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1.
BJU Int ; 113(1): 56-64, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24053685

RESUMO

OBJECTIVES: To assess oncological (biochemical and histological recurrence) and functional (urinary and potency) outcomes in patients with unilateral low-risk organ-confined prostate cancer (PCa) treated with focal cryoablation (FC). PATIENTS AND METHODS: From January 2009 to March 2012, patients with localized PCa who refused active surveillance were assigned to a FC protocol. This was a prospective, single-arm cohort study. Inclusion criteria were: unilateral disease, clinical stage T1c to T2a, prostate-specific antigen (PSA) concentration <10 ng/mL, low volume index lesion and Gleason score ≤6 (3+3). Hemi-ablation was carried out using the Precise(TM) cryoablation system (Galil Medical, Inc., Arden Hills, MN, USA). Oncological (PSA values) and functional (International Prostate Symptom Score and International Index of Erectile Function (IIEF)-5 score) outcomes were analysed at 3-, 6- and 12-month follow-up. The primary endpoint for oncological efficacy, no cancer in ipsilateral side, was based on the 12-month mandatory biopsy. RESULTS: A total of 48 consecutive patients with a mean age of 67 years were included. The median (interquartile range) follow-up was 13.2 (7.4-26.5) months. Follow-up prostate biopsies were negative for the treated lobe in 86% of patients. The mean PSA concentration dropped significantly at 3 months (by 55%) but did not correlate well with positive biopsy results. Urinary symptoms were unchanged. A slight decrease in the IIEF-5 score was present at 3 months, but did not differ significantly from baseline at 6-month follow-up. There were 15% grade 1 and 4% grade 2 complications (Clavien classification). CONCLUSIONS: Focal cryoablation is a low-morbidity option in selected patients with low-risk PCa. We showed PSA concentration to be an unreliable marker for monitoring FC and recommend a protocol of mandatory biopsies for follow-up. A multicentre randomized controlled trial is necessary to confirm the low-morbidity and the biopsy-proven PCa cure rates.


Assuntos
Criocirurgia , Recidiva Local de Neoplasia/cirurgia , Próstata/patologia , Neoplasias da Próstata/cirurgia , Idoso , Biomarcadores Tumorais/sangue , Estudos de Coortes , Criocirurgia/efeitos adversos , Criocirurgia/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Recidiva Local de Neoplasia/mortalidade , Recidiva Local de Neoplasia/patologia , Ereção Peniana , Estudos Prospectivos , Antígeno Prostático Específico/sangue , Neoplasias da Próstata/mortalidade , Neoplasias da Próstata/patologia , Neoplasias da Próstata/fisiopatologia , Taxa de Sobrevida , Resultado do Tratamento , Micção
2.
Stapp Car Crash J ; 58: 197-211, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26192955

RESUMO

In the ECE 127 Regulation on pedestrian leg protection, as well as in the Euro NCAP test protocol, a legform impactor hits the vehicle at the speed of 40 kph. In these tests, the knee is fully extended and the leg is not coupled to the upper body. However, the typical configuration of a pedestrian impact differs since the knee is flexed during most of the gait cycle and the hip joint applies an unknown force to the femur. This study aimed at investigating the influence of the inertia of the upper body (modelled using an upper body mass fixed at the proximal end of the femur) and the initial knee flexion angle on the lower limb injury outcome. In total, 18 tests were conducted on 18 legs from 9 Post Mortem Human Subjects (PMHS). The principle of these tests was to impact the leg at 40 kph using a sled equipped with 3 crushing steel tubes, the stiffness of which were representative of the front face of a European sedan (bonnet leading edge, bumper and spoiler). The mass of the equipped sled was 74.5 kg. The test matrix was designed to perform 4 tests in 4 configurations combining two upper body masses (either 0 or 3 kg) and two knee angles (0 or 20 degrees) at 40 kph (11 m/s) plus 2 tests at 9 m/s. Autopsies were performed on the lower limbs and an injury assessment was established. The findings of this study were first that the increase of the upper body mass resulted in more severe injuries, second that an initial flexion of the knee, corresponding to its natural position during the gait cycle, decreased the severity of the injuries, and third that based on the injury outcome, a test conducted with no upper body mass and the knee fully extended was as severe as a test conducted with a 3 kg upper body mass and an initial knee flexion of 20°.


