Assess a bile duct stricture or ureteral stricture
Whitaker test allows for an objective measurement of ureteral or bile duct obstruction. The procedure is performed by injecting the bile ducts (Biliary drain) or nephrostomy tube with a certain amount of contrast cc/minute for 2-5 minutes each sitting for a total predetermined volume and assessing the rise in pressure in the biliary tree or within the kidney. this helps assess whether there is a blockage of the outflow downstream of the site of injection (ie. if there is a ureteral or biliary stricture or obstruction). The whitaker test helps identify if there is a need for biliary obstruction treatment/ureteral obstruction treatment in the setting of a benign biliary or ureteral stricture
BILIARY WHITAKER PRESSURE FORM
Patient Info
Biliary tube#: _______________ Baseline Pressure_____________
CC/MINUTE TOTAL TIME VOLUME PRESSURE
2cc 5 minutes 10cc
4cc 5 minutes 20cc
8cc 5 minutes 40cc
15cc 3 minutes 45cc
20cc 2 minutes 40cc
*Normal Study — pressures are <20-30 cm H2O rise from baseline pressure.
Frequently Asked Questions
What is a Whitaker test used for?
A Whitaker test is used to objectively measure obstruction in the bile duct or ureter. By injecting contrast into the biliary or nephrostomy tube and monitoring the pressure rise, doctors can determine if there is a blockage downstream, such as a stricture, and assess the need for treatment.
During a Whitaker test, a clinician injects contrast fluid at a specific rate into the bile ducts or kidney via a biliary drain or nephrostomy tube. The process is monitored over 2-5 minutes to observe any pressure changes, which indicate potential obstructions in the bile duct or ureter.
What does a normal Whitaker test result look like?
A normal Whitaker test result shows a pressure rise of less than 20-30 cm H2O from the baseline pressure. This indicates that there is no significant obstruction in the bile duct or ureter, and that fluid is flowing properly.
What might a high-pressure reading in a Whitaker test indicate?
A high-pressure reading during a Whitaker test suggests a potential obstruction, such as a stricture, in the bile duct or ureter. This could mean that the outflow is blocked, requiring further investigation or treatment to prevent complications.
Why would someone need a Whitaker test?
A Whitaker test may be needed if a patient is suspected of having a bile duct or ureteral obstruction. Symptoms might include pain, jaundice, or kidney issues, prompting the need to assess whether there is a blockage impeding normal fluid drainage.
What are the risks associated with a Whitaker test?
The risks of a Whitaker test are generally low, but may include infection, bleeding, or discomfort at the injection site. It's important for patients to discuss these risks with their healthcare provider prior to the procedure.
How should patients prepare for a Whitaker test?
Preparation for a Whitaker test typically involves fasting for a few hours beforehand and arranging transportation post-procedure due to possible sedation effects. Patients should follow their healthcare provider's specific instructions for the best outcomes.
What happens after a Whitaker test?
After a Whitaker test, patients are usually monitored for a short period to ensure there are no immediate complications. Results will be analyzed by the healthcare provider, who will discuss the findings and any necessary next steps or treatments.