlated with Gleason grade and serum prostate-specific antigen (PSA) level in each case. RESULTS: 355 MRI prostate examinations were reviewed. 4 (1.1%) showed enlarged non-regional lymph nodes. Incidental findings were found in 82(23.1%) cases, neccessitating further investigation in 45 (12.7%) cases. Enlarged non-regional nodes were associated with higher PSA level and Gleason grade (p=0.007, p=0.005 respectively). With a combined threshold of PSA > 20 ng/mL and/or Gleason grade ≥ 8 the sensitivity, specificity, PPV and NPV were 100, 60, 3 and 100% respectively for predicting the presence of non-regional adenopathy. CONCLUSIONS: Routine abdominal sequences are of very low yield in routine prostate cancer MR staging, frequently resulting in incidental findings requiring further work-up and should be reserved for high-risk cases. Our experience supports the use of an abdominal staging sequence in high-risk cases only.


Asunto(s)
Abdomen/patología , Detección Precoz del Cáncer , Hallazgos Incidentales , Imagen por Resonancia Magnética , Neoplasias de la Próstata/patología , Anciano , Humanos , Imagen por Resonancia Magnética/métodos , Masculino , Estadificación de Neoplasias , Examen Físico , Guías de Práctica Clínica como Asunto , Antígeno Prostático Específico/sangre , Sensibilidad y Especificidad
3.
Ir J Med Sci ; 184(3): 685-9, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25740094

RESUMEN

BACKGROUND: Social media is the interaction among people in which they create, share or exchange information and ideas in virtual communities and web-based networks. This year, the Irish Society of Urology (ISU) expanded its involvement in social media with a preregistered Twitter hashtag (#ISU14) for the annual meeting. AIM: The aim of this study was to highlight the use of Twitter at an annual national meeting held in 2014. METHODS: The Symplur healthcare analytics website was used to prospectively examine traffic related to the 2014 ISU Annual Meeting. This feature was used to generate statistics for the number of impressions, unique tweets (excluding retweets) and distinct contributors who used the indexing hashtag #ISU14. Individual tweets were assessed using the conference hashtag on the Twitter website. RESULTS: The total number of attendees at the conference was 119, and 99 individuals participated in Twitter using the conference hashtag (#ISU14). 31 % of attendees participated in tweeting at the conference. Over the course of the conference, a total of 798 unique tweets were generated, creating over 665,000 impressions in cyberspace. 590 (73.9 %) tweets were generated from attendees at the conference, while 26.1 % of tweets were from virtual followers. 702 (87.9 %) tweets were from urologists and 439 (55 %) tweets were of scientific nature. Tweet activity peaked during the guest lectures on both days. CONCLUSION: Twitter use at the ISU has been shown to facilitate interaction between delegates and allows users to follow as well as participate from afar.


Asunto(s)
Blogging , Congresos como Asunto/estadística & datos numéricos , Difusión de la Información , Médicos/estadística & datos numéricos , Medios de Comunicación Sociales/instrumentación , Urología/normas , Comunicación , Humanos , Internet/estadística & datos numéricos , Relaciones Interprofesionales , Irlanda , Investigadores/estadística & datos numéricos
4.
Surgeon ; 13(3): 127-31, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24135285

RESUMEN

INTRODUCTION: Bowel preparation was established as part of the pre-operative course for patients undergoing ileal conduit formation since the late 1970's. Rationales for its use include reduction in infection and wound complications, technically easier anastomosis and earlier return to bowel function. However, recent reports have challenged this practice. Traditionally antibiotics were also administered for several days prior to surgery with the assumption that bacterial load was reduced. Modification of antibiotic protocols resulted from evidence-based findings. Furthermore, publications emphasizing the benefit of Enhanced Recovery Protocols/Programmes (ERP) have become contemporary. METHODS: An online multiple-choice questionnaire (via Monkey Survey) was administered to all consultant urologists in Ireland. This national cross-sectional study evaluated the use of bowel preparation and antibiotic prophylaxis prior to urinary diversion. In addition, we also assessed consultant urologists' awareness of ERP and their views on the introduction and implementation of such a national program. RESULTS: Of the 41 consultant urologists surveyed, 80.4% (n = 33) responded. 63.6% routinely used bowel preparation. Klean Prep was the most commonly used bowel preparation. 80.9% of urologists admit their patient's one-day pre-operatively for bowel preparation, with 87.8% using antibiotic prophylaxis at anesthesia induction, and 18.1% continuing the antibiotics for 24-48 h post-operatively. Although 74% of consultants are aware of ERP, only 66.6% are in favor of their national implementation. CONCLUSION: The majority of Irish urologists use bowel preparation prior to ileal conduit formation. Substantial recent evidence has emerged showing no difference in infective complications or anastomotic leakage when bowel preparation was not used. National guidelines would be beneficial regarding the use of bowel preparation, antibiotic prophylaxis and ERP for urinary diversion surgery.


