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Inicio Actas Urológicas Españolas (English Edition) Off-clamp renal tumourectomy by retroperitoneoscopy in posterior renal tumors of...
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Vol. 40. Issue 1.
Pages 11-16 (January - February 2016)
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Vol. 40. Issue 1.
Pages 11-16 (January - February 2016)
Original article
Off-clamp renal tumourectomy by retroperitoneoscopy in posterior renal tumors of medium complexity (Padua score 8–9)
Tumorectomía off-clamp por retroperitoneocopia en tumores renales posteriores de complejidad media (Padua score 8–9)
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J.A. Peña
Corresponding author
japena@fundacio-puigvert.es

Corresponding author.
, I. Schwartzmann, P. Gavrilov, E. Moncada, J.M. López, J.M. Gaya, M. Oliveira, A. Breda, A. Rosales, J. Palou, H. Villavicencio
Unidad de Uro-Oncologia, Servicio de Urologia, Fundació Puigvert, Universidad Autónoma de Bárcelona, Barcelona, Spain
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Tables (3)
Table 1. Demographic characteristics of patients.
Table 2. Surgical characteristics.
Table 3. Renal function evolution.
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Abstract
Background

The guidelines recommend partial surgery for T1 renal tumors. Various aspects of this surgery have evolved in recent years, including the clamping method and duration, enucleation, the retroperitoneoscopic approach and the use of 3mm ports. We present our initial series on laparoscopic renal tumourectomy by retroperitoneoscopy (LRTR) and analyse our learning curve and use of 3-mm instrumentation.

Material and methods

From January 2011 to January 2015, we performed LRTR on 50 patients with posterior or convex T1 renal tumors. After 10 cases, the technique changed to off-clamp, and 11 cases were subsequently performed with 3mm instrumentation.

Results

The mean tumor size was 34.36mm (14–62), with a mean PADUA score of 8.42 (5–12). The mean operative time was 163.1min (75–300), and the mean warm ischemia time was 4.21min (0–28). The main renal artery was not clamped in 41 (82%) patients, and no vessel (zero ischemia) was clamped in 39 (78%) patients. Seven cases had positive margins (6 focal). Eleven LRTRs were performed with 3mm instrumentation, with shorter surgical times, less intraoperative bleeding and shorter hospital stays.

Conclusions

Retroperitoneoscopy coupled with enucleation enables the extirpation without clamping of posterior renal tumors, with a relatively short learning curve. The 3-mm material enables the technique to be performed, although in our experience it has resulted in a higher rate of positive surgical margins.

Keywords:
Laparoscopy
Retroperitoneoscopy
Partial nephrectomy
Off-clamp
Minilaparoscopy
Resumen
Introducción

Las guías recomiendan cirugía parcial en tumores renales T1. Diferentes aspectos han evolucionado en estos últimos años: forma y duración del clampaje, enucleación, abordaje por retroperitoneoscopia y la utilización de puertos de 3mm. Presentamos nuestra serie inicial de tumorectomía renal laparoscópica por retroperitoneoscopia (TRLR) analizando nuestra curva de aprendizaje y el uso de instrumental de 3mm.

Material y métodos

De enero 2011 a enero 2015, realizamos TRLR a 50 pacientes con tumores renales T1 de cara posterior o convexidad renal. Tras 10 casos, la técnica pasó a ser off-clamp y posteriormente en 11 casos se realizó con 3mm.

Resultados

El tamaño tumoral fue de 34,36mm (14–62) con un PADUA de 8,42 (5–12), tiempo operatorio de 163,1 minutos (75–300) y tiempo de isquemia caliente de 4,21 minutos (0–28). No se clampó la arteria renal principal en 41 (82%) pacientes y ningún vaso (isquemia 0) en 39 (78%). Siete casos presentaron márgenes positivos (6 focales). Se realizaron 11 TRLR con material de 3mm con un tiempo quirúrgico, sangrado intraoperatorio y estancia hospitalaria menores.

Conclusiones

La retroperitoneoscopia sumada a enucleación permiten la extirpación sin clampaje de tumores posteriores del riñón con una curva de aprendizaje relativamente corta. El material de 3mm permite realizar la técnica aunque en nuestra experiencia ha resultado en una mayor tasa de márgenes quirúrgicos positivos.

Palabras clave:
Laparoscopia
Retroperitoneoscopia
Nefrectomía parcial
Off-clamp
Minilaparoscopia

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