Assuntos
Acidentes de Trânsito , Peso Corporal/fisiologia , Articulação do Quadril/fisiologia , Postura/fisiologia , Caminhada/lesões , Ferimentos e Lesões , Automóveis , Fenômenos Biomecânicos/fisiologia , Humanos , Medição de Risco , Índices de Gravidade do Trauma , Ferimentos e Lesões/etiologia , Ferimentos e Lesões/fisiopatologia , Ferimentos e Lesões/prevenção & controle
3.
Brachytherapy ; 12(4): 331-7, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23601349

RESUMO

PURPOSE: To evaluate the feasibility and the early toxicity of focal brachytherapy in highly selected localized prostate cancer patients. METHODS AND MATERIALS: Twenty-one patients underwent a focal brachytherapy between February 2010 and March 2012, representing 3.7% of the cases treated by our group during this period. Patient selection was based on (at least) two series of prostate biopsies and a high-resolution MRI. Only patients with very limited and localized tumors, according to strict criteria, were selected for the procedure. The technique used a real-time procedure with the implantation of free (125)I seeds and dynamic dose calculation. The prescribed dose for the focal volume was 145Gy. RESULTS: The treated volume corresponded to a mean value of 34% of the total prostatic volume (range, 20-48%). For the focal volume, the mean D90 and V100 was 183.2Gy (range, 176-188Gy) and 99.3% (range, 98.8-100%), respectively. The technique was performed in an hour and a half. When compared with a previous cohort treated by whole-prostate brachytherapy, urinary toxicity (International Prostate Symptom Score) was borderline reduced (p = 0.04) at 6 months only, whereas the recovery of the International Index of Erectile Function 5 was better (p = 0.014). The International Continence Score was nil in almost all cases as well as rectal toxicity. CONCLUSION: Focal treatment by brachytherapy is easily feasible with little acute toxicity. Further investigation is needed to assess the results in terms of tumor control and long-term toxicity.


Assuntos
Braquiterapia/métodos , Neoplasias da Próstata/radioterapia , Idoso , Braquiterapia/efeitos adversos , Humanos , Radioisótopos do Iodo , Masculino , Pessoa de Meia-Idade , Seleção de Pacientes , Projetos Piloto , Antígeno Prostático Específico , Dosagem Radioterapêutica
4.
Can J Urol ; 19(4): 6328-35, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22892254

RESUMO

INTRODUCTION: To evaluate erectile function among men who had undergone laparoscopic radical prostatectomy and received postoperative medical therapy for erectile dysfunction. MATERIALS AND METHODS: We performed a prospective study in men who underwent laparoscopic radical prostatectomy between September 2003 and November 2005 at our center and who received penile rehabilitation after surgery. All patients had antegrade interfascial dissection. They received 10 mg tadalafil on the fifth postoperative day and continued to receive it every other day, regardless of erectile function. Intracavernous injection of alprostadil was initiated at 3 or 6 months depending on response to treatment with tadalafil. Follow up evaluations were done at 3, 6, 12, 18 and 24 months. Oncologic and functional outcomes and compliance were assessed. Patients filled in International Index of Erectile Function-5 (IIEF-5) questionnaires. RESULTS: Of 1078 men who underwent laparoscopic radical prostatectomy during this time, 586 patients met inclusion criteria, complied with the study medication, and had complete data for 24 months. The patients had a median preoperative baseline IIEF-5 score of 22. A total of 150 patients (26%) underwent unilateral nerve-sparing surgery, while 436 patients (74%) had bilateral nerve-sparing surgery. At 24 months, 35% of patients who underwent unilateral nerve-sparing surgery and 68% of patients who underwent bilateral nerve-sparing surgery reported having sufficient erectile function for intercourse without using intracavernous injection of alprostadil. At 24 months after surgery, the median IIEF-5 score was 13 (1-25) for the whole cohort, 5 (1-25) for patients who had undergone unilateral nerve-sparing surgery, and 15 (1-25) for patients who had undergone bilateral nerve-sparing surgery. CONCLUSIONS: The findings suggest that adequate patient selection and postoperative medical intervention allows the preservation or recovery of erectile function after laparoscopic radical prostatectomy. Inaccurate selection of patients and postoperative assessment might explain inferior erectile function results following this surgery.