Asunto(s)
Atención Perioperativa/métodos , Derivación Urinaria , Profilaxis Antibiótica , Catárticos/administración & dosificación , Protocolos Clínicos , Humanos , Irlanda , Encuestas y Cuestionarios
5.
Adv Urol ; 2015: 346812, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26798335

RESUMEN

Radiation cystitis is a recognised complication of pelvic radiotherapy. Incidence of radiation cystitis ranges from 23 to 80% and the incidence of severe haematuria ranges from 5 to 8%. High quality data on management strategies for radiation cystitis is sparse. Treatment modalities are subclassified into systemic therapies, intravesical therapies, and hyperbaric oxygen and interventional procedures. Short-term cure rates range from 76 to 95% for hyperbaric oxygen therapy and interventional procedures. Adverse effects of these treatment strategies are acceptable. Ultimately, most patients require multimodal treatment for curative purposes. Large randomised trials exploring emergent management strategies are required in order to strengthen evidence-based treatment strategies. Urologists encounter radiation cystitis commonly and should be familiar with diagnostic modalities and treatment strategies.

6.
Ir Med J ; 107(2): 50-1, 2014 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-24654485

RESUMEN

Renal artery aneurysms (RAA) are the second most common visceral artery aneurysm. In cases of rupture they pose a significant and emergent surgical challenge. Extracorporeal arterial reconstruction and autotransplantation is often necessary in certain complex cases that are not amenable to aneurysm repair in vivo. We report a case of a 35 year old female with a RAA in a solitary functioning kidney, requiring ex vivo reconstruction and autotransplantation to the iliac vessels.


Asunto(s)
Aneurisma Roto/cirugía , Trasplante de Riñón/métodos , Arteria Renal , Adulto , Aneurisma Roto/diagnóstico por imagen , Angiografía , Femenino , Humanos , Trasplante Autólogo
7.
Surgeon ; 12(6): 301-6, 2014 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-24291308

RESUMEN

OBJECTIVE: To identify the incidence and features of significant incidental findings discussed at our departmental multidisciplinary team meeting (MDM). The improved quality of radiological imaging has resulted in increased rates of incidental findings. Although some may be trivial, many have clinical significance and early diagnosis and treatment may be beneficial. METHODS: A retrospective analysis was performed of all cases discussed at the MDM between January 2012 and February 2013. Cases were divided into two groups--Group 1 consisted of patients whose initial imaging was performed for a urological presentation which resulted in a synchronous finding; Group 2 consisted of patients who were referred with a synchronous urological finding for discussion following investigation of an initial benign urological condition or a non-urological condition. RESULTS: 696 patients were discussed at 53 MDMs. 109 (15.7%) patients had incidental findings. 61 (56%) of these were in Group 1. 16 (26.2%) were synchronous malignant diagnoses, 25 (41%) were benign and 20 (32.8%) were indeterminate. 48 (44%) patients in Group 2 - 40 (83.3%) were renal in origin and 30 (75%) of these proceeded to surgery. The median tumour size was 3.2 cm (Range: 1.2 cm-10 cm). One patient had radio-frequency ablation. Two were referred for palliative care. Seven patients are under ongoing surveillance--the median size of these lesions is 3.6 cm (Range: 2.1 cm-8.3 cm). CONCLUSION: A substantial workload is generated from the investigation of incidental findings discussed at MDM--these now represent the majority of the caseload for renal cancer surgery.


