Adolescent Idiopathic Scoliosis (AIS) Gold Standard for Blood Loss

NCT ID: NCT03990376

Last Updated: 2021-06-11

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-06-19

Study Completion Date

2020-09-10

Brief Summary

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The purpose of this study is to establish a benchmark for measuring blood loss by directly measuring the change in red cell volume before and after surgery and to compare established blood loss estimators to this benchmark in order to determine the most accurate and precise method for estimating blood loss in adolescent idiopathic scoliosis surgery patients

Detailed Description

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Bleeding is a necessary and unavoidable part of spine surgery. It is important to the surgeons and anesthesiologists to know how much blood a patient has lost during surgery in order to care for them in the best way possible. Different methodology has been employed to estimate how much blood is lost during surgery, but unfortunately none of the methods used have been reliable. The study will calculate surgical blood loss by determining perioperative change in red cell volume that is directly measured by using a special method that relies on radioisotope I-131-labeled albumin administration (BVA-100) during the surgery. This benchmarked blood loss estimate will then be compared to estimates calculated using the Gross equation, the Bourke and Smith equation, and the Camarasa formula. In addition, blood loss will be estimated volumetrically by utilizing formulas based on the amount of salvaged blood produced by an intraoperative salvaging system (Cell Saver®). Blood loss estimates based on salvaged blood volume will also be compared to the benchmark.

Conditions

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Adolescent Idiopathic Scoliosis

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Participants include 45 adolescent subjects undergoing spinal fusion for correction of idiopathic scoliosis.

After obtaining a baseline sample of 5 mL of blood, 1 mL of I-131-labeled albumin will be injected intravenously over 1 min. At the time the baseline sample is obtained, a hematocrit will be simultaneously acquired. Five milliliter blood samples will then be collected at 12, 18, 24, 30, and 36 min post-injection, and the Plasma volume (PV) will be measured by extrapolating to time zero. This entire process will occur twice per patient: once pre-procedure and once post-procedure.
Primary Study Purpose

OTHER

Blinding Strategy

NONE

Study Groups

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Blood volume assessment with Blood Volume Analyzer

Injections of 1 mL of I-131-labeled serum albumin based on each patient's height and weight - 1 pre-surgical and 1 post-surgical

Group Type OTHER

Radioisotope I-131-labeled albumin

Intervention Type OTHER

1 mL of radioisotope I-131-labeled albumin x 2

Interventions

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Radioisotope I-131-labeled albumin

1 mL of radioisotope I-131-labeled albumin x 2

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Ages 10-17 years old
* Surgery scheduled for posterior spinal fusion correction of idiopathic scoliosis

Exclusion Criteria

* Congenital or neuromuscular scoliosis
* Known coagulopathy or platelet dysfunction
Minimum Eligible Age

10 Years

Maximum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Emory University

OTHER

Sponsor Role lead

Responsible Party

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Nicholas Fletcher

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Nicholas Fletcher

Role: PRINCIPAL_INVESTIGATOR

Emory University

Locations

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Children's Healthcare of Atlanta - Egleston Hospital

Atlanta, Georgia, United States

Site Status

Countries

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United States

Other Identifiers

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IRB00101023

Identifier Type: -

Identifier Source: org_study_id

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