Assuntos
Disfunção Erétil/prevenção & controle , Tratamentos com Preservação do Órgão , Ereção Peniana , Próstata/inervação , Prostatectomia/efeitos adversos , Neoplasias da Próstata/cirurgia , Adulto , Idoso , Alprostadil/administração & dosagem , Carbolinas/uso terapêutico , Coito , Disfunção Erétil/etiologia , Humanos , Laparoscopia/efeitos adversos , Masculino , Adesão à Medicação , Pessoa de Meia-Idade , Orgasmo , Nervos Periféricos , Inibidores da Fosfodiesterase 5/uso terapêutico , Cuidados Pós-Operatórios , Próstata/cirurgia , Prostatectomia/métodos , Índice de Gravidade de Doença , Inquéritos e Questionários , Tadalafila , Vasodilatadores/administração & dosagem
5.
Urology ; 80(3): 656-60, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22770616

RESUMO

OBJECTIVE: To evaluate the pathologic features of surgical specimens after radical prostatectomy in patients with low-risk prostate cancer fulfilling the strictest pathologic selection criteria for active surveillance. METHODS: Retrospective analysis of 10 785 consecutive radical prostatectomy performed in 10 university hospitals (January 2003 through December 2008). A total of 919 patients fulfilled the following unique and very stringent criteria: T1c, prostate-specific antigen (PSA) <10 ng/mL, a single positive biopsy, tumor length <3 mm, and Gleason score <7. Clinico-biologic and pathologic data at diagnosis and after radical prostatectomy, prostatic and tumor volume, pathologic Gleason score and stage, positive surgical margins, insignificant prostate cancer, and PSA outcomes were recorded. RESULTS: Median age was 63 years. Mean prebiopsy PSA level was 6.2 ng/mL. At radical prostatectomy, Gleason score was upgraded in 34% of patients, including 1.2% Gleason score 8-9. Pathologic stages were pT2 in 87.3%, pT3 in 11.1%, and pT4 in 1.4% of cases. Extraprostatic extension was found in 12.5%. Only 26% of patients had "insignificant" tumors. Biochemical recurrence-free survival at 5 years was 92.3%. There was no significant difference in survival between patients with "significant" and "insignificant" tumors (90.1% vs 93.4%; P = .06). CONCLUSION: Despite of a stringent selection of patients with low-risk prostate cancer, active surveillance definition included a significant proportion of patients with upstaged (about 12%) and upgraded (about one-third) disease at diagnosis. Only a quarter of active surveillance patients have a pathologically confirmed "insignificant" cancer.


Assuntos
Seleção de Pacientes , Prostatectomia , Neoplasias da Próstata/patologia , Neoplasias da Próstata/cirurgia , Conduta Expectante , Idoso , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
6.
Stapp Car Crash J ; 56: 411-42, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23625568

RESUMO

This study focused on a better understanding and characterization of the submarining phenomenon that occurs in frontal crashes when the lap belt slides over the anterior superi or iliac spine. Submarining is the consequence of the pelvis kinematics relative to the lap belt, driven by the equilibrium of forces and moments applied to the pelvis. The study had two primary purposes; the first was to provide new PMHS data in submarining test configurations, the second was to investigate the Hybrid II and Hybrid III dummies biofidelity regarding submarining. Several Post Mortem Human Subject (PMHS) studies have been published on this subject. However, the lack of information about the occupant initial positioning and the use of car seats make it difficult to reconstruct these tests. Furthermore, the two dummies are rarely compared to PMHS in submarining test configurations. A fifteen frontal sled test campaign was carried out on two Anthropomorphic Test Devices (ATDs) and nine PMHS. The test environment was designed to be reproducible. It consisted of a rigid seat, a 2-poi nts shoulder belt and a 2-points lap belt instrumented to record their 3D forces at anchorage. The subjects were instrumented with angular sensors at the sacrum, T1 and T12 levels to record their initial angles. Kinematics was measured at these three levels by means of three accelerometers and angular velocity sensors. A PMHS positioning procedure was developed to ensure repeatability. A pre-test was performed on each subject to characterize its lumbar spine static behavior. All the subjects were CT-scanned from head to toe prior to the test. The campaign was divided into three test configurations leading to different surrogates' interaction with the environment and different kinematics. This resulted in a wider range of behaviors for the dummies evaluation. The deceleration pulse, initial lap belt angle, lap belt slack, seat pan angle and footrest position varied. The Hybrid II and Hybrid III dummies and three PMHS were tested in each configuration. Forces and kinematics time history corridors based on the PMHS responses are provided for each configuration. The dummies' responses are evaluated against these targets. For the first configuration (40 km/h), the peak lap belt tension for both sides was between 3,000 N and 6,385 N for the three PMHS while it was around 4,700 N and 6,200 N in average for Hybrid II and Hybrid III respectively. The maximum pelvic rotation ranged from 41° to 80° for the PMHS and reached approximately 45° for the two dummies. For the other two configurations (50 km/h), the peak lap belt tension varied from 3,660 N to 7,180 N for the PMHS and was between 5,400 N and 6,100 N for Hybrid II and between 7,145 N and 7,900 N for Hybrid III. The maximum pelvic rotation ranged from 43° to 73° for the PMHS, while it reached approximately 54° and 46° for Hybrid II and Hybrid III respectively.