Asunto(s)
Hallazgos Incidentales , Enfermedades Urológicas/diagnóstico , Enfermedades Urológicas/terapia , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Incidencia , Neoplasias Renales/diagnóstico , Neoplasias Renales/terapia , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Tomografía Computarizada por Rayos X
8.
Ir J Med Sci ; 182(3): 487-91, 2013 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23417241

RESUMEN

BACKGROUND: Recent evidence has suggested that the introduction of rapid access prostate cancer programs has led to a more streamlined pathway for patients, and was designed to ultimately reduce referral delays. AIMS: To identify the initial impact of the introduction of the rapid access prostate clinic on Gleason grading within the prostate cancer cohort, as well as the impact of distance from a tertiary referral center on subsequent Gleason grading. METHODS: A prospective database was maintained from those men attended the rapid access prostate clinic in St. Vincent's University Hospital. Data relating to demographics, biopsy results, retrospective PSA readings, and subsequent treatment pathways were all recorded and analyzed. Statistical significance was taken at p<0.05. RESULTS: Prospective data from the rapid access prostate clinic illustrated similar results in patient demographics, Gleason grade and choice of treatment outcomes to other published institutions, however, for the first time demonstrate emerging evidence of the effect of the rapid access prostate clinic leading to a downward shift in Gleason grade over a 2-year period, as well as data showing an inverse correlation between leading Gleason grade and distance from our tertiary referral center. CONCLUSION: These results suggest that the introduction of the rapid access prostate clinic has initially begun to demonstrate an initial downgrading in Gleason scoring patterns. Our data also reflects a poorer Gleason score in those patients living further away from the rapid access prostate clinic. This may be in part attributed to a surge in referrals of those patients previously managed outside a tertiary institution, and suggests that patients should undergo prompt referral following suspicion for prostate cancer.


Asunto(s)
Accesibilidad a los Servicios de Salud/estadística & datos numéricos , Neoplasias de la Próstata/clasificación , Neoplasias de la Próstata/epidemiología , Adulto , Anciano , Hospitales Universitarios/estadística & datos numéricos , Humanos , Irlanda/epidemiología , Masculino , Persona de Mediana Edad , Clasificación del Tumor , Estudios Prospectivos , Neoplasias de la Próstata/patología , Neoplasias de la Próstata/terapia , Derivación y Consulta , Centros de Atención Terciaria/estadística & datos numéricos , Resultado del Tratamiento
9.
Ir J Med Sci ; 181(3): 345-7, 2012 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23030031

RESUMEN

INTRODUCTION: Urethral duplication is a rare congenital anomaly with less than 200 cases reported. It predominantly occurs in males and is nearly always diagnosed in childhood or adolescence. It is defined as a complete second passage from the bladder to the dorsum of the penis or as an accessory pathway that ends blindly on the dorsal or ventral surface. METHODS: We present the case of a 54-year-old patient with incomplete urethral duplication. DISCUSSION: Urethral duplication commonly occurs in the sagittal plane with one urethral channel lying dorsal to the other. Symptoms vary from completely asymptomatic to urinary incontinence which can lead to a mucopurulent discharge from a low grade urinary tract infection. Other symptoms include double stream (most common complaint) and intermittent urinary discharge.


Asunto(s)
Uretra/anomalías , Uretra/diagnóstico por imagen , Humanos , Masculino , Persona de Mediana Edad , Radiografía
10.
Int J Colorectal Dis ; 27(11): 1501-8, 2012 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-22451255

RESUMEN

PURPOSE: Although well described, there is limited published data related to management on the coexistence of prostate and rectal cancer. The aim of this study was to describe a single institution's experience with this and propose a treatment algorithm based on the best available evidence. METHODS: From 2000 to 2011, a retrospective review of institutional databases was performed to identify patients with synchronous prostate and rectal cancers where the rectal cancer lay in the lower two thirds of the rectum. Operative and non-operative outcomes were analysed and a management algorithm is proposed. RESULTS: Twelve patients with prostate and rectal cancer were identified. Three were metachronous diagnoses (>3-month time interval) and nine were synchronous diagnoses. In the synchronous group, four had metastatic disease at presentation and were treated symptomatically, while five were treated with curative intent. Treatment included pelvic radiotherapy (74 Gy) followed by pelvic exenteration (three) and watchful waiting for rectal cancer (one). The remaining patient had a prostatectomy, long-course chemoradiotherapy and anterior resection. There were no operative mortalities and acceptable morbidity. Three remain alive with two patients disease-free. CONCLUSIONS: Synchronous detection of prostate cancer and cancer of the lower two thirds of the rectum is uncommon, but likely to increase with rigorous preoperative staging of rectal cancer and increased awareness of the potential for synchronous disease. Treatment must be individualized based on the stage of the individual cancers taking into account the options for both cancers including EBRT (both), surgery (both), hormonal therapy (prostate), surgery (both) and watchful waiting (both).


