A high blood level in the air trap reduces microemboli during hemodialysis

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Forsberg, UlfUmeå universitet,Medicin (author)

A high blood level in the air trap reduces microemboli during hemodialysis

Article/chapterEnglish2012

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2012-02-23
Wiley,2012
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LIBRIS-ID:oai:DiVA.org:umu-56979
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56979URI
https://doi.org/10.1111/j.1525-1594.2011.01415.xDOI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype

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Previous studies have demonstrated the presence of air microemboli in the dialysis circuit and in the venous circulation of the patients during hemodialysis. In vitro studies indicate that a high blood level in the venous air trap reduces the extent of microbubble formation. The purpose of this study was to examine whether air microbubbles can be detected in the patient's access and if so, whether the degree of microbubble formation can be altered by changing the blood level in the venous air trap. This was a randomized, double-blinded, interventional study of 20 chronic hemodialysis patients. The patients were assigned to hemodialysis with either an elevated or a low blood level in the air trap. The investigator and the patient were blinded to the settings. The numbers of microbubbles were measured at the site of the arteriovenous (AV) access for 2 min with the aid of an ultrasonic Doppler device. The blood level in the air trap was then altered to the opposite setting and a new measurement was carried out after an equilibration period of 30 min. Median (range) for the number of microbubbles measured with the high air trap level and the low air trap level in AV access was 2.5 (0-80) compared with 17.5 (0-77), respectively (P = 0.044). The degree of microbubble formation in hemodialysis patients with AV access was reduced significantly if the blood level in the air trap was kept high. The exposure of potentially harmful air microbubbles was thereby significantly reduced. This measure can be performed with no additional healthcare cost.

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Hematologi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Hematology hsv//eng

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Jonsson, PerUmeå universitet,Medicin(Swepub:umu)pejo0078 (author)
Stegmayr, ChristoferUmeå universitet,Medicin (author)
Stegmayr, BerndUmeå universitet,Medicin(Swepub:umu)best0006 (author)
Umeå universitetMedicin (creator_code:org_t)

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In:Artificial Organs: Wiley36:6, s. 525-5290160-564X1525-1594

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By the author/editor: Forsberg, Ulf; Jonsson, Per; Stegmayr, Christ ...; Stegmayr, Bernd

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Hematology

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By the university: Umeå University

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