Heavy bleeding after childbirth (postpartum haemorrhage) Heavy bleeding after childbirth is also known as postpartum haemorrhage (PPH), and is an emergency complication of childbirth. Postpartum haemorrhage is defined as a loss of 500ml or more blood from the genital tract in the first 24 hours after giving birth.
The afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems.They play an important role in the regulation of blood pressure as a part of the tubuloglomerular feedback mechanism.he afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems.
When Arterioles are in series, the combined Resistance is higher than the individual Resistances. The Afferent Arteriole is in Series with the Efferent Arteriole. Increasing the Resistance of EITHER ONE increases the Total Resistance of the Kidney and reduces Renal blood flow (& vice versa).onstriction of BOTH Afferent & Efferent Arterioles, with preferential Constriction of the Efferent Arteriole. This results in a massive reduction in RBF/RPF and an increased in GFR. These are active under pathologic conditions (e.g. hemorrhage) NOT physiologic conditions.