Which position is favorable for intravenous pyelography?

BSF Staff Nurse - 2015

Medical & Surgical Nursing

Easy

Appeared in: BSF Staff Nurse - 2015

Explanation

Intravenous Pyelography (IVP) is a radiological procedure to visualize the urinary tract.
The standard and initial position for this procedure is supine (lying flat on the back).
This position allows for the best anatomical alignment and a clear, unobstructed view of the kidneys, ureters, and bladder on X-ray films.
While other positions may be used adjunctively, supine is the primary and most favorable position for the overall examination.

Option B: The Trendelenburg position (head down, feet up) is not the primary position for IVP. It is used only temporarily during the procedure to help retain contrast in the upper urinary tract by countering gravity, not for the entire examination.
Option C: The lithotomy position involves lying on the back with legs raised and supported in stirrups. This is incorrect for IVP as it does not offer a clear view of the kidneys and ureters.
Option D: The left lateral position (lying on the left side) would obscure the view of the urinary tract with other organs and is not used for a standard IVP.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Patient positioning for diagnostic procedures as background academic context rather than a clinical decision trigger.
Correct patient positioning is a fundamental nursing responsibility that ensures the quality of diagnostic tests and patient safety. Incorrect positioning can lead to non-diagnostic images, requiring repeat procedures and increased radiation exposure.
A key nursing role before an IVP is to conduct a thorough allergy assessment, specifically for iodine and shellfish, as the contrast medium is iodine-based and can cause severe allergic reactions.
Post-procedure, nurses must prioritize and promote hydration to facilitate the excretion of the contrast dye, thereby preventing contrast-induced nephropathy (kidney damage).

How to Approach the Question

First, identify the key procedure in the question: 'Intravenous Pyelography' (IVP).
Recall the purpose of an IVP: to visualize the entire urinary system (kidneys, ureters, bladder).
Consider the standard anatomical position for viewing abdominal and pelvic organs via X-ray. The most logical position is one that lays the body flat for a clear anteroposterior view.
Evaluate the options: Supine (flat on back), Trendelenburg (head down), Lithotomy (legs in stirrups), and Lateral (on side).
Eliminate positions that are clearly for other purposes (Lithotomy for perineal access, Lateral for side access).
Differentiate between the primary position (Supine) and an adjunctive position (Trendelenburg), recognizing that the question asks for the 'favorable' or standard position for the overall procedure.

Concept Tested & Keywords

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 1 pp. 92-94, 106-108

E6 Nursing Fundamentals Taylor p. 211-213