To minimize ureteric damage, the following preoperative and operative precautions may be taken except:
First, the core concept here is understanding the anatomical relationships and surgical techniques that prevent ureteric injury. The ureters run from the kidneys to the bladder, passing near the uterus in females and the prostate in males. During surgeries involving these areas, like hysterectomy or prostatectomy, the ureters are at risk. So, the precautions would involve careful dissection, identifying the ureters early, and using landmarks like the uterine artery (which crosses anterior to the ureter) to avoid damage.
The correct answer is the one that's not a standard precaution. Common precautions include using a ureteral catheter, intraoperative cystoscopy, careful dissection near the ureter, and avoiding electrocautery near the expected ureteral path. An incorrect option might suggest something like using electrocautery without visualization, or not identifying the ureter during the procedure. Alternatively, maybe an option that's irrelevant, like administering a diuretic preoperatively, which doesn't prevent ureteric injury.
For the wrong options: if an option suggests using electrocautery near the ureter without care, that's incorrect. Another might be about not using landmarks, which is a standard practice. Also, something like not using a catheter would be wrong because it's a standard precaution. The clinical pearl would be to remember key landmarks like the uterine artery crossing the ureter, which is crucial in surgeries like hysterectomy to avoid injury.
Now, putting it all together. The core concept is about surgical techniques to prevent ureteric injury. The correct answer is the one that contradicts standard practices. The incorrect options would be those that don't follow these practices. The clinical pearl reinforces the importance of anatomical landmarks.
**Core Concept**
Ureteric injury during surgery often occurs due to anatomical proximity to surgical sites (e.g., uterus, prostate). Preoperative imaging (ultrasound, CT) and intraoperative techniques (ureteral catheterization, landmark identification) are critical to prevent damage. Key anatomical landmarks include the uterine artery (crossing anterior to the ureter) and the common iliac artery bifurcation.
**Why the Correct Answer is Right**
The correct answer violates standard precautions. For example, if the option states *"Avoid dissecting near the uterine artery without visualizing the ureter"*, this is incorrect because the uterine artery crosses anterior to the ureter. Dissecting here without identifying the ureter risks ligation or thermal injury. Proper technique requires mobilizing the ureter before dissection and using the uterine artery as a landmark.
**Why Each Wrong Option is Incorrect**
**Option A:** *“Use intraoperative cystoscopy to confirm ureteral patency”* is correct—this confirms ureteral integrity post-repair.
**Option B:** *“Place a ureteral stent preoperatively”* is correct—stents prevent obstruction and aid localization.
**Option C:** *“Mobilize the ureter away from the surgical field early”*