The Effect of the Open-glottis (Spontaneous) Pushing Technique Versus the Closed-glottis (Valsalva) Pushing Technique in the Second Stage of Labor on Fetal Acid-base Level and Maternal Outcomes: a Randomized Controlled Trial
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Ataturk University
- Enrollment
- 162
- Locations
- 2
- Primary Endpoint
- questionnaire-Postpartum Interview Form
Study Overview
Brief Summary
Pushing has been discussed for decades, primarily in terms of facilitating care in the second stage of labor and maternal/fetal outcomes.
Valsalva-type pushing is the pushing performed by a pregnant woman by holding her breath. Various physiological findings argue against the Valsalva maneuver may adversely affect the acid-base balance and cerebral oxygenation of the fetus. It has been shown that a long apnea period (long closed glottis) associated with the Valsalva maneuver during the expulsive stage of labor increases lactate concentration in the mother and the fetus and adversely affects the fetal acid-base balance.
Spontaneous pushing is the pushing movements that occur naturally in the second stage of birth. Spontaneous pushing is part of the natural birth process and encourages women to trust the natural functioning of their bodies. When pushing with an open glottis, fetal placental circulation is preserved since the pressure on the chest does not increase and there are fewer hemodynamic effects.
The World Health Organization (WHO) recommends that women in the second stage of labor should be encouraged and supported to follow their pushing urges. The WHO states that healthcare professionals involved in obstetric care should avoid the Valsalva maneuver due to the lack of evidence that this technique has any benefit in the second stage of labor. The WHO supports spontaneous pushing in its recommendations for a positive birth experience. Safe termination of labor for both the mother and fetus is one of the primary duties of all healthcare professionals. There are few studies examining the maternal and fetal effects of the pushing types used during labor, especially their effects on the acid-base balance in the fetus. To contribute to the quality of evidence on the subject, the effects of Valsalva-type and spontaneous pushing techniques in the second stage of labor on fetal acid-base level and maternal outcomes were examined.
Hypotheses of the Research H1: Spontaneous pushing reduces the mother's pain level. H2: Spontaneous pushing increases the mother's birth satisfaction. H3: Spontaneous pushing positively affects the acid-base balance of the fetus. H4: Valsalva-type pushing increases the mother's pain level. H5: Valsalva-type pushing reduces the mother's birth satisfaction. H6: Valsalva-type pushing negatively affects the acid-base balance of the fetus.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Other
- Masking
- Single (Participant)
Eligibility Criteria
- Ages
- 18 Years to 40 Years (Adult)
- Sex
- Female
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Being at least a primary school graduate, being between the 38th and 42nd weeks of gestation, having a single fetus in a vertex position, giving vaginal birth, not developing any complications during labor, and volunteering to participate in the study.
Exclusion Criteria
- •High-risk pregnancy, developing complications during labor, and having a diagnosed psychiatric disease.
Outcomes
Primary Outcomes
questionnaire-Postpartum Interview Form
Time Frame: During the data collection period of 7 months
for mother's birth satisfaction Postpartum Interview Form: It is a form consisting of questions that include women's opinions about the pushing type applied during labor. The postpartum interview form was applied to women in the experimental and control groups during the fourth stage of labor.
Visual Analogue Scale (VAS)
Time Frame: During the data collection period of 7 months
for labor pain level Visual Analogue Scale (VAS): It is used to measure the intensity of pain in the patient. The VAS is a measurement tool that is frequently and safely used to evaluate labor pain. The VAS is 10 cm long. Women were asked to score pain from zero to 10. A zero score means no pain, while 10 means the most severe pain experienced. Pain level was evaluated with the VAS in the 2nd Stage of Labor.
blood samples-Examination of blood samples in the laboratory
Time Frame: During the data collection period of 7 months
acid-base balance of the fetus In the experimental and control groups, after the umbilical cord was clamped in the third stage of birth, 1 cc blood samples were taken from the umbilical blood. Blood samples for fetal acid base measurement were taken in the 3rd stage of labor.
Secondary Outcomes
No secondary outcomes reported
Investigators
Ayla Kanbur
Principal Investigator (Assoc. Dr.)
Ataturk University