Calibrated delivery drape versus indirect gravimetric technique for the measurement of blood loss after delivery: a randomized trial

BMC Pregnancy and Childbirth

Beverly Winikoff²  Kurus Coyaji¹  Hillary Bracken²  Tara Shochet²  Shubha Ambardekar¹ 

[1] Department of Obstetrics & Gynecology, K.E.M. Hospital, Pune, India;Gynuity Health Projects, New York, NY, USA

关键词: Postpartum blood measurement;    Postpartum blood loss;   

Others  :  1125642
DOI  :  10.1186/1471-2393-14-276

 received in 2013-07-01, accepted in 2014-08-05,  发布年份 2014

【 摘 要 】

Background

Trials of interventions for PPH prevention and treatment rely on different measurement methods for the quantification of blood loss and identification of PPH. This study’s objective was to compare measures of blood loss obtained from two different measurement protocols frequently used in studies.

Methods

Nine hundred women presenting for vaginal delivery were randomized to a direct method (a calibrated delivery drape) or an indirect method (a shallow bedpan placed below the buttocks and weighing the collected blood and blood-soaked gauze/pads). Blood loss was measured from immediately after delivery for at least one hour or until active bleeding stopped.

Results

Significantly greater mean blood loss was recorded by the direct than by the indirect measurement technique (253.9 mL and 195.3 mL, respectively; difference = 58.6 mL (95% CI: 31–86); p < 0.001). Almost twice as many women in the direct than in the indirect group measured blood loss > 500 mL (8.7% vs. 4.7%, p = 0.02).

Conclusions

The study suggests a real and significant difference in blood loss measurement between these methods. Research using blood loss measurement as an endpoint needs to be interpreted taking measurement technique into consideration.

Trial registration

This study has been registered at clinicaltrials.gov as NCT01885845.

【 授权许可】

   
2014 Ambardekar et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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