Assuntos
Aceleração/efeitos adversos , Acidentes de Trânsito , Vértebras Lombares/lesões , Manequins , Pelve/lesões , Cintos de Segurança/efeitos adversos , Fenômenos Biomecânicos , Cadáver , Humanos
7.
Int Braz J Urol ; 37(2): 213-9; discussion 220-2, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21557838

RESUMO

PURPOSE: To evaluate the long-term efficacy of prostate cancer control and complication rates, in the elderly, after focal therapy with high-intensity focused ultrasound (HIFU). MATERIALS AND METHODS: Between June 1997 and March 2000, patients with localized prostate cancer were included into a focal therapy protocol. Inclusion criteria were: PSA ≤ 10 ng/mL, ≤ 3 positive biopsies with only 1 lobe involved, clinical stage ≤ T2a, Gleason score ≤ 7 (3+4), negative CT scan and bone scan. Hemi-ablation of the prostate was performed with the Ablatherm® device. Survival, complication rates and urinary continence were evaluated. Control biopsies were performed at 1 year. Treatment failure was defined as a positive biopsy or need for salvage therapy. RESULTS: Twelve patients with a mean age 70 years were included. Median follow-up was 10 years. Control prostate biopsies were negative in 11/12 (91%) patients. Overall survival was 83% (10/12) and cancer specific survival was 100% at 10 years. Two patients died from other causes. Recurrence free survival was 90% (95% CI; 0.71-1) at 5 years, and 38% (95% CI; 0.04-0.73) at 10 years. Five patients had salvage therapy with repeat HIFU (n = 1) or hormonal therapy (n = 4) and all salvage patients were alive at 10 years. No patients developed lymph node or bone metastasis. No patients suffered from urinary incontinence. International Prostate Symptom Score was stable at 1 year. Complications included two urinary tract infections and one episode of acute urinary retention. CONCLUSIONS: Hemi-prostate ablation with HIFU can be safely performed in selected elderly patients with adequate long-term cancer control and low complication rates. Results from larger prospective studies using improved imaging techniques and extensive biopsy protocols are awaited.


Assuntos
Neoplasias da Próstata/terapia , Ultrassom Focalizado Transretal de Alta Intensidade , Idoso , Idoso de 80 Anos ou mais , Estudos de Viabilidade , Seguimentos , Humanos , Masculino , Recidiva Local de Neoplasia , Antígeno Prostático Específico/sangue , Estudos Retrospectivos , Resultado do Tratamento
8.
Int. braz. j. urol ; 37(2): 213-222, Mar.-Apr. 2011. graf, tab
Artigo em Inglês | LILACS | ID: lil-588994

RESUMO

PURPOSE: To evaluate the long-term efficacy of prostate cancer control and complication rates, in the elderly, after focal therapy with high-intensity focused ultrasound (HIFU). MATERIALS AND METHODS: Between June 1997 and March 2000, patients with localized prostate cancer were included into a focal therapy protocol. Inclusion criteria were: PSA < 10 ng/mL, < 3 positive biopsies with only 1 lobe involved, clinical stage < T2a, Gleason score < 7 (3+4), negative CT scan and bone scan. Hemi-ablation of the prostate was performed with the Ablatherm(R) device. Survival, complication rates and urinary continence were evaluated. Control biopsies were performed at 1 year. Treatment failure was defined as a positive biopsy or need for salvage therapy. RESULTS: Twelve patients with a mean age 70 years were included. Median follow-up was 10 years. Control prostate biopsies were negative in 11/12 (91 percent) patients. Overall survival was 83 percent (10/12) and cancer specific survival was 100 percent at 10 years. Two patients died from other causes. Recurrence free survival was 90 percent (95 percent CI; 0.71-1) at 5 years, and 38 percent (95 percent CI; 0.04-0.73) at 10 years. Five patients had salvage therapy with repeat HIFU (n = 1) or hormonal therapy (n = 4) and all salvage patients were alive at 10 years. No patients developed lymph node or bone metastasis. No patients suffered from urinary incontinence. International Prostate Symptom Score was stable at 1 year. Complications included two urinary tract infections and one episode of acute urinary retention. CONCLUSIONS: Hemi-prostate ablation with HIFU can be safely performed in selected elderly patients with adequate long-term cancer control and low complication rates. Results from larger prospective studies using improved imaging techniques and extensive biopsy protocols are awaited.


