Publications by authors named "Alexandra E Perks"
Objectives: To determine the correlation between the renal blood flow (RBF) and tissue oxygenation (PO(2)) at varying intra-abdominal pressures (IAPs) and to compare the effects on renal blood flow from carbon dioxide-induced pneumoperitoneum.
Methods: Carbon dioxide pneumoperitoneum was established in Sprague-Dawley rats (n = 6). Licox oxygen/temperature tissue probes were laparoscopically inserted into the renal parenchyma, with the renal PO(2) and RBF recorded every 30 seconds while the IAP was gradually increased.
Background: As laparoscopic partial nephrectomy increases in prominence, more needs to be understood about the combined effect of the pneumoperitoneum and renal ischemia during tumor resection. The purpose of this study is to investigate the effect of combined renal hilar clamping (arterial only versus arteriovenous) and retrograde intrarenal cooling on renal temperature and oxygenation in a porcine laparoscopic partial nephrectomy model.
Materials And Methods: Under general anesthesia, laparoscopic access with intra-abdominal pressure of 15 mm Hg to the left renal hilum was obtained.
Objectives: To determine whether stone attenuation and the skin-to-stone distance (SSD) can predict for stone fragmentation by SWL independently. Identifying the factors predictive of shock wave lithotripsy (SWL) outcome would help streamline the care of patients with stones.
Methods: A retrospective review was performed of 111 patients undergoing initial SWL for a solitary, 5-20 mm, renal calculus.
Purpose: Ureteral stents are commonly inserted under fluoroscopic guidance. Our objective was to determine the intravesical landmarks for stent insertion by mapping the fluoroscopic location of the ureteral orifices (UOs) and bladder neck (BN) in relation to the pubic symphysis (PS).
Methods: In patients undergoing ureteroscopy, the UO to BN distance was measured during cystoscopy with a 5F ureteral catheter.
Purpose: We studied the impact of stented and unstented ureteroscopy on unplanned emergency room (ER) return visits, medical costs, and whether use of a ureteral access sheath precluded uncomplicated ureteroscopy.
Patient And Methods: A series of 161 consecutive patients undergoing ureteroscopy for renal or ureteral stones was evaluated retrospectively. We examined sex, age, stone size, stone location, use of a ureteral access sheath, use of a ureteral stent, unplanned ER visits, unplanned imaging, and interventions.
Purpose: We reviewed our experience with the Dornier Doli S lithotriptor to address 2 questions. 1) What is the stone-free rate? 2) Can a stone-free outcome be predicted by preoperative computerized tomography?
Materials And Methods: The records of 76 consecutive patients undergoing shock wave lithotripsy for solitary urinary calculi 5 to 20 mm in diameter were studied retrospectively. Pretreatment noncontrast computerized tomography was reviewed to determine Hounsfield density.
Objectives: To use the Female Sexual Function Index (FSFI) to compare female sexual dysfunction in patients with interstitial cystitis/painful bladder syndrome (IC) with that in controls.
Methods: Consecutive patients with IC and asymptomatic controls were tested for voiding diary voided volumes, Pelvic Pain and Urgency/Frequency Questionnaire scores, and FSFI scores.
Results: Of the 97 subjects, 75 had IC and 22 were controls.