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

NCT03851679 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 80

Last updated 2019-02-22

No results posted yet for this study

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

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

Sponsors & Collaborators

  • University of Udine

    lead OTHER

Eligibility

Min Age
18 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2016-12-17
Primary Completion
2018-08-08
Completion
2018-11-30

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03851679 on ClinicalTrials.gov