Assuntos
Idoso , Idoso de 80 Anos ou mais , Humanos , Masculino , Neoplasias da Próstata/terapia , Ultrassom Focalizado Transretal de Alta Intensidade , Estudos de Viabilidade , Seguimentos , Recidiva Local de Neoplasia , Antígeno Prostático Específico/sangue , Estudos Retrospectivos , Resultado do Tratamento
9.
BJU Int ; 108(7): 1174-8, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21392221

RESUMO

OBJECTIVE: • To review and compare the rate, location and size of positive surgical margins (PSMs) after pure laparoscopic radical prostatectomy (LRP) and robot-assisted laparoscopic radical prostatectomy (RALP). PATIENTS AND METHODS: • The study comprised 200 patients who underwent RALP and 200 patients who underwent LRP up to January 2008. • We compared patient age, body mass index, preoperative prostate-specific antigen (PSA), preoperative stage and grade, prostate size, pathological stage and grade and neurovascular bundle preservation, as well as PSM rate, size and location. • Continuous and categorical data were compared using Student's t-test and Pearson's chi-squared test. • Multivariate regression analyses were used to identify preoperative and intraoperative predictors of PSMs. RESULTS: • Although the PSM rate was similar between the two groups (LRP: 12% vs RALP: 13.5%; P = 0.76), location and size were not. PSMs after LRP were mostly at the apex (58.3%; P = 0.038), while most PSMs after RALP were posterolateral ([PL] 48%; P = 0.046). • In addition, the median margin size after RALP was significantly smaller than after LRP (RALP: 2 mm vs LRP: 3.5 mm; P = 0.041). • In univariate and multivariate analyses, tumour-node-metastasis (TNM) stage and preoperative PSA were the only independent preoperative predictors of PSMs (P = 0.044 and P = 0.01, respectively). CONCLUSION: • The PSM risk is dependent on TNM stage and preoperative PSA and not the surgical technique, when comparing LRP with RALP.


Assuntos
Laparoscopia , Prostatectomia/métodos , Neoplasias da Próstata/patologia , Neoplasias da Próstata/cirurgia , Robótica , Adulto , Idoso , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
10.
Can J Urol ; 18(1): 5501-3, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21333040
11.
Brachytherapy ; 10(1): 29-34, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21251622

RESUMO

INTRODUCTION: Patients with prominent median lobe hyperplasia and/or high International Prostate Symptom Score (IPSS) are often contraindicated for prostate brachytherapy, mainly because of the risk of post-implant urinary retention. We evaluated an approach combining in the same operative step a limited transurethral resection (TURP) of the median lobe, immediately followed by permanent implant-free seed brachytherapy. METHODS AND MATERIALS: From January 2007 to November 2008, 22 patients underwent a customized limited TURP of their median lobe immediately before brachytherapy. All patients fulfilled our criteria for permanent implant brachytherapy, but presented with a more or less prominent median lobe and/or a high IPSS. RESULTS: The procedure appeared to be technically feasible, with only 0.3% of migrating seeds, a mean post-implant D90 of 173.4 Gy and a mean post-implant V100 of 96.6%. However, 5 patients (23%) experienced a urinary retention, with two patients having to undergo a complementary post-implant TURP. Moreover, urinary toxicity was more pronounced than in our current experience, with high IPSS at 2 months (mean 19.2) and 6 months (mean 15.8). CONCLUSION: Although technically feasible, with relatively few migrating seeds and satisfactory post-implant dosimetric parameters, one-step TURP and brachytherapy was found to be poorly tolerated, with higher than usual urinary retention and urinary toxicity rates. Considering those results, our group is presently evaluating a two-step procedure, with a customized TURP followed after 4-6 months by brachytherapy.


Assuntos
Braquiterapia/métodos , Neoplasias da Próstata/radioterapia , Neoplasias da Próstata/cirurgia , Ressecção Transuretral da Próstata/métodos , Idoso , Braquiterapia/efeitos adversos , Humanos , Masculino , Pessoa de Meia-Idade , Dosagem Radioterapêutica , Radioterapia Adjuvante , Ressecção Transuretral da Próstata/efeitos adversos
12.
Stapp Car Crash J ; 55: 91-115, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22869306

