Simple instrument for measuring cervical dilatation during labour

Simple instrument for measuring cervical dilatation during labour

The construction of a simple disposable instrument for the measurement of cervical dilatation is described. The instrument consists of two clips, a measuring tape and a flexible tube. The measuring tape is fixed to one clip and threaded through the flexible tube, which is fixed to the other clip. Th...

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Veröffentlicht in:Physiological measurement 2005-02, Vol.26 (1), p.N1-N7
1. Verfasser: Letić, Milorad
Format: Artikel
Sprache:eng
Schlagworte:
Adult
Disposable Equipment
Equipment Design
Female
Humans
Labor Stage, First
Obstetrics - instrumentation
Pregnancy
Sensitivity and Specificity
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creator Letić, Milorad
description The construction of a simple disposable instrument for the measurement of cervical dilatation is described. The instrument consists of two clips, a measuring tape and a flexible tube. The measuring tape is fixed to one clip and threaded through the flexible tube, which is fixed to the other clip. The clips are attached to opposing cervical rims at 3 o'clock and 9 o'clock and the differential displacement of the marking on the measuring tape and free end of the flexible tube is measured. Laboratory measurements were performed in order to determine the error of measurement. The absolute error of measurement with this instrument is 1.5 mm. Clinical measurements were performed on 12 parturients with a single foetus in vertex position and 3 to 4 cm cervical dilatation. The results of measurements were within +/-1 cm error margin of manual assessments. No adverse effects were noted due to the use of the instrument. The instrument did cause minor discomfort to patients during application.
doi_str_mv 10.1088/0967-3334/26/1/N01
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The instrument consists of two clips, a measuring tape and a flexible tube. The measuring tape is fixed to one clip and threaded through the flexible tube, which is fixed to the other clip. The clips are attached to opposing cervical rims at 3 o'clock and 9 o'clock and the differential displacement of the marking on the measuring tape and free end of the flexible tube is measured. Laboratory measurements were performed in order to determine the error of measurement. The absolute error of measurement with this instrument is 1.5 mm. Clinical measurements were performed on 12 parturients with a single foetus in vertex position and 3 to 4 cm cervical dilatation. The results of measurements were within +/-1 cm error margin of manual assessments. No adverse effects were noted due to the use of the instrument. 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The instrument consists of two clips, a measuring tape and a flexible tube. The measuring tape is fixed to one clip and threaded through the flexible tube, which is fixed to the other clip. The clips are attached to opposing cervical rims at 3 o'clock and 9 o'clock and the differential displacement of the marking on the measuring tape and free end of the flexible tube is measured. Laboratory measurements were performed in order to determine the error of measurement. The absolute error of measurement with this instrument is 1.5 mm. Clinical measurements were performed on 12 parturients with a single foetus in vertex position and 3 to 4 cm cervical dilatation. The results of measurements were within +/-1 cm error margin of manual assessments. No adverse effects were noted due to the use of the instrument. 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subjects Adult
Disposable Equipment
Equipment Design
Female
Humans
Labor Stage, First
Obstetrics - instrumentation
Pregnancy
Sensitivity and Specificity
title Simple instrument for measuring cervical dilatation during labour
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