Waltman loop

What is a Waltman loop?

The distal tip of any catheter can be looped back to form a reverse curve catheter.

A Waltman loop is the configuration of a standard catheter when the distal end has been formed into a reverse curve loop.

The simplest technique to do this involves selection of an aortic branch vessel.

The tip is maintained in a constant position as wire and catheter are advanced in unison.

This creates a large reverse curve that can stabilize access and facilitate difficult catheterizations.

The usual ipsilateral approach for uterine artery embolization is to form a Waltman loop.

Newer nonbraided 4-F catheters can be problematic because of their tendency to kink or unfold while the loop is being formed.

Herein, a modification of the Cope suture technique is described by which a Waltman loop is formed with use of a 4-0 Tevdek suture that allows the catheter to be folded back on itself, drawing it into the ipsilateral iliac artery.

If necessary, the catheter can be prevented from unlooping by twisting the catheter on itself to lock it in position.

The technique allows for efficient catheterization of the ipsilateral uterine artery.

The “Waltman loop” refers to a portion of the small intestine, specifically the proximal part of the jejunum, which is sometimes visualized during imaging studies such as upper gastrointestinal (GI) series or abdominal computed tomography (CT) scans.

The loop is named after Dr. Waltman, who first described this anatomic feature. It is identified when there is a segment of the small intestine, often the jejunum, that forms a distinct loop or curve in the abdomen. This loop may be seen during imaging investigations for various reasons, such as evaluating gastrointestinal issues, bowel obstruction, or other abdominal conditions.

The visualization of the Waltman loop is a normal anatomical variant and doesn’t typically represent a pathology in itself. It’s part of the normal arrangement and configuration of the small intestine. However, its appearance may aid radiologists and healthcare professionals in assessing the anatomy of the small bowel and identifying any abnormalities or obstructions that might affect the function of the gastrointestinal tract.

If there are any concerns or specific findings related to the Waltman loop seen during imaging studies, it’s essential to discuss these results with a healthcare provider or a radiologist who can provide a comprehensive interpretation and appropriate guidance based on the individual’s clinical context.


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