影响腹腔镜下保留肾单位术后肾功能的多因素分析

目的 探讨影响腹腔镜下保留.肾单位手术术后肾功能的因素. 方法 前瞻性总结50例肾癌腹腔镜下保留肾单位手术患者临床资料.采用99 Tcm-二乙三胺五乙酸肾动态显像检测术前术后分肾肾小球滤过率(GFR)值的变化.采用相关和多元回归模型分析与术后.肾功能损害有关的因素,包括患者年龄、肿瘤大小、术前血肌酐值、术中肾血管阻断时间及术中出血量,确定影响术后肾功能的危险因素.随访其中20例,比较术前、术后1周及术后3个月 GFR值,明确肾脏热缺血安全时间;同时观察肾功能恢复情况. 结果 50例患者手术前后GFR平均值分别为(45.86土5.14)、(34.52+5.89)ml/min,术后减少约24%.多元回归分析显示肾血管阻断致肾脏热缺血时间长短是决定术后肾功能损害的独立危险因素.肾脏热缺血时间≤30 min和＞30 rain组,术前术后1周的GFR值分别为(45.38±6.19)和(38.54土5.18)、(46.11±4.62)和(32.51士6.26)ml/min,前者GFR值降低程度低于后者,差异有统计学意义(P＜0.01)}随访观察20例患者,肾脏热缺血时间≤30 min组术后3个月GFR值(44.38+5.59)ml/min,与术前相比,P＞0.05,差异无统计学意义;年龄＞70岁、肾脏热缺血时间＞30 min或肾脏热缺血时间＞60 rain的患者术后3个月GFR值恢复缓慢.结论影响腹腔镜下保留肾单位术后肾功能的关键因素为肾脏热缺血时间,肾脏热缺血时间≤30min者术后肾功能可以完全恢复;肾脏热缺血时间＞30 min且年龄＞70岁或肾脏热缺血时间＞60min者术后肾功能有一定程度的损害.

Multivariate regression analysis of factors influencing renal function after laparoscopic nephron-sparing surgery

Objective To study the factors associated with post-operattve renal function injury after laparoscopic nephron-sparing surgery(LNSS)for tumors. Methods Fifty consecutive patients were enroned in a prospective protocol and underwent LNSS.Preoperative and postoperative renal scintigraphic scan was performed in all patients. 99 Tcm-diethylenetetraminepentacetic acid scan was performed in all patients.Linear correlation and multivariate regression model were used to analysis the factors associated with postoperative renal damage.Twenty consecutive patients associated with risk factors were followed-up.These data in GFR were monitored at the preoperative,1 week and 3 months after operation.The duration Warm ischemia was recorded. Results In selected patients,assessed by renal scintigraphy,the function of the operated kidney was reduced by a mean of 24%.Linar correlation analysis showed that there was positive correlation between the age,tumor size,duration of warm ischemia and postoperative renal function injury.Furthermore,multivariate Legression analysis revealed that the duration of warm ischemia was the independent risk factor of postoperative renal damage.Twenty consecutive patients were included in this protocol.There was a significant difference between vessel clamp time≤30 min and vessel clamp time＞30 min.Renal scan data did not reveal any significant decrease in GFR in the affected kidney at 3 months after surgery for the patients whose yesscl clamp time less than 30 min.Renal function damage could not recover in the patients over 70 years with longer than 30 min warm ischemia or with longer than 60 min warm ischemia. Conclusions This paper evaluated renal function on the affected side before and after surgery by measuring renal function with renal scintigraphy using99 Tcm-DTPA.Risk factors for renal dysfunction in the affected kidney after LPN are age over 70 years with more than 30min warm ischemia time,and a warm ischemia time longer than 60 min.