PMID: 7546790Jul 1, 1995Paper

New miniaturized versus conventional biplane transesophageal transducers: recent clinical experience in adults

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
H LambertzM Stellwaag

Abstract

A subset of patients have substantial discomfort on examination with transesophageal echocardiography with the conventional probe, whereby the dimensions of the probe play a decisive role. Miniaturized biplane transducers have recently become available (2 x 32 channels, dimensions 9.5 x 8.7 mm, and circumference approximately 30% less than the conventional echoscope) and allow ultrasound examination at 3.5, 5.0 and 7.0 MHz. A prospective study was carried out in 90 patients to compare difficulties on insertion of the probe, subjective evaluation by the patient during examination, and the two-dimensional image, as well as Doppler and color-coded Doppler quality of the miniaturized biplane versus the conventional probe. In 62 patients, intubation of the esophagus proved less difficult with the smaller instrument and more difficult in nine cases. Seventy-six patients reported that they suffered less discomfort on use of the narrow instrument. Concomitant parasympatholytic medication was needed with the smaller probe in seven cases and 17 times with the conventional probe. As anticipated, quality of the two-dimensional image attained by the miniaturized probe was lower. With transmit/receive frequency of 7.0 MHz, however, image res...Continue Reading

References

Nov 1, 1991·Journal of the American College of Cardiology·E A FisherM E Goldman
Sep 1, 1990·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·R C BansalP M Shah
Mar 31, 1989·Deutsche medizinische Wochenschrift·P HanrathW Krüger
Apr 16, 1993·Deutsche medizinische Wochenschrift·H Lambertz, T Menzel

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Citations

Mar 24, 1998·Journal of Cardiothoracic and Vascular Anesthesia·M M ZestosE Mossad

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