机器人辅助腹腔镜下肾部分切除术两种入路的对比研究

目的:比较经腹膜后和经腹腔两种手术入路机器人辅助腹腔镜下肾部分切除术的临床疗效。方法:回顾性分析2018年6月-2021年1月于甘肃省人民医院行肾部分切除术患者67例的临床资料,根据手术入路不同将患者分为经腹腔组和经腹膜后组。经腹腔入路组患者共26例(男11例,女15例),平均年龄为(53.5±9.7)岁;经腹膜后入路组患者共41例(男20例,女21例),平均年龄为(55.2±12.5)岁。比较两组患者的手术疗效、病理结果和围手术期情况。结果:67例患者的机器人辅助腹腔镜下肾部分切除术均顺利完成,无中转开腹手术。经腹腔入路和经腹膜后入路组术中出血量、热缺血时间、手术时间、术后并发症发生率比较,差异均无统计学意义(P>0.05)。而经腹膜后入路组患者的术后肠道功能较经腹腔入路组恢复快(P<0.05)。结论:采用经腹膜后入路在机器人辅助腹腔镜下肾部分切除术中可以取得和经腹腔入路同样的手术效果,而且其在术后肠道功能恢复方面具有优势。     

Renal function remains after unilateral total and contralateral partial nephrectomy: an experimental study in pigs using 99mTc-DTPA

Twelve nephrectomies (NEs) were performed in 12 pigs (11–17 kg). Total NE was performed on the left side and partial NE on the right side (lower third of the kidney), thus two-thirds of the total kidney volume was removed. Renal function was studied with ^99mTc-diethylenetriaminepentaacetic acid (DTPA) renography and serum urea and creatinine levels preoperatively, and 1 and 2 weeks postoperatively. The pigs were imaged in each session for 30 min by collecting 10-s frames from a posteroanterior (PA) view of an anaesthesized animal. The injected activity was 37 MBq. Serial blood samples were taken from the subclavian vein at 0, 1, 2, 3, 5, 15, 25, 40, 60 and 120 min (six animals) after ^99mTc-DTPA injection. The DTPA disappearance rate (DDR) was determined from these samples and in other cases (six animals) a blood sample at 20 min was used. The DDR was also determined from the dynamic gamma imaging data: Regions of interest (ROI) were upper body, spleen, heart and kidneys. The ROI analysis correlated well with the blood sampling data (r=0.97, P<0.0001). The reference values for pig DDRs were 0.99±0.08%/min. These values were 0.71±0.08%/min at 1 week postoperatively and 0.63±0.08%/min at 2 weeks. DTPA clearance rates were preoperatively 0.53±0.06 ml/s; at 1 week postoperatively 0.41±0.06 ml/s; and at 2 weeks 0.35±0.06 ml/s. There were no significant differences pre- and postoperatively in creatinine and urea concentrations. The DTPA clearance (ml/s) and disappearance rates (%/min) when determined per kidney area (cm²) increased significantly (P<0.001 at both 1 and 2 weeks); in 11 of 12 animals the function of the resected right kidney was higher than the split function of the whole right kidney preoperatively. Unilateral nephrectomy initiates a functional adaptation or a growth response in the contralateral kidney to compensate for the loss of a renal mass. These data also indicate that two-thirds of the kidney volume in young pigs can be removed without danger.     

机器人辅助腹腔镜与腹腔镜肾部分切除术治疗巨大肾血管平滑肌脂肪瘤的疗效比较

目的:比较机器人辅助腹腔镜肾部分切除术(RAPN)与腹腔镜肾部分切除术(LPN)对巨大肾血管平滑肌脂肪瘤(RAML)的疗效。方法:回顾性分析浙江省人民医院2014年10月至2020年5月行手术治疗的43例巨大RAML(直径>7cm)患者的临床资料,其中23例行RAPN,20例行LPN。RAPN组男4例,女19例;中位年...     

Transition from laparoscopic to robotic partial nephrectomy: the learning curve for an experienced laparoscopic surgeon

Background:

The complexity of laparoscopic partial nephrectomy (LPN) has prompted many laparoscopic surgeons to adopt robotic partial nephrectomy (RPN) for the treatment of small renal masses. We assessed the learning curve for an experienced laparoscopic surgeon during the transition from LPN to RPN.

