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Surgical Steps and Complications of Laparoscopic Nephrectomy
Laparoscopic nephrectomy has clear advantages over open nephrectomy (less bleeding, postoperative pain, paralytic ileus, wound infection, and incisional hernia) and leads to a faster postoperative recovery of the patient.
Indications for Laparoscopic Nephrectomy
Benign diseases:
Nonfunctioning kidney with symptoms (e.g., bleeding, recurrent infections, nephrolithiasis, hydronephrosis, flank pain or renal hypertension).
Malignant diseases:
Renal cell carcinoma (up to 8 cm in size, depending on location) if partial nephrectomy is not feasible.
Contraindications for Laparoscopic Nephrectomy
Coagulation disorders. Do not perform radical nephrectomy if partial nephrectomy is technically possible, especially in patients with single kidneys, chronic kidney disease, bilateral renal cell cancer, or hereditary renal cell cancer. Choose the open surgical technique for large tumors (size $>$\,8 cm depending on location), lymph node metastasis, or vein thrombus. Consider the retroperiteoscopic or open surgical approach after major abdominal surgery (e.g., hemicolectomy of the same side). The other contraindications depend on the surgical risk due to the patient's comorbidity, the renal function of the contralateral kidney, and the surgical procedure's impact on the patient's life expectancy.
Surgical Technique of Laparoscopic Nephrectomy
Preoperative Preparations:
- Recommend a clear liquid diet on the preoperative day to improve the intraabdominal space.
- Administer an enema the night before surgery.
- Perioperative placement of a urinary catheter and gastric tube.
- Perioperative antibiotic prophylaxis is needed if risk factors for surgical site infections are present or if the urinary tract is planned to be opened.
- Insert a transurethral catheter and gastric feeding tube during surgery.
Surgical Approach Via Laparoscopy
Patient Positioning:
The patient is positioned in a lateral decubitus position at an angle of 45 degrees and with mild lumbar hyperextension. A vacuum mattress enables a secure fixation of the patient, even if the operation table has to be tilted.
Trocar positions:
Create a Pneumoperitoneum with a mini-laparotomy or with the Veress needle next to the umbilicus (camera trocar 10 mm). Insert three additional trocars; see figure below for positions.
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Surgical Approach to the Kidney:
Start with a laterocolic incision for medial reflection of the colon. The correct layer between the meso of the colon and retroperitoneum is found most easily below the kidney. On the right side, mobilize the duodenum from the vena cava (Kocher maneuver). After sufficient colon mobilization, identify and transect the ureter at the crossing with the iliac vessels. Transect the testicular (ovarian) vein on the left side below the lower pole of the kidney, the vessel can be spared on the right side. On the left side, the aorta is followed cranially, on the right side the vena cava, until the renal hilus is reached. Lateral traction on the ureter facilitates the dissection. In case of a suspected malign tumor, lymph node dissection below the renal hilus is now possible.
Transection of the Renal Vessels:
Isolate the renal vessels and send suspicious lymph nodes for pathological examination. The renal vessels are transsected between ligature clips; 2–3 clips should be placed proximally. Alternatively, the renal vessels are transsected with a linear stapling device for vessels (Endo-GIA, 30–45 mm). Another option is to transsect the renal hilus en-block with a long (60 mm) Endo-GIA, see figures below.
Dissection of the Upper Pole:
After transection of the renal vessels, the dissection is continued along aorta/vena cava until the adrenal gland is identified. The fatty tissue between the adrenal gland and capsula adiposa is incised to spare the adrenals. Be careful not to injure the lienal vessels or the pancreatic tail.
Hand-Assisted Technique:
With the help of a special hand port, one hand of the surgeon can enter the abdominal cavity and help with the dissection and retraction. Disadvantageous are the high costs of the disposable item. The hand-assisted technique can also be performed without the hand port: adapt the incision for your hand size; the gas leak can be limited with moist surgical towels. The hand (port)incision is used for intact organ retrieval.
Adrenalectomy:
If oncologically necessary, the adrenalectomy can be carried out without problems with the laparoscopic technique (en bloc with the kidney). The adrenal vessels are clipped or coagulated depending on their size.
Intact Organ Retrieval:
After complete mobilization of the kidney, the organ is deposited in a retrieval bag, which was inserted through the 10 mm trocar. Intact organ retrieval requires a sufficient muscle-spitting incision of the lower abdominal wall. Drainage of the renal fossa is optional.
Regional lymphadenectomy:
Lymphadenectomy is unnecessary for T1–2 tumors without suspicious lymph node enlargement, since no survival benefit could be demonstrated in a large EORTC study (Blom et al., 1999 and 2009). Some authors advocate, based on retrospective studies, lymphadenectomy if advanced tumors or enlarged lymph nodes are present. For enlarged lymph nodes, limited regional lymphadenectomy can be performed laparoscopically, or open surgery should be performed.
Morcellation:
Kidney morcellation should be discouraged in cases with suspected malignancy. For most reported cases with port site metastases, morcellation was used instead of intact organ retrieval. Techniques that prevent tumor cell spillage have been described but not prospectively tested.
Care after Laparoscopic Nephrectomy
General measures:
Early mobilization. Respiratory therapy. Thrombosis prophylaxis. Laboratory controls (Hb, creatinine). Wound inspections.
Analgesia:
Analgesics with a combination of NSAIDs and opioids.
Diet advancement:
Remove of the nasogastric tube and allow small sips of clear liquids after surgery. Increase amounts of clear liquids and allow yoghurt or pudding on postoperative day 1. If the patients feels well, allow small amounts of solid food (appetite driven) starting postoperative day 2.
Drains and catheters:
Quick removal of the bladder catheter after uneventful surgery for stable patients within 12 hours, wound drainage (often unnecessary) for 1–2 days.
Complications
In principle, complication of laparoscopic nephrectomy are comparable to open nephrectomy [see section radical nephrectomy ]. In comparative studies, the laparoscopic technique reduces pain, bleeding, paralytic ileus, surgical site infections, and incisional hernia.
| Open radical nephrectomy | Index | Retroperitoneoscopic nephrectomy |
Index: 1–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
References
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40 (2001), Nr. 1, S. 17–23
Blom u.a. 1999 BLOM, J. H. ; POPPEL, H. van ;
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SCHRODER, F. H. ; PRIJCK, L. de:
Radical nephrectomy with and without lymph node dissection:
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Deutsche Version: Laparoskopische Nephrektomie