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Gastric emptying is delayed at 8-12 weeks' gestation
D M Levy1, O A Williams, A D Magides
1Department of Surgical and Anaesthetic Sciences, University of Sheffield, Royal Hallamshire Hospital.
British Journal of Anaesthesia
|August 1, 1994
Summary
Pregnancy at 8-12 weeks gestation significantly delays gastric emptying, as shown by slower paracetamol absorption. This finding is crucial for understanding drug efficacy during early pregnancy.
Area of Science:
- Pharmacology
- Gastroenterology
- Obstetrics
Background:
- Gastric emptying influences drug absorption and efficacy.
- Understanding physiological changes in early pregnancy is vital for maternal and fetal health.
Purpose of the Study:
- To investigate the effect of early pregnancy (8-12 weeks gestation) on gastric emptying.
- To assess paracetamol absorption as an indirect measure of gastric emptying in pregnant individuals.
Main Methods:
- A comparative study involving 20 pregnant patients (8-12 weeks gestation) and 20 non-pregnant controls.
- Oral administration of 1.5g paracetamol tablets with water.
- Serial blood sampling at 15-minute intervals for 2 hours to measure paracetamol concentration.
Main Results:
- Pregnant patients exhibited a significantly lower maximum paracetamol concentration.
- The time to reach maximum paracetamol concentration was significantly prolonged in pregnant individuals.
- Smaller areas under the paracetamol time-concentration curves were observed in the pregnant group at 60 and 120 minutes.
Conclusions:
- Early pregnancy (8-12 weeks gestation) is associated with delayed gastric emptying.
- Altered gastric emptying in early pregnancy may impact the absorption and therapeutic effectiveness of orally administered medications like paracetamol.