Methods:

We compared perioperative outcomes of the first 20 patients who underwent RPN to the last 18 patients who underwent LPN by the same surgeon (MAP). Surgical technique was consistent across platforms. The learning curve was defined as the number of cases required to consistently perform RPN with shorter average operative times (OT) and warm ischemia times (WIT), as compared to the last 18 LPN. A line of best fit aided graphical interpretation of the learning curve on a scatter diagram of OT versus procedure date.

Results:

The 2 groups had comparable preoperative demographics and tumor histopathology. No patients in either group had a positive surgical margin. There was a downward trend in both OT and WIT during the RPN learning curve. After the first 5 RPN cases, the average OT reached the average OT of the last 18 LPN cases. The average OT of the first 5 RPN patients was 242.8 minutes, compared with the average OT of the last 15 RPN patients of 171.3 minutes (P=0.011).

Conclusion:

The transition from LPN to RPN is rapid in an experienced laparoscopic surgeon. There were no significant differences in WIT, estimated blood loss, or length of hospital stay between LPN and RPN. RPN achieved a similar OT as LPN after 5 procedures.     

机器人辅助与后腹腔镜肾部分切除术治疗复杂性肾肿瘤的临床效果比较

目的:观察机器人辅助与后腹腔镜肾部分切除术治疗复杂性肾肿瘤的临床应用效果。方法:将64例复杂性肾肿瘤患者根据治疗方法分为对照组与观察组,每组32例。对照组行后腹腔镜肾部分切除术,观察组行机器人辅助肾部分切除术。比较两组手术时间、热缺血时间、术中出血量,术后并发症情况、术后病理检查结果及随访结果。结果:观察组手术时间、热缺血时间短于对照组,术中出血量少于对照组(P<0.05);两组住院时间及术后迟发性出血、急性肾衰竭、尿瘘、肾功能减退等并发症发生率差异无统计学意义(P>0.05);两组术后病理检查结果差异亦无统计学意义(P>0.05)。随访结果显示,观察组复发率低于对照组(P<0.05);术后1个月,两组肌酐水平均高于术前,观察组高于对照组(P<0.05)。结论:机器人辅助肾部分切除术可能利于降低术后复发率、尽可能保留术后患肾肾单位及肾功能。     

Predictors of warm ischemia time and perioperative complications in a multicenter, international series of robot-assisted partial nephrectomy

Background

Warm ischemia time (WIT) and complication rates are two important parameters for evaluating the perioperative results of robot-assisted partial nephrectomy (RAPN). Few data are available about the clinical predictors of WIT and overall complications.

Objective

To identify clinical predictors of WIT and perioperative complications.

Design, setting, and participants

This is a retrospective study including 347 patients who underwent RAPN for suspicious renal cell carcinoma (RCC) at four referral centers from September 2008 to September 2010.

Intervention

All patients underwent RAPN using the da Vinci S Surgical System with hilar clamping.

Measurements

WIT >20 min and overall complication rates were the main outcomes. Postoperative complications were classified according to the Clavien/Dindo system. Moreover, the following perioperative variables were considered: clinical tumor size, anatomical tumor characteristics according to Preoperative Aspects and Dimensions Used for an Anatomical (PADUA) classification score, surgeon experience, console time, blood loss, and upper collecting system (UCS) repair.

Results and limitations

WIT >20 min was reported in 125 (36%) cases. Intraoperative and postoperative complications were observed in 10 (2.9%) and 41 (11.8%) cases, respectively. Surgeon experience (odds ratio [OR]: 6.381; 95% confidence interval [CI], 3.687-11.042; p < 0.001), clinical tumor size (OR: 1.022; 95% CI, 1.002-1.044; p = 0.03), the other anatomic characteristics determined by the PADUA classification score (OR: 1.294; 95% CI, 1.080-1.549; p = 0.005), and the UCS repair (OR: 2.987; 95% CI, 1.728-5.165; p < 0.001) turned out to be independent predictors of WIT >20 min. Similarly, surgeon experience (OR: 3.937; 95% CI, 2.011-7.705; p < 0.001), clinical tumor size (OR: 1.033; 95% CI, 1.009-1.058; p = 0.007), and the other anatomical characteristics determined by the PADUA classification score (OR: 1.427; 95% CI, 1.149-1.773; p < 0.001) turned out to be independent predictors of overall complication rates. The retrospective design is the main limitation of this multicenter, international study. Therefore, some patient characteristics and comorbidities were not recorded.