RESUMO

Occupant protection in rear impact involves two competing challenges. On one hand, allowing a deformation of the seat would act as an energy absorber in low severity impacts and would consequently decrease the risk of neck injuries. However, on the other hand, large deformations of the seat may increase the likelihood of occupant ejection in high severity cases. Green et al. 1987 analyzed a total of 919 accidents in Great Britain. They found that occupant ejection resulted in a risk of severe injuries and fatalities between 3.6 and 4.5 times higher than those cases where no ejection was observed. The sample included single front, side and rear impacts as well as multiple impacts and rollover. The rate of belt use in the sample was 50%. While this analysis included all forms of impact scenarios, nevertheless, it highlights the relative injury severity of occupant ejection. Extensive literature search has found no full-scale rear impact tests involving Post Mortem Human Subjects (PMHS) conducted in a laboratory environment and resulting in ejection. This paper describes a total of 10 sled tests conducted on 3 belted PMHS using a simplified seat design composed of rigid plates assembled such that the angular and linear stiffness of the seatback (including the foam) was modeled. The initial angular position and the range of motion of the seatback, the size of the PMHS, the slack length of the seatbelt, the angular stiffness of the seatback, and the use of headrest were varied in the test matrix while the pulse was kept constant (triangular acceleration with a peak of 17 G at 30 ms and a duration of 95 ms). In the test series, the tests were not run randomly but the likelihood of occupant ejection was increased systematically until ejection occurred. PMHS seat ejection was observed only for the 95th percentile, initially positioned with a seatback angle relative to the vertical equal to 22°, a range of seatback angular motion equal to 44° and no headrest. Repeating the test under the same conditions but with the pretentionner fired did not prevent the ejection. In addition, the 50th percentile belted specimen were not observed to sustain rearward seat ejection under realistic conditions including the use of head-rest.


Assuntos
Acidentes de Trânsito , Automóveis , Aceleração , Idoso , Idoso de 80 Anos ou mais , Fenômenos Biomecânicos , Cadáver , Desenho de Equipamento , Humanos , Pessoa de Meia-Idade , Cintos de Segurança
13.
Stapp Car Crash J ; 55: 199-250, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22869310

RESUMO

Rib fractures constitute a good indication of severity as there are the most frequent type of AIS3+ chest injuries. In 2008, Trosseille et al. showed a promising methodology to exhibit the rib fracture mechanisms, using strain gauges glued on the ribs of Post-Mortem Human Subjects (PMHS) and developing a specific signal analysis. In 2009, they published the results of static airbag tests performed on 50th percentile male PMHS at different distances and angles (pure lateral and 30 degrees forward oblique direction). To complete these already published data, a set of 8 PMHS lateral and oblique impactor tests were performed with the same methodology. The rib cages were instrumented with more than 100 strain gauges on the ribs, cartilage and sternum. A 23.4 kg impactor was propelled at 4.3 or 6.7 m/s. The forces applied onto the PMHS at 4.3 m/s ranged from 1.6 kN to 1.9 kN and the injuries varied from 4 to 13 rib fractures. At 6.7 m/s, the forces applied onto the PMHS ranged from 2.6 kN to 4 kN and the injuries varied from 9 to 16 rib fractures. The results of 24 tests from Trosseille et al. 2008 and 2009 and from the current study were processed in the same way and analyzed together. The time and location of the fractures were determined for each test and a ribcage fracture scenario was defined for each configuration. Strain profile corridors were built for pure lateral and forward oblique impacts, in the case of a rigid impact (impactor) or for an airbag loading. They can be used to assess the human body model biofidelity and the validation of rib fracture mechanisms in these models. Based on these corridors, the effects of the severity, the impact angle and the loading system on rib strain profiles were analyzed and are presented in this paper.


Assuntos
Acidentes de Trânsito , Air Bags , Fraturas das Costelas/fisiopatologia , Costelas/fisiopatologia , Estresse Mecânico , Idoso , Idoso de 80 Anos ou mais , Fenômenos Biofísicos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
14.
Eur Urol ; 59(1): 148-54, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21030144

RESUMO

BACKGROUND: Duloxetine is effective in the management of stress urinary incontinence (SUI) in women but has been poorly evaluated in the treatment of SUI following radical prostatectomy (RP). OBJECTIVE: To establish the superiority of duloxetine over placebo in SUI after RP. DESIGN, SETTING, AND PARTICIPANTS: We conducted a prospective, randomised, placebo-controlled, double-blind, monocentric superiority trial. After a placebo run-in period of 2 wk, patients with SUI after RP were randomised to receive either 80mg of duloxetine daily or matching placebo for 3 mo. MEASUREMENTS: The primary outcome measure was the relative variation in incontinence episodes frequency (IEF) at the end of study compared to baseline. Secondary outcomes included quality of life (QoL) measures (Incontinence Impact Questionnaire Short Form [IIQ-SF], Urogenital Distress Inventory Short Form [UDI-SF], Incontinence Quality of Life [I-QoL]), symptom scores (Urinary Symptom Profile [USP] questionnaire, International Consultation on Incontinence/World Health Organisation Short Form questionnaire [ICIQ-SF], the Beck Depression Inventory [BDI-II] questionnaire), 1-h pad test, and assessment of adverse events. RESULTS AND LIMITATIONS: Thirty-one patients were randomised to either the treatment (n=16) or control group (n=15). Reduction in IEF was significant with duloxetine compared to placebo (mean±standard deviation [SD] variation: -52.2%±38.6 [range: -100 to +46] vs +19.0%±43.5 [range: -53 to +104]; mean difference: 71.2%; 95% confidence interval [CI] for the difference: 41.0-101.4; p<0.0001). IIQ-SF total score, UDI-SF total score, SUI subscore of the USP questionnaire, and question 3 of the ICIQ-SF questionnaire showed improvement in the duloxetine group (p=0.006, p=0.02, p=0.0004, and p=0.003, respectively). Both treatments were well tolerated throughout the study period. CONCLUSIONS: Duloxetine is effective in the treatment of incontinence symptoms and improves QoL in patients with SUI after RP.


