Risk factors related to severe birth injury in vacuum extraction delivered infant GA ≥ 37 weeks at Bhumibol Adulyadej Hospital
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Date
2010-03-14
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Royal Thai Airforce Medical Gazette
Abstract
Objective: To identify risk factors of birth injury in pregnant women who delivered by vacuum extraction. Study design: Case control study. Setting: Department of Obstetrics and Gynecology, Bhumibol Adulyadej Hospital. Subjects: 67 pregnant women delivered by vacuum extraction who had birth injury infants and 67 pregnant women delivered by vacuum extraction who had no birth injury of infants at Bhumibol Adulyadej Hospital between January 1, 2004 to December 31, 2006. Main Outcome Measures: Risk factors associated with birth injury were duration of vacuum extraction, indication, maternal parity, gestational age, lack of antenatal care, birth weight and operator. Method: Medical records of 67 pregnant women who were delivered by vacuum extraction and had birth injury of infants were analyzed and compared with the medical records of 67 pregnant women who were delivered by vacuum extraction and infants had no births injury. The expected risk indicators of the case and control group were compared by using independent compare t-test and exact probability test as appropriate. Multiple logistic regression analysis was used to determine the significant risk factor (p \< 0.05). Results: Significant risk factors of birth injury is the duration of vacuum extraction (OR=4.56, 95% CI=1.90-10.91).Conclusion: Risk factor of birth injury in vacuum extraction is duration of extraction. It is useful in categorization of individual women into high and low risk groups in birth injury.
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Royal Thai Airforce Medical Gazette; Vol.54 No.2 May-August 2008; 19