Conclusions

Anatomic tumor characteristics as determined by the PADUA classification score were independent predictors of WIT and overall complications, once adjusted for the effects of surgeon experience and clinical tumor size.     

肾部分切除术治疗肾肿瘤的安全性及疗效分析

目的 评价肾部分切除术治疗肾肿瘤的安全性及有效性.方法 回顾性分析56例行肾部分切除术患者的临床资料.术中肾动脉阻断时间≤30 min者28例.＞30 min者28例.采用99Tcm-DTPA肾核素扫描检测术前术后分肾的肾小球滤过率(GFR),比较两组患者术中出血量、手术时间、术后住院日、并发症发生率以及术前、术后1周和术后6个月的GFR值,明确肾热缺血安全时限,并随访远期生存情况.结果 术后随访30～48个月,平均36个月,总体生存率和肿瘤无复发生存率分别为100%和98%.阻断时间≤30 min和＞30 min组患者术中失血量、手术时间、术后住院日及并发症比较,差异均无统计学意义(P＞0.05).两组术前患肾GFR分别为(42.9±4.9)、(42.8±5.6)ml/min,术后1周为(34.2±4.9)和(30.4±5.2)ml/min,前者GFR降低程度低于后者,差异有统计学意义(p=0.007).术后6个月时肾热缺血时间≤30 min组患肾GFR为(41.2±4.3)ml/min,与术前相比,差异无统计学意义(P＞0.05);＞30 min组GFR为(38.1±5.0)ml/min,仍明显低于术前水平(P=0.001).结论 肾部分切除术治疗肾肿瘤局部复发率低,远期生存率高,并发症发生率低,而且能最大限度地保留功能性肾单位,安全有效.术中阻断肾血管可以有效减少术中失血,将热缺血时间控制在30 min内,对肾功能影响较小,安全可行.

Abstract：

Objective To report the safety and efficacy of partial nephrectomy (PN) in 56 patients with renal tumors. Methods A retrospective analysis was performed for 56 patients who were treated with PN.Patients were divided into two groups according to the occlusion time.The occlusion time for Group 1 was≤30 min in 28 cases,and Group 2＞30 min in 28 cases.All patients underwent pre-and post-operation 99Tcm-diethylenetriamine pentoacetic acid renal scintigraphy, to determine the renal glomerular filtration rate (GFR).The GFR values, amount of blood loss during operation,operative time,postoperative hospital stay and the complications rate were compared between the two groups prior to surgery and one week and six months post-surgery.All patients were followed-up.Results The average follow-up time was 36 (30-48) months.The overall survival rate and tumor recurrence-free survival rate were 100% and 98%.There was no significant difference between vessel clamp time≤30 min and＞30 min in the amount of intraoperative blood loss,operative time,postoperative hospital stay and complications rate,P values were 0.266,0.487,0.879 and 1.000.The preoperative and 1 week postoperative GFR values of the two groups were (42.9±4.9) and (34.2±4.9),(42.8±5.6) and (30.4±5.2) ml/min.The difference was significant(P=0.007).The GFR values were (41.2±4.3)ml/min at 6 months after surgery for Group 1,compared with that before surgery,but the difference was not significant (P＞0.05).While the GFR values were (38.1±5.0) ml/min for Group 2,and the GFR for Group 2 did not recover to the preoperative level (P=0.001). Conelusions PN for renal tumors could be a safe and effective treatment option.The damage on renal function could be minimal when the renal artery clamping time is controlled to within 30 min.     

Robotic versus open partial nephrectomy for highly complex renal masses: Comparison of perioperative,functional, and oncological outcomes

Introduction

We aimed to compare perioperative, functional and oncological outcomes between robot-assisted partial nephrectomy (RAPN) and open partial nephrectomy (OPN) for highly complex renal tumors (R.E.N.A.L. nephrometry Score > 9).

