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1.
Ir J Med Sci ; 186(3): 583-588, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28281040

RESUMO

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.


Assuntos
Detecção Precoce de Câncer/métodos , Unidades Móveis de Saúde/normas , Neoplasias da Próstata/terapia , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias da Próstata/diagnóstico , Neoplasias da Próstata/patologia , Estudos Retrospectivos , Resultado do Tratamento
2.
Ir J Med Sci ; 184(3): 685-9, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25740094

RESUMO

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.


Assuntos
Blogging , Congressos como Assunto/estatística & dados numéricos , Disseminação de Informação , Médicos/estatística & dados numéricos , Mídias Sociais/instrumentação , Urologia/normas , Comunicação , Humanos , Internet/estatística & dados numéricos , Relações Interprofissionais , Irlanda , Pesquisadores/estatística & dados numéricos
3.
Eur J Radiol ; 84(6): 1019-22, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25795196

RESUMO

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.


Assuntos
Abdome/patologia , Detecção Precoce de Câncer , Achados Incidentais , Imageamento por Ressonância Magnética , Neoplasias da Próstata/patologia , Idoso , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Estadiamento de Neoplasias , Exame Físico , Guias de Prática Clínica como Assunto , Antígeno Prostático Específico/sangue , Sensibilidade e Especificidade
4.
Adv Urol ; 2015: 346812, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26798335

RESUMO

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.

5.
Surgeon ; 13(3): 127-31, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24135285

RESUMO

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.


Assuntos
Assistência Perioperatória/métodos , Derivação Urinária , Antibioticoprofilaxia , Catárticos/administração & dosagem , Protocolos Clínicos , Humanos , Irlanda , Inquéritos e Questionários
6.
Ir Med J ; 107(2): 50-1, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24654485

RESUMO

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.


Assuntos
Aneurisma Roto/cirurgia , Transplante de Rim/métodos , Artéria Renal , Adulto , Aneurisma Roto/diagnóstico por imagem , Angiografia , Feminino , Humanos , Transplante Autólogo
7.
Surgeon ; 12(6): 301-6, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24291308

RESUMO

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.


Assuntos
Achados Incidentais , Doenças Urológicas/diagnóstico , Doenças Urológicas/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Incidência , Neoplasias Renais/diagnóstico , Neoplasias Renais/terapia , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Tomografia Computadorizada por Raios X
8.
Ir J Med Sci ; 182(3): 487-91, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23417241

RESUMO

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.


Assuntos
Acessibilidade aos Serviços de Saúde/estatística & dados numéricos , Neoplasias da Próstata/classificação , Neoplasias da Próstata/epidemiologia , Adulto , Idoso , Hospitais Universitários/estatística & dados numéricos , Humanos , Irlanda/epidemiologia , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Estudos Prospectivos , Neoplasias da Próstata/patologia , Neoplasias da Próstata/terapia , Encaminhamento e Consulta , Centros de Atenção Terciária/estatística & dados numéricos , Resultado do Tratamento
9.
Ir J Med Sci ; 181(3): 345-7, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23030031

RESUMO

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.


Assuntos
Uretra/anormalidades , Uretra/diagnóstico por imagem , Humanos , Masculino , Pessoa de Meia-Idade , Radiografia
10.
Int J Colorectal Dis ; 27(11): 1501-8, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22451255

RESUMO

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).


Assuntos
Neoplasias Primárias Múltiplas/terapia , Neoplasias da Próstata/terapia , Neoplasias Retais/terapia , Idoso , Idoso de 80 Anos ou mais , Humanos , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Neoplasias Primárias Múltiplas/patologia , Segunda Neoplasia Primária/patologia , Segunda Neoplasia Primária/terapia , Neoplasias da Próstata/patologia , Neoplasias Retais/patologia , Reto/patologia , Estudos Retrospectivos , Resultado do Tratamento
11.
Ir Med J ; 104(4): 108-11, 2011 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-21675092

RESUMO

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.