Asunto(s)
Neoplasias Primarias Múltiples/terapia , Neoplasias de la Próstata/terapia , Neoplasias del Recto/terapia , Anciano , Anciano de 80 o más Años , Humanos , Masculino , Persona de Mediana Edad , Metástasis de la Neoplasia , Neoplasias Primarias Múltiples/patología , Neoplasias Primarias Secundarias/patología , Neoplasias Primarias Secundarias/terapia , Neoplasias de la Próstata/patología , Neoplasias del Recto/patología , Recto/patología , Estudios Retrospectivos , Resultado del Tratamiento
11.
Ir Med J ; 104(4): 108-11, 2011 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-21675092

RESUMEN

Many centres currently do not offer radical prostatectomy (RP) to men with high-risk localised prostate cancer due to concerns regarding poor outcome, despite evidence to the contrary. We identified 18 men undergoing RP with serum PSA >20 ng/ml (high-risk by National Comprehensive Cancer Network definition) and minimum follow-up of 12 years (mean 13.5). Mean preoperative PSA was 37.0 ng/ml (Range 21.1-94.0). Prostatectomy pathology reported extracapsular disease in 16 (88.9%), positive surgical margins in 15 (83%) and positive pelvic lymph nodes in 5 (27.8%). Overall and cancer-specific survival at 5 and 10-years was 83.3%, 88.2%, 72% and 76.5% respectively. With complete follow-up 11 (61.1%) are alive, and 5 (27.8%) avoided any adjuvant therapy. Complete continence (defined as no involuntary urine leakage and no use of pads) was achieved in 60%, with partial continence in the remainder. We conclude that surgery for this aggressive variant of localised prostate cancer can result in satisfactory outcome.


Asunto(s)
Antígeno Prostático Específico/sangre , Prostatectomía , Neoplasias de la Próstata/cirugía , Anciano , Humanos , Masculino , Persona de Mediana Edad , Neoplasias de la Próstata/sangre , Neoplasias de la Próstata/mortalidad , Tasa de Supervivencia
12.
Ir J Med Sci ; 178(3): 281-5, 2009 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-19367426

RESUMEN

BACKGROUND: Referrals to Urology OPD of men with a likely diagnosis of BPH are common. AIMS: To review referrals to OPD of men with lower urinary tract symptoms (LUTS) to establish how many could have been managed without specialist assessment. METHODS: We reviewed records of 200 male patients referred to OPD with LUTS. We assessed whether the referral source had performed digital rectal examination (DRE), International Prostate Symptom Score (IPSS), Bother Score or PSA level. RESULTS: 74% of patients were referred by GPs. In 31.5% of cases DRE was performed prior to referral. One GP had completed an IPSS, none a Bother Score. 96% had a PSA checked before OPD. Ultimately, 88.5% of our patients were diagnosed with BPH. CONCLUSIONS: With better pre-assessment in the form of DRE, IPSS and Bother Score, allied to a PSA check, many patients with LUTS could be managed in a primary care setting.


Asunto(s)
Medicina/estadística & datos numéricos , Próstata/patología , Neoplasias de la Próstata/diagnóstico , Derivación y Consulta/estadística & datos numéricos , Trastornos Urinarios/epidemiología , Anciano , Indicadores de Salud , Humanos , Irlanda/epidemiología , Masculino , Antígeno Prostático Específico/análisis , Neoplasias de la Próstata/epidemiología , Neoplasias de la Próstata/patología , Investigación Cualitativa , Estudios Retrospectivos , Encuestas y Cuestionarios
13.
Ir Med J ; 101(7): 203-4, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18807808

RESUMEN

Waiting times for appointments for urological out-patients in Ireland and the U.K. can be excessively long. Nurse-led Lower Urinary Tract symptom (LUTs) pre-assessment clinics have been introduced to streamline patient care pathways. We examined whether a nurse-led pre-assessment LUTS clinic could result in the rapid assessment and discharge of patients following their first out-patient visit. A pilot study was undertaken whereby patients referred with LUTS were sent for pre-assessment prior to their out-patients appointment. 214 consecutive patients underwent pre-assessment. Of these, 39 (18%) patients were discharged following their first out-patient visit and 27 (13%) patients were discharged after a second attendance. A further 35 (16%) patients continued to attend but underwent no further investigations or treatment, and possibly should have been discharged earlier. Overall 46% of pre-assessed patients could have been discharged early from the urology clinic. In conclusion a nurse-led pre-assessment LUTS clinic could result in the rapid assessment and discharge of patients following their first out-patient visit.