Impact of microwave tissue coagulation during laparoscopic partial nephrectomy on postoperative renal function

Laparoscopic partial nephrectomy for small renal tumors has been performed with increasing frequency over the past few years. We prospectively evaluated preoperative and postoperative differential renal function in patients with functioning contralateral kidneys who underwent laparoscopic partial nephrectomy using a microwave tissue coagulator without hilar clamping. Seven patients (five men and two women) in this prospective protocol underwent laparoscopic partial nephrectomy for exophytic tumors using a microwave tissue coagulator when the tumor was 2 cm or less in diameter. Renal scanning with ⁹⁹technetium-labeled diethylenetetraminepentaacetic-acid scan was performed preoperatively and postoperatively at 7 days and 6 months after surgery in all patients. The mean tumor size and surgical duration were 17.0 ± 2.3 mm and 161.1 ± 20.5 min, respectively. Intraoperative blood loss was 35.6 ± 40.7 ml. The preoperative glomerular filtration rate (GFR) and differential split renal function (SF) in the affected kidney were 45.7 ± 12.8 ml/min and 50.5 ± 3.3%, respectively. On postoperative day 7 and at 6 months, GFR and SF in the affected kidney were 36.2 ± 9.0 and 36.8 ± 10.9 ml/min and 44.3 ± 4.1 and 45.0 ± 5.1%, respectively. No postoperative complications occurred. Laparoscopic nonischemic partial nephrectomy using a microwave tissue coagulator has the advantage of technical ease and adequate hemostasis. However, its indication should be restricted to small exophytic renal tumors due to the expected collateral damage causing renal impairment.     

Laparoscopic partial nephrectomy using microwave tissue coagulator for small renal tumors: usefulness and complications

OBJECTIVES: We evaluated the usefulness and complications of laparoscopic partial nephrectomy for small renal tumors using a microwave tissue coagulator without renal pedicle clamping. METHODS: Between September 1999 and March 2003, 19 patients with small renal tumors 11 to 45 mm in diameter underwent laparoscopic partial nephrectomy without renal ischemia. RESULTS: Six and 13 patients were treated by the transperitoneal and retroperitoneal approaches, respectively. Excluding a case with open conversion due to dense perirenal adhesions, 18 patients successfully underwent laparoscopic procedures. The mean operative time was 240 minutes with minimal blood loss in 14 patients and 100 to 400 ml in 4. In a patient, frozen sections revealed a positive surgical margin and additional resection was performed. Postoperative complications included extended urine leakage for 14 days, arteriovenous fistula and almost total loss of renal function, respectively, in a patient. With the median follow-up of 19 months, no patients showed local recurrence or distant metastasis by CT scan. CONCLUSIONS: Laparoscopic non-ischemic partial nephrectomy using a microwave tissue coagulator may be useful for treating small renal tumors because it does not require advanced laparoscopic skill. However, the indication of this procedure should be highly selective in order to minimize serious complications secondary to unexpected collateral damage to surrounding structures.     

Renal cavernous hemangioma: robot-assisted partial nephrectomy with selective warm ischemia. Case report and review of the literature

Renal hemangioma is a relatively rare benign tumor with a wide range of clinical and radiological presentation, not easy to differentiate preoperatively from a renal cancer. Due to its benign nature complete surgical resection is the recommended therapy and is considered curative.A 73-year old male patient followed-up for a lung carcinoma and a chronic renal failure underwent a CT scan showing a 35-mm mass of the inferior pole of the left kidney.The patient underwent robot-assisted partial nephrectomy with left inferior pole selective warm ischemia. The outcome was favorable and no repercussions on the renal reserve were observed postoperatively.Histopathological characteristics of the surgical specimen were consistent with renal cavernous hemangioma.A robot-assisted operation allows the fine dissection required to carry out a bloodless nephron-sparing surgery without a complete warm ischemia. The use of robot could be noteworthy for nephron-sparing surgery in cases of concomitant chronic renal failure.     