Assuntos
Inibidores da Captação Adrenérgica/uso terapêutico , Prostatectomia/efeitos adversos , Inibidores de Captação de Serotonina/uso terapêutico , Tiofenos/uso terapêutico , Incontinência Urinária/prevenção & controle , Inibidores da Captação Adrenérgica/efeitos adversos , Idoso , Idoso de 80 Anos ou mais , Distribuição de Qui-Quadrado , Método Duplo-Cego , Cloridrato de Duloxetina , Humanos , Masculino , Pessoa de Meia-Idade , Paris , Projetos Piloto , Efeito Placebo , Estudos Prospectivos , Qualidade de Vida , Inibidores de Captação de Serotonina/efeitos adversos , Inquéritos e Questionários , Tiofenos/efeitos adversos , Fatores de Tempo , Resultado do Tratamento , Incontinência Urinária/etiologia
15.
Clin Cancer Res ; 17(4): 836-40, 2011 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-21177411

RESUMO

PURPOSE: The retrospective use of prostate cancer tissue is crucial to design tumor marker prognostic studies. We hypothesize that comparison between recent and more historical cases could introduce biases due to stage and grade migration upon time. DESIGN: We reviewed 544 margin-free specimens from patients treated for clinically localized prostate cancer by radical prostatectomy between 2000 and 2005. One hundred and ninty-two patients that underwent biochemical recurrence after surgery were matched with 352 patients without progression, according to pretreatment prostate specific antigen, Gleason score, pathologic stage, and follow-up duration (at least 36 months). RESULTS: The reassessment led to histopathologic reclassification of standard prognostic variables in 15% of cases, including modifications in the Gleason score (n = 63), pathologic stage (n = 12), and margin status (n = 30). Most discrepancies with the initial reports are explained either by differences in the scoring system upon time, or by the exam of additional tissues sections. The impact of reclassification led to increase adverse prognostic factors more frequently in the group of patients with progression (Chi(2), P < 0.0001). CONCLUSION: Careful reassessment of prostate cancer samples should be mandatory before molecular prognostic studies to ensure a more uniform pathologic evaluation, and might be reported in the "recommendations for tumor markers prognostic studies" (REMARK).


Assuntos
Recidiva Local de Neoplasia/patologia , Neoplasias da Próstata/patologia , Humanos , Masculino , Estadiamento de Neoplasias , Antígeno Prostático Específico/metabolismo , Prostatectomia , Neoplasias da Próstata/cirurgia , Estudos Retrospectivos
16.
Int Braz J Urol ; 36(4): 385-400, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20815945

RESUMO

Laparoendoscopic single site surgery (LESS) and natural orifice transluminal endoscopic surgery (NOTES) represent novel approaches in urological surgery. To perform a review of the literature in order describe the current status of LESS and NOTES in Urology. References for this manuscript were obtained by performing a review of the available literature in PubMed from 01-01-02 to 15-05-09. Search terms included single port, single site, NOTES, LESS and single incision. A total of 412 manuscripts were initially identified. Out of these, 64 manuscripts were selected based in their urological content. The manuscript features subheadings for experimental and clinical studies, as NOTES-LESS is a new surgical technique and its future evolution will probably rely in initial verified feasibility. A subheading for reviews presents information regarding common language and consensus for the techniques. The issue of complications published in clinical series and the future needs of NOTES-LESS, are also presented.


