Skin perfusion in pregnancy

Area of Science:

• Physiology
• Obstetrics
• Vascular Biology

Background:

• Pregnancy involves significant cardiovascular adaptations.
• Objective measurement of skin blood flow during gestation is crucial for understanding physiological changes.
• Previous studies have suggested alterations in peripheral circulation during pregnancy.

Purpose of the Study:

• To objectively measure changes in skin perfusion throughout pregnancy.
• To compare skin perfusion in pregnant versus nonpregnant women.
• To investigate the impact of gestational hypertension and the supine pressor test on skin blood flow.

Main Methods:

• Utilized photoelectric flow sensing for direct, objective measurement of skin perfusion.
• Monitored 42 pregnant women and 20 nonpregnant controls.
• Assessed skin perfusion in different positions and in relation to the supine pressor test.

Main Results:

• Skin perfusion increased significantly starting at 16 weeks of gestation.
• Maximum increase in skin perfusion (3-4 times control) observed between 20-30 weeks.
• Perfusion remained elevated at least 1 week postpartum.
• No significant difference in perfusion between normal and hypertensive pregnant groups.
• Significant decrease in perfusion in the supine position for patients with a positive supine pressor test.

Conclusions:

• Pregnancy is characterized by a distinct pattern of increased skin perfusion.
• This increase in skin blood flow appears inversely related to increased peripheral resistance during pregnancy.
• The supine pressor test may indicate altered vascular responses affecting skin perfusion in pregnant individuals.