机器人辅助后腹腔镜肾脏内翻法背侧肾门肿瘤肾部分切除术

目的研究机器人辅助后腹腔镜肾脏内翻法背侧肾门肿瘤肾部分切除术的临床安全性和有效性。方法回顾性总结我院2017年4月至2018年4月收治的背侧肾门肿瘤患者行机器人辅助后腹腔镜肾脏内翻法肾部分切除术的临床资料,并对手术步骤及结果进行总结。共计21例,其中男17例,女4例,年龄26~78岁,平均(53±14)岁,肾肿瘤均为单发,直径(2.5~8.0)cm,平均(4.3±1.7)cm,R.E.N.A.L评分6~12分,平均(9.4±1.5)分。取完全健侧卧位,术中于皱褶或薄弱处(Toldt’s线)切开腹膜:右侧向上至结肠肝曲,必要时切开三角韧带和肝结肠韧带;左侧向上至脾脏外上缘,必要时离断脾肾韧带和脾结肠韧带。向下至肾下极,使升结肠和结肠肝曲或脾和降结肠向腹侧中线移位。依次切断肾上、下极的脂肪组织分别至肾蒂血管、输尿管处,使患肾可轻易或自动向腹侧翻转,肿瘤及肾门得以充分显露,行常规肾部分切除及缝合。结果所有患者均顺利完成手术,无中转开放或改根治性肾切除。镜下操作时间30~140 min,平均(80±24)min。术中出血量为20~500 ml,平均(104±115)ml。输自体血12例,无输异体血者。肾热缺血时间为8~34 min,平均(17±7)min。术后肛门排气时间平均35 h,应用止痛药3例。发生尿瘘1例,留置双J管引流治愈。无腹腔脏器损伤、感染及继发出血等并发症。病理结果:透明细胞癌15例,血管平滑肌脂肪瘤4例,乳头状癌1例,嗜酸细胞瘤1例,恶性肿瘤无切缘阳性。术后随访6~18个月,中位时间12个月,所有患者未见肿瘤复发或转移。结论机器人辅助后腹腔镜背侧肾门肿瘤肾部分切除术,肾脏内翻法可使肿瘤和血管充分显露,便于操作,降低手术难度,安全有效。     

Predicting postoperative renal insufficiency in patients undergoing nephrectomy for renal malignancy: assessment by renal scintigraphy using 99mtechnetium-mercaptoacetyltriglycine

PURPOSE: We performed Tc-mercaptoacetyltriglycine (MAG3) renal scintigraphy in patients with renal malignancy to evaluate the function of each renal unit before and after nephrectomy to see if postoperative functional deterioration could be predicted based on scintigraphy results and creatinine clearance. MATERIALS AND METHODS: A total of 22 men and 13 women with renal malignancy, including 32 with renal cell carcinoma and 3 with urothelial cancer, were prospectively enrolled in this study. Average patient age was 64.3 years (median 65, range 43 to 88). All patients underwent MAG3 renal scintigraphy before and after unilateral nephrectomy. At the same time serum creatinine and endogenous creatinine clearance were determined. RESULTS: Mean serum creatinine was 0.93 mg/dl before and 1.31 after nephrectomy (p <0.0001). Preoperative endogenous creatinine clearance was 70.8 ml per minute per 1.73 m, which decreased to 49.0 ml per minute per 1.73 m after nephrectomy (p <0.0001). Mean MAG3 clearance of the remaining kidney increased 35.1% above baseline from 156.5 to 211.5 ml per minute per 1.73 m following nephrectomy. Spearman rank core analysis revealed that preoperative MAG3 clearance of the remaining kidney significantly correlated with postoperative creatinine clearance (r = 0.596, p = 0.0005). Preoperative MAG3 clearance of the remaining kidney more than 130 ml per minute per 1.73 m coincided with postoperative creatinine clearance above 40 ml per minute per 1.73 m. CONCLUSIONS: MAG3 renal scintigraphy may be useful for predicting renal insufficiency after nephrectomy. The findings in this study suggest that preoperative MAG3 clearance of the remaining kidney less than 130 ml per minute per 1.73 m is a risk factor for postoperative renal insufficiency.