Assuntos
Antígeno Prostático Específico/sangue , Prostatectomia , Neoplasias da Próstata/cirurgia , Idoso , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias da Próstata/sangue , Neoplasias da Próstata/mortalidade , Taxa de Sobrevida
12.
Ir J Med Sci ; 178(3): 281-5, 2009 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-19367426

RESUMO

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.


Assuntos
Medicina/estatística & dados numéricos , Próstata/patologia , Neoplasias da Próstata/diagnóstico , Encaminhamento e Consulta/estatística & dados numéricos , Transtornos Urinários/epidemiologia , Idoso , Indicadores Básicos de Saúde , Humanos , Irlanda/epidemiologia , Masculino , Antígeno Prostático Específico/análise , Neoplasias da Próstata/epidemiologia , Neoplasias da Próstata/patologia , Pesquisa Qualitativa , Estudos Retrospectivos , Inquéritos e Questionários
13.
Ir Med J ; 101(7): 203-4, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18807808

RESUMO

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.


Assuntos
Medicina/estatística & dados numéricos , Diagnóstico de Enfermagem , Alta do Paciente/estatística & dados numéricos , Encaminhamento e Consulta , Especialização , Doenças Urológicas/diagnóstico , Indicadores Básicos de Saúde , Humanos , Masculino , Projetos Piloto , Fatores de Tempo , Doenças Urológicas/tratamento farmacológico , Doenças Urológicas/enfermagem
14.
Ir J Med Sci ; 176(3): 161-3, 2007 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-17786503

RESUMO

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.


Assuntos
Exame Retal Digital , Antígeno Prostático Específico/sangue , Neoplasias da Próstata/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Humanos , Masculino , Pessoa de Meia-Idade , Próstata/diagnóstico por imagem , Estudos Retrospectivos , Ultrassonografia
16.
Ir J Med Sci ; 173(1): 23-6, 2004.
Artigo em Inglês | MEDLINE | ID: mdl-15732232

RESUMO

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.


Assuntos
Adenocarcinoma/cirurgia , Antígeno Prostático Específico/sangue , Prostatectomia , Neoplasias da Próstata/cirurgia , Adenocarcinoma/sangue , Adenocarcinoma/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/sangue , Seleção de Pacientes , Neoplasias da Próstata/sangue , Neoplasias da Próstata/patologia , Valores de Referência , Resultado do Tratamento
18.
Biol Psychiatry ; 49(6): 500-9, 2001 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-11257235

RESUMO

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.


Assuntos
Transtorno Bipolar/fisiopatologia , Simulação por Computador , Modelos Biológicos , Rede Nervosa/fisiopatologia , Redes Neurais de Computação , Adulto , Transtorno Bipolar/complicações , Transtornos Cognitivos/diagnóstico , Transtornos Cognitivos/etiologia , Feminino , Humanos , Masculino , Testes Neuropsicológicos , Transtornos Psicomotores/diagnóstico , Transtornos Psicomotores/etiologia , Esquizofrenia/complicações , Esquizofrenia/fisiopatologia
19.
Ir J Med Sci ; 169(2): 119-21, 2000.
Artigo em Inglês | MEDLINE | ID: mdl-11006667

RESUMO

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.


Assuntos
Cálculos Ureterais/cirurgia , Ureteroscopia , Humanos , Pessoa de Meia-Idade , Estudos Retrospectivos , Stents
20.
Am J Psychiatry ; 156(10): 1522-8, 1999 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-10518161

RESUMO

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.


Assuntos
Hospitalização , Transtornos da Personalidade/diagnóstico , Escalas de Graduação Psiquiátrica/estatística & dados numéricos , Adolescente , Fatores Etários , Análise de Variância , Criança , Diagnóstico Diferencial , Feminino , Seguimentos , Humanos , Masculino , Transtornos Mentais/diagnóstico , Valor Preditivo dos Testes , Psicometria , Reprodutibilidade dos Testes , Projetos de Pesquisa
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