Role of Granisetron in Preventing Hypotension After Spinal Anesthesia With Levobupivacaine in Rheumatic Patients Undergoing Elective Cesarean Section

Study Overview
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Brief Summary
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Cardiac disease in pregnancy is a high-risk condition and a major cause of maternal mortality and morbidity. Although direct or immediate death due to cardiovascular disease is rare, it is an important indirect cause of maternal death worldwide, with an attributable rate of two deaths per 100,000 pregnancies. Cardiovascular physiological changes during pregnancy impose an additional load on the cardiovascular system of women with underlying heart disease which increases morbidity and mortality during pregnancy and at the time of delivery. Among cardiac diseases, Rheumatic Heart Disease is the commonest cardiac disease complicating pregnancy.

Detailed Description
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The subarachnoid block is the most used anesthesia technique for conducting a cesarean section. The incidence of hypotension following this procedure is as high as 20-40% in pregnant patients. Similarly, bradycardia is also commonly associated with post-SAB, and the reported incidence is around 13%. Spinal anesthesia results in sympathetic block leading to a decrease in systemic vascular resistance and hypotension. Hypotension caused by subarachnoid block is physiologically compensated by an increase in heart rate. However, if vagus nerve-mediated Bezold-Jarisch reflex gets stimulated, then the cardiac autonomic balance gets shifted towards the parasympathetic nervous system leading to bradycardia, which further precipitates hypotension. Levobupivacaine is a highly potent long-acting local anesthetic with a comparatively slow onset of action. Compared to bupivacaine, it has a lower tendency to block deactivated cardiac sodium and potassium channels with a more rapid rate of dissociation. It has reduced cardiac toxicity on overdose intravenous administration due to its faster protein binding rate. Plain levobupivacaine is isobaric to CSF. One of its advantages is that it has a more expectable spread. Several studies have revealed the reduced occurrence of various side effects (such as nausea, vomiting, bradycardia, and hypotension) when levobupivacaine compared with bupivacaine for spinal anesthesia used for cesarean delivery. It has been suggested to use 12.5-13.5mg levobupivacaine for effective spinal anesthesia for cesarean delivery.

Official Title
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Role of Granisetron in Preventing Hypotension After Spinal Anesthesia With Levobupivacaine in Rheumatic Patients Undergoing Elective Cesarean Section: A Randomized Clinical Trial

Conditions
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Granisetron

Intervention / Treatment
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* Drug: Granisetron Hydrochloride
* Other: 0.9% normal saline


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Rheumatic female patients in the childbearing period scheduled for elective cesarean sections Exclusion Criteria: Patients with eclampsia and pre-eclampsia history, uncontrolled diabetes mellitus, morbid obesity, coagulation abnormalities, vertebral deformities, also patients who refused regional anesthesia, having contraindications to spinal anesthesia

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Group G<br>IV granisetron 1mg | Drug: Granisetron Hydrochloride<br>* IV granisetron 1mg<br>* Other names: granisetron;|
| Placebo Comparator: Group C<br>IV 5ml of 0.9% normal saline | Other: 0.9% normal saline<br>* IV 5ml of 0.9% normal saline<br>* Other names: normal saline;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| post-spinal hypotension, and bradycardia | post-spinal hypotension, and bradycardia in rheumatic patients undergoing elective cesarean section | 24 hours postoperative |