Inferior Vena Cava Collapsibility Index Guide for Preoperative Fluid Therapy in Preeclampsia

Ain Shams University

Status: Enrolling

Conditions: Hypotension; Pre-Eclampsia; Fluid Overload

Treatments: Other: fluid therapy, 300 ml of crystalloid Ringer's solution.

Study type: Interventional

Funder types: Other

Identifiers

NCT06539026

FMASU R146/2024

Details and patient eligibility

About

The routine assessment of fluid status depends on clinical evaluation and invasive monitoring. The clinical assessment lacks objectivity and the invasive monitoring carries risks. Point of care ultrasound (POCUS) parameters can be useful as early markers of fluid status and were used in safe fluid assessment in term pregnancy and preeclampsia.

Full description

Fluid therapy in preeclamptic patients presents a challenge. volume expansion may precipitate pulmonary edema while fluid restriction may worsen renal function and may aggravate post-spinal hypotension during cesarean section.

Pre-eclampsia predisposes to maternal mortality. It presents a serious hypertensive disorder during pregnancy which may progress rapidly to serious complications, including the death of both mother and fetus The optimal fluid management strategy constitutes a cornerstone in the management. The Royal College of Obstetricians and Gynecologists (RCOG) guidelines for severe pre-eclampsia recommend restrictive fluid therapy, in keeping with the absence of evidence favoring volume expansion. Restrictive management is advocated by The Society of Obstetric Medicine of Australia and New Zealand (SOMANZ) with additional fluid administration only recommended before intravenous hydralazine, regional anesthesia, immediate delivery, or in oliguric patients where a volume deficit is suspected.

Overall, limited evidence exists regarding the effectiveness of ultrasound assessment of the IVC collapsibility index to guide pre-operative fluid management in critically ill pre-eclamptic patients. A meta-analysis stated that few research trials are available in the obstetric population. Some studies suggest that it can accurately predict fluid responsiveness, but others argue that it may not be helpful.

Our trial is the first trial that compares the efficacy of IVCCI-guided perioperative fluid therapy against standard fluid therapy guided by clinical parameters in critically ill pre-eclamptic patients.

Enrollment: 90 estimated patients

Sex: Female

Volunteers: No Healthy Volunteers

Inclusion criteria

• Critically ill pre-eclamptic patients for cesarean section

Exclusion criteria

• Patient refusal
• severe cardiovascular disease ( ejection fraction < 40 mmHg ), tricuspid regurge.
• contraindication for spinal anesthesia.
• failure to perform spinal anesthesia.
• severe hepatic.
• renal dysfunction

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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90 participants in 2 patient groups

IVCCI-guided fluid therapy

Experimental group

Description:

the participants in this group will receive crystalloids according to the IVCCI assessment as follows: 1. If ≥ 50 % a bolus will be given 300 ml by dripping within 30 minutes, the fluid will be repeated by half the amount if needed to reach equal or less than 40% collapsibility. 2. If \< 50 % or B line finding in lung ultrasound no bolus will be given.

Treatment:

Other: fluid therapy, 300 ml of crystalloid Ringer's solution.

Conventional fluid therapy

No Intervention group

Description:

the participants in this group will receive the standard regimen; no routine additional fluid within half an hour before surgery only the fixed maintenance of 80-100 ml/hr.