NCT03851679

Pulmonary Echography and BNP Value Pre- and Post- Elective Cesarean Section in Spinal Anesthesia

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 80 (actual)
• Sponsor: University of Udine · Academic / Other
• Sex: Female
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Pregnancy is characterized by many biohumoral changes: circulation, respiratory mechanics, oncotic pressure, vascular permeability and many other systems are affected. Vascular permeability is controlled by endothelial glycocalyx. Several factors such as sepsis, ischemia / reperfusion, inflammatory mediators, trauma, surgery including the Cesarean Section and fluid overload can increase vascular permeability due to a glycocalyx damage. During Cesarean Section under subarachnoid anesthesia, hypotension may occur. It is a common side effect caused by reduced preload due to aortocaval compression by the uterus. Furthermore, subarachnoid anesthesia causes block of the sympathetic preganglionic fibers which is associated with vasodilation. These changes often require the use of vasopressors and fluids. A fluid overload associated with the physiological and pathological factors discussed earlier might cause an increased risk of pulmonary edema and acute respiratory failure (IRA) in women undergoing cesarean section under arachnoid anesthesia. IRA occurs in less than 0.2% of total pregnancies but it is one of the most common cause of admission to intensive care unit in pregnant women. Among the causes that can lead to IRA in the last trimester of pregnancy we find pneumopathies such as asthma, pulmonary embolism due to amniotic fluid and pulmonary edema related to severe preeclampsia. Diagnosis of pulmonary edema can be clinical or sub-clinical through laboratory tests such as BNP (b-type natriuretic peptide). It might also be necessary to execute instrumental examinations such as chest radiography (contraindicated in pregnancy) or trans-thoracic ultrasound. Hypothesis: correlation between subarachnoid anesthesia, fluidic therapy and BNP values and ultrasound pattern

Conditions

• Pregnancy Related

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	B-Type natriuretic peptide (BNP) serum values	evaluation BNP serum values: * pre- Cesarean Section (30 minutes before surgery) * post- Cesarean Section (6 hour and 24 hour after surgery)
DEVICE	Pulmonary echography	Pulmonary echography: * pre- Cesarean Section (30 minutes before surgery) * post- Cesarean Section (6 hour and 24 hour after surgery)
OTHER	urine collection	6 hour and 24 hour urine collection after Cesarean Section

Timeline

• Start date: 2016-12-17
• Primary completion: 2018-08-08
• Completion: 2018-11-01
• First posted: 2019-02-22
• Last updated: 2019-02-22