Precise segmental renal artery clamping under the guidance of dual-source computed tomography angiography during laparoscopic partial nephrectomy.
BACKGROUND
Minimizing warm ischemic (WI) injury is one technical focus of partial nephrectomy (PN). Inducing regional ischemia in the tumor area by clamping segmental renal arteries has become an alternative method to decrease WI injury.


OBJECTIVE
To study the technical feasibility of precise segmental artery clamping under the guidance of dual-source computed tomography (DSCT) angiography during laparoscopic partial nephrectomy (LPN) and to analyze the factors affecting surgical outcomes.


METHODS
Retrospective analysis of 125 patients with unilateral kidney tumor treated from December 2009 to November 2011 with a mean follow-up of 18 mo.


METHODS
All patients received retroperitoneal LPN with the feeding segmental arteries precisely clamped. Most of the target branches were dissected close to the hilar parenchyma. The tumor was excised after precise clamping and renorrhaphy was performed.


METHODS
Univariable and multivariable logistic regression analyses were performed for categorical variables, and continuous variables were analyzed by linear regression.


CONCLUSIONS
The target branches were isolated and clamped successfully in all patients without clamping the main renal artery. Median estimated blood loss (EBL) was 200 ml, and nine patients received blood transfusion. The accuracy of feeding artery orientation by DSCT angiography reached 93.6%. Tumor size, location, and growth pattern independently influenced the number of clamped branches. The number of clamped branches was significantly associated with postoperative renal function and EBL. Limitations of this study include its retrospective nature and that data are from a single-surgeon series.


CONCLUSIONS
The precise segmental artery clamping technique under the guidance of DSCT angiography is feasible and efficient to excise the tumor and to protect the normal parenchyma. The number of clamped branches is associated with tumor characteristics and can predict EBL and loss of renal function.
Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Pengfei
P
Shao
Lijun
L
Tang
Pu
P
Li
Yi
Y
Xu
Chao
C
Qin
Qiang
Q
Cao
Xiaobing
X
Ju
Xiaoxin
X
Meng
Qiang
Q
Lv
Jie
J
Li
Wei
W
Zhang
Changjun
C
Yin
D000293:Adolescent; D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography / Q000379:methods; D002648:Child; D003250:Constriction; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009392:Nephrectomy / Q000379:methods*; D012077:Renal Artery; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed