Fig. 7.1
Hem-o-lok™ clips. The cardinal rules for application of these clips are as follows: (1) The knob of the clip should be seen. (2) The click of the clip should be heard. (3) The vessel to be clipped should be circumferentially dissected. (4) Two clips should be applied always on the patient side. (5) A cuff of 2 mm should be kept beyond the clip
Fig. 7.2
The staplers should be applied only in completely dissected vessels
7.6 Other Alternatives for Hilar Control
Numerous substitutes for renal vein ligation other than the Endo GIA stapler have been described while developing laparoscopic nephrectomy. Kadirkamanathan described the placement of knots on the renal hilar vessels intracorporeally [13]. Ultrasonic scalpel and bipolar device have been tried on a porcine model successfully [14]. Nevertheless, these techniques were deemed to be unpredictable.
Janetschek et al. described a technique of extracorporeal knots to reduce its diameter prior to the application of Hem-o-lok clips and effectively used this technique for 20 nephrectomies [15]. A knot pusher was used to push the knot down around the renal vein, although this was accomplished with precision to avoid any injury to the vein. On an average, 2 min was needed for placing knots, thus preventing its application during LDN to reduce the warm ischaemia time. Lately, modifications to this technique included manual constriction of the renal vein before the application of Hem-o-lok clip [16].
Numerous variations have been proposed to easily and safely harvest the right kidney via laparoscopic approach. Gill et al. have reported right-sided donor nephrectomy via retroperitoneoscopy. An Endo GIA stapler was used for dividing the renal vessels following which bench dissection was performed to free the hilar vessels, thus gaining additional length for the vascular anastomosis [17]. Lee et al. described a laparoscopic-assisted technique where a horizontal incision of 8 cm was placed in the upper quadrant on the right side which was used to pass a Satinsky clamp over the IVC, and the same was used for vessel control, kidney extraction and repair of cavotomy [18].
A modified Satinsky atraumatic vascular clamp, intended for thoracoscopic procedures, has been used for the purpose of right-sided nephrectomies (Figs. 7.3 and 7.4). A tiny incision is placed to the right side of the anterior superior iliac spine and is used to clamp the IVC and divide the adjacent renal vein with scissors. This modified instrument is longer than the routine clamp and is inserted without trocar into the peritoneum. The IVC is sutured laparoscopically with 3-0 running PDS suture prior to the clamp removal. Also, Scandinavian surgeons sidestep difficult anastomosis due to short renal vein by dividing the internal iliac vein, thus helping them to deliver the external iliac veins to the superficial wound, thus speeding up the anastomosis [4].
Fig. 7.3
Satinsky clamp
Fig. 7.4
The application of the Satinsky clamp helps in gaining vein length. The vein length is gained by procuring the cuff of the vena cava
Regardless of the method of vascular control employed, the major vessels should be dissected all around, prior to securing them (Fig. 7.5).
Fig. 7.5
Whichever method of vascular control is employed, the vessels should be circumferentially dissected prior to securing them
Conclusions
Laparoscopic donor nephrectomy is the preferred mode of renal procurement, and it demands more surgical skill compared to conventional open donor nephrectomy. The need for adequate length of the renal artery on the left side forces the surgeon to use a short renal artery stump. The need for securing the gonadal, lumbar and adrenal venous tributaries makes the situation difficult. The right side poses a problem with the short length of the renal vein.
Nonlocking polymer clips, locking clips, vascular staples and ligatures are utilized in today’s scenario by different institutes, but none of them are considered foolproof. Stapling devices pose probability for missing or malformed staple lines and failure to release. In early branching renal arteries, surgeons find it technically challenging to get multiple renal arteries with graft rather than get the proximal end with single stem. Stapler and NPL are far more expensive than titanium clips. NPL clips increase the graft length; locking mechanism increases security. Titanium clips pose the risk of scissoring, malformation, jamming and dislodgement [19].