Asunto(s)
Medicina/estadística & datos numéricos , Diagnóstico de Enfermería , Alta del Paciente/estadística & datos numéricos , Derivación y Consulta , Especialización , Enfermedades Urológicas/diagnóstico , Indicadores de Salud , Humanos , Masculino , Proyectos Piloto , Factores de Tiempo , Enfermedades Urológicas/tratamiento farmacológico , Enfermedades Urológicas/enfermería
14.
Ir J Med Sci ; 176(3): 161-3, 2007 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-17786503

RESUMEN

BACKGROUND: PSA measurement is important in prostate cancer detection. However, applying cut-off values of >4 ng/ml as indication for biopsy misses 20-30% of tumours. AIMS: To determine the number of patients with prostate cancer and normal age-related PSA, referred for TRUS biopsy due to abnormal DRE alone. METHODS: We reviewed patients referred for biopsy over 12 months. Indication for biopsy included abnormal PSA, abnormal DRE, or both. RESULTS: Four-hundred and sixty-five (465) TRUS biopsies were performed, 209 were positive. Of the 183 (183/209) positive on whom complete data were available, 4 (2.2%) had a normal age-related PSA but an abnormal DRE. CONCLUSIONS: Metastatic prostate cancer remains incurable. Therefore detection of organ-confined and potentially curable disease, is crucial. Though PSA has led to earlier detection, this study emphasises the importance of clinical examination, illustrating a normal PSA cannot eliminate the possibility of cancer. DRE and PSA should be interpreted as being collaborative, not competitive.


Asunto(s)
Tacto Rectal , Antígeno Prostático Específico/sangre , Neoplasias de la Próstata/diagnóstico , Adulto , Anciano , Anciano de 80 o más Años , Humanos , Masculino , Persona de Mediana Edad , Próstata/diagnóstico por imagen , Estudios Retrospectivos , Ultrasonografía
16.
Ir J Med Sci ; 173(1): 23-6, 2004.
Artículo en Inglés | MEDLINE | ID: mdl-15732232

RESUMEN

BACKGROUND: Patients with prostate cancer with a pre-operative prostate-specific antigen (PSA) >15 ng/ml who undergo radical retropubic prostatectomy (RRP) generally do not have a good outcome, yet may have organ-confined cancer and should be offered the option of surgery. AIM: To assess the outcome of patients who underwent RRP with a pre-operative PSA >15 ng/ml. METHODS: Thirty-four patients, mean pre-operative PSA: 25.46 ng/ml (15.03-76.6) and mean Gleason score: 6.4 (5-9) were assessed. RESULTS: Two groups were identified. Group I: 41% (14/34) have no biochemical recurrence to mean follow up of 58 months (30-106). Mean PSA: 18.8 ng/ml (15.03-25.84). Mean Gleason score: 6.1 (5-7). Clinical stage: T1c in 80%. No patient had seminal vesicle or lymph node involvement. Group II: 59% (20/34) have biochemical recurrence or died (3) from their disease to mean follow up of 66 months (36-98). Mean PSA: 28.9 ng/ml (15.28-76.6). Mean Gleason score: 6.7 (5-9). Clinical stage: T1c in 25%. Eleven patients had seminal vesicle (8) involvement or positive lymph nodes (3) or both (2). CONCLUSION: RRP seems feasible in patients whose pre-operative PSA is between 15 and 25 ng/ml with stage T1c, Gleason score < or = 7 and negative lymph node frozen section.


Asunto(s)
Adenocarcinoma/cirugía , Antígeno Prostático Específico/sangre , Prostatectomía , Neoplasias de la Próstata/cirugía , Adenocarcinoma/sangre , Adenocarcinoma/patología , Humanos , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/sangre , Selección de Paciente , Neoplasias de la Próstata/sangre , Neoplasias de la Próstata/patología , Valores de Referencia , Resultado del Tratamiento
18.
Biol Psychiatry ; 49(6): 500-9, 2001 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-11257235

