Air as a contrast marker for ultrasound-guided fetal transfusions.

Lee, T G; Knochel, John Q.; Kochenour, Neil K.

doi:10.1148/radiology.138.2.7455137

Cited by 3 publications

(1 citation statement)

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“…As more experience was gained, some centers felt that the final step, infusion of dye into the fetal peritoneal cavity after needle placement (to confirm free placement within the cavity and not within an isolated area), was unnecessary. Documentation of needle placement within the fetal peritoneal cavity, using ul trasound alone, includes using air or agitated saline (containing small bubbles) as ultra sonic contrast media [3,4]. If the tip of the needle or catheter is free in the peritoneal cavity, the air will rise unobstructed to the point in the fetal abdomen nearest the ma ternal abdominal wall -the highest point in the woman lying supine for IPT.…”

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confidence: 99%

Current Technique of Intraperitoneal Transfusion: Do Not Throw Away the Renografin

et al. 1989

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The original description of intraperitoneal transfusion calls for contrast-dye infusion and X-ray confirmation of placement of the needle free in the peritoneal cavity. Ultrasound methods, using air or saline as contrast media, have been described to replace the X-rays. This report illustrates at least one way in which the ultrasound findings at intraperitoneal transfusion may be illusory, allowing misplaced transfusion into the fetal colon. In specific instances, use of radiopaque dye at intraperitoneal transfusion may still be helpful.

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confidence: 99%