Assuntos
Laparoscopia/métodos , Cirurgia Endoscópica por Orifício Natural , Prostatectomia/métodos , Neoplasias da Próstata/cirurgia , Humanos , Masculino , Robótica/métodos , Resultado do Tratamento , Procedimentos Cirúrgicos Urológicos
17.
Int. braz. j. urol ; 36(4): 385-400, July-Aug. 2010. tab
Artigo em Inglês | LILACS | ID: lil-562105

RESUMO

Laparoendoscopic single site surgery (LESS) and natural orifice transluminal endoscopic surgery (NOTES) represent novel approaches in urological surgery. To perform a review of the literature in order describe the current status of LESS and NOTES in Urology. References for this manuscript were obtained by performing a review of the available literature in PubMed from 01-01-02 to 15-05-09. Search terms included single port, single site, NOTES, LESS and single incision. A total of 412 manuscripts were initially identified. Out of these, 64 manuscripts were selected based in their urological content. The manuscript features subheadings for experimental and clinical studies, as NOTES-LESS is a new surgical technique and its future evolution will probably rely in initial verified feasibility. A subheading for reviews presents information regarding common language and consensus for the techniques. The issue of complications published in clinical series and the future needs of NOTES-LESS, are also presented.


Assuntos
Humanos , Masculino , Laparoscopia/métodos , Cirurgia Endoscópica por Orifício Natural , Prostatectomia/métodos , Neoplasias da Próstata/cirurgia , Robótica/métodos , Resultado do Tratamento , Procedimentos Cirúrgicos Urológicos
19.
Int Braz J Urol ; 36(2): 129-39; discussion 140, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20450497

RESUMO

PURPOSE: To review the literature and present a current picture of the evolution in radical prostatectomy from the laparoscopic point of view. MATERIALS AND METHODS: We conducted an extensive Medline literature search. Articles obtained regarding laparoscopic radical prostatectomy (LRP) and our experience at Institut Montsouris were used for reassessing anatomical and technical issues in radical prostatectomy. RESULTS: LRP nuances were reassessed by surgical teams in order to verify possible weaknesses in their performance. Our basic approach was to carefully study the anatomy and pioneer open surgery descriptions in order to standardized and master a technique. The learning curve is presented in terms of an objective evaluation of outcomes for cancer control and functional results. In terms of technique-outcomes, there are several key elements in radical prostatectomy, such as dorsal vein control-apex exposure and nerve sparing with particular implications in oncological and functional results. Major variations among the surgical teams' performance and follow-up prevented objective comparisons in radical prostatectomy. The remarkable evolution of LRP needs to be supported by comprehensive results. CONCLUSIONS: Radical prostatectomy is a complex surgical operation with difficult objectives. Surgical technique should be standardized in order to allow an adequate and reliable performance in all settings, keeping in mind that cancer control remains the primary objective. Reassessing anatomy and a return to basics in surgical technique is the means to improve outcomes and overcome the difficult task of the learning curve, especially in minimally access urological surgery.


Assuntos
Laparoscopia/métodos , Próstata/cirurgia , Prostatectomia/métodos , Neoplasias da Próstata/cirurgia , Robótica/métodos , Humanos , Masculino , Prostatectomia/tendências , Resultado do Tratamento
20.
Int. braz. j. urol ; 36(2): 129-140, Mar.-Apr. 2010. ilus, tab
Artigo em Inglês | LILACS | ID: lil-548372

RESUMO

PURPOSE: To review the literature and present a current picture of the evolution in radical prostatectomy from the laparoscopic point of view. MATERIALS AND METHODS: We conducted an extensive Medline literature search. Articles obtained regarding laparoscopic radical prostatectomy (LRP) and our experience at Institut Montsouris were used for reassessing anatomical and technical issues in radical prostatectomy. RESULTS: LRP nuances were reassessed by surgical teams in order to verify possible weaknesses in their performance. Our basic approach was to carefully study the anatomy and pioneer open surgery descriptions in order to standardized and master a technique. The learning curve is presented in terms of an objective evaluation of outcomes for cancer control and functional results. In terms of technique-outcomes, there are several key elements in radical prostatectomy, such as dorsal vein control-apex exposure and nerve sparing with particular implications in oncological and functional results. Major variations among the surgical teams' performance and follow-up prevented objective comparisons in radical prostatectomy. The remarkable evolution of LRP needs to be supported by comprehensive results. CONCLUSIONS: Radical prostatectomy is a complex surgical operation with difficult objectives. Surgical technique should be standardized in order to allow an adequate and reliable performance in all settings, keeping in mind that cancer control remains the primary objective. Reassessing anatomy and a return to basics in surgical technique is the means to improve outcomes and overcome the difficult task of the learning curve, especially in minimally access urological surgery.


Assuntos
Humanos , Masculino , Laparoscopia/métodos , Próstata/cirurgia , Prostatectomia/métodos , Neoplasias da Próstata/cirurgia , Robótica/métodos , Prostatectomia/tendências , Resultado do Tratamento
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