RESUMEN

BACKGROUND: A previous neural network simulation suggested that manic states arise from excessive levels of noise that destabilize neural representations. The Necker cube stick figure provides a simple perceptual task that assesses stability of gestalt-type representations. METHODS: A neural network was developed that included a simulation of the Necker cube task. Noise was added to induce maniclike jumps from one representation to another. A parallel study of Necker cube perception was conducted with 16 patients diagnosed with manic-spectrum disorder, 18 patients with schizophrenia, and 19 normal control subjects. Cognitive speed and rate of indiscriminate responses were assessed using an auditory continuous performance task. RESULTS: During processing of the "Necker cube" stimulus, the reversal rate of the noise-destabilized "manic" network was increased by 30%. In the human subject study, the median score of Necker cube reversal rates for manic-spectrum patients was roughly twice that of normal control subjects and patients with schizophrenia. Accelerated reversal rates in the manic-spectrum group were not attributable to excessive cognitive speed or higher rates of indiscriminate responses. CONCLUSIONS: The two studies, considered together, support the hypothesis that excessive cortical noise destabilizes neural representations in manic-spectrum patients.


Asunto(s)
Trastorno Bipolar/fisiopatología , Simulación por Computador , Modelos Biológicos , Red Nerviosa/fisiopatología , Redes Neurales de la Computación , Adulto , Trastorno Bipolar/complicaciones , Trastornos del Conocimiento/diagnóstico , Trastornos del Conocimiento/etiología , Femenino , Humanos , Masculino , Pruebas Neuropsicológicas , Trastornos Psicomotores/diagnóstico , Trastornos Psicomotores/etiología , Esquizofrenia/complicaciones , Esquizofrenia/fisiopatología
19.
Ir J Med Sci ; 169(2): 119-21, 2000.
Artículo en Inglés | MEDLINE | ID: mdl-11006667

RESUMEN

BACKGROUND: Extracorporeal shock-wave lithotripsy (ESWL) is a relatively new technological adjunct in the treatment of renal calculi, but availability is limited. AIM: The aim of this study was to assess the outcome of ureteroscopic procedures in a unit without on-site ESWL facility. METHODS: A retrospective study of all cases of ureteric calculi presenting to this hospital during the period 1991 to 1997 was performed. RESULTS: One hundred and thirty five patients with a mean age of 46.8 years were evaluated. Ninety-four (69.5%) had their stone successfully manipulated and/or extracted at ureteroscopy. Using strict criteria, 41 patients (30.5%) had failed ureteroscopies. Fourteen (10.4%) suffered complications related to their ureteroscopy, thirteen had their complications treated conservatively and three (2.3%) needed open procedures. CONCLUSION: Ureteroscopy has a high success rate and low morbidity. We continue to advocate ureteroscopy in the initial management of ureteric calculi.


Asunto(s)
Cálculos Ureterales/cirugía , Ureteroscopía , Humanos , Persona de Mediana Edad , Estudios Retrospectivos , Stents
20.
Am J Psychiatry ; 156(10): 1522-8, 1999 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-10518161

RESUMEN

OBJECTIVE: The authors investigated the concurrent and predictive validity of the DSM-III-R diagnosis of personality disorder in adolescents by means of baseline and follow-up assessments of inpatients treated at the Yale Psychiatric Institute. METHOD: One hundred sixty-five hospitalized adolescents were reliably assessed by using a structured interview for personality disorder diagnoses as well as two measures of impairment and distress--the Global Assessment of Functioning Scale and the SCL-90-R. Two years after initial assessment, 101 subjects were independently reassessed with the same measures; their functioning was also assessed at this time. RESULTS: At baseline, adolescents with personality disorders were significantly more impaired than those without personality disorders. At follow-up, adolescents with a personality disorder diagnosis at baseline had used significantly more drugs and had required more inpatient treatment during the follow-up interval. Over time, the scores on the Global Assessment of Functioning Scale and SCL-90-R of adolescents diagnosed with a personality disorder at baseline became more similar to the scores of adolescents without a personality disorder. CONCLUSIONS: The diagnosis of personality disorder in adolescent inpatients has good concurrent validity; however, the predictive validity of the diagnosis is mixed.


Asunto(s)
Hospitalización , Trastornos de la Personalidad/diagnóstico , Escalas de Valoración Psiquiátrica/estadística & datos numéricos , Adolescente , Factores de Edad , Análisis de Varianza , Niño , Diagnóstico Diferencial , Femenino , Estudios de Seguimiento , Humanos , Masculino , Trastornos Mentales/diagnóstico , Valor Predictivo de las Pruebas , Psicometría , Reproducibilidad de los Resultados , Proyectos de Investigación
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