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Renogram Study With Percutaneous Nephrolithotomy (PERC): Alterations in Renal Blood Flow as a Consequence of PERC

NCT00169741 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 4

Last updated 2016-02-23

No results posted yet for this study

Summary

Patients with large or otherwise complex renal calculi are commonly treated by percutaneous nephrolithotomy (PNL; PERC). PERC requires the creation of an approximately 10 mm channel through the renal parenchyma, into the intra-renal collecting system, in order to effect stone fragmentation and extraction. Although the nephrostomy tract is confined to a small fraction of the renal parenchyma (approximately 1%), the trauma associated with the creation of the tract will affect blood flow and oxygen delivery to regions beyond the immediate site of injury. It is possible that this could result in a significant functional renal impairment. There are several reports describing the effect of PERC on renal function, but interpretation of these studies is difficult, due to a lack of uniformity in patient selection and variability in the timing of peri-operative evaluation. Recent data from the investigators' lab, obtained from a porcine model, suggest that, acutely, PERC causes a significant decrease in renal function as measured by para amino hippurate (PAH) clearance. The purpose of this study is to determine, in a rigorous and standardized fashion, the acute effects of PERC on renal function, as measured by nuclear renography.

Conditions

  • Renal Calculi

Interventions

OTHER

Renogram

Subjects who enroll in this study will undergo a nuclear scan called a renogram to assess renal function prior to surgery (baseline), approximately one hour after surgery (to assess percutaneous effects on renal function) and finally approximately 6 weeks post-operatively (to assess return to baseline).

Sponsors & Collaborators

  • Indiana Kidney Stone Institute

    lead OTHER

Principal Investigators

  • James E Lingeman, MD · IU Health Physicians Urology

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2005-05-31
Primary Completion
2016-02-29
Completion
2016-02-29

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00169741 on ClinicalTrials.gov