VALIDATION OF THE VIBe INTRAOPERATIVE BLEEDING SCALE IN LIVER SURGERY

May 6, 2022 updated by: Mario Serradilla, MD, FACS, Hospital Miguel Servet

VALIDATION OF THE VIBe INTRAOPERATIVE BLEEDING SCALE IN LIVER SURGERY. PROSPECTIVE AND MULTICENTRIC STUDY

Surgical hemostasis has become one of the fundamental principles for the advancement of surgery. The use of hemostatic agents is standard in many surgical specialties, although the lack of consensus or standardized classifications to determine intraoperative bleeding has led to their inappropriate selection on many occasions. The recommendations of international organizations highlight the need for a bleeding severity scale validated in clinical studies that allows selecting the hemostatic agent that best suits each case.

Study Overview

Status

Not yet recruiting

Conditions

Detailed Description

Surgical hemostasis has become one of the fundamental principles for the advancement of surgery. The use of hemostatic agents is standard in many surgical specialties, with greater use in major surgeries. Inadequate hemostasis significantly increases the risk of perioperative morbidity and mortality, healthcare costs and the use of resources. The need for hemostasis has led to the development of various topical hemostatic agents.

Clinical studies that have analyzed the use of topical hemostats have not used standardized definitions or classifications to determine the severity of intraoperative bleeding, partly due to a lack of consensus on the definition of the severity of bleeding and partly due to the severity of bleeding. lack of requirements to do so. This has led many surgeons to an inadequate selection of hemostats for different bleeding situations, the results being inefficient. Using standardized criteria, the results of clinical studies can be compared to determine the effectiveness of hemostatic agents.

The FDA (Food and Drug Administration) requires the use of a bleeding severity scale validated in clinical studies investigating hemostatic agents. The VIBe (Validated Intraoperative Bleeding Scale) for intraoperative bleeding was developed in 2017.This scale has been validated by a large number of expert surgeons from all specialties, but in an animal model. However, it has not yet been clinically validated.

Liver surgery is one of the surgeries where intraoperative bleeding is more important. In Spain, around 5000 liver resections are performed annually, not including liver transplants. It is, therefore, a perfect framework to validate the applicability of the VIBe scale of severity of intraoperative bleeding.

In order to evaluate the viability of a prospective clinical study in liver surgery, a parallel project has been worked on based on the evaluation of the applicability of the VIBe scale, carried out by liver surgeons by reviewing the original video recordings described in the VIBe scale. Forty-seven surgeons were selected from 10 medium-high-volume liver surgery centers, all of them reference centers (same centers that will participate in the prospective study). 5 of the 10 hospitals perform liver transplants. These centers have a mean reference population of 922,506 ± 225,603 patients. The mean number of major hepatectomies per year is 23 ± 16, the number of minor hepatectomies 56 ± 24, and the number of liver transplants 40 ± 27. 40.5% of all hepatectomies are performed by a minimally invasive approach.

The 47 surgeons viewed 14 videos used by Lewis et al. for the validation of the original VIBe scale. 63.3% of the participating surgeons were men with a mean age of 41.6 years. 17% were unit / department heads and 83% were senior surgeons. The mean experience was 9.3 years, and the majority were experts (21.3%) or with advanced knowledge (53.2%) in minimally invasive surgery. Only 23.4% had prior knowledge of the VIBe scale, but all surgeons used hemostats in their daily clinical practice. The VIBe scale achieved a mean intraobserver agreement of 0.985 and an interobserver agreement of 0.929, neither of which was influenced by the experience of the surgeon or the volume of surgeries per year. The average rating for all videos was 67% correct, in line with the original validation. Most surgeons considered that the scale represented the range of severity of bleeding in their procedures (91%), relevant to assess intraoperative hemostasis in clinical studies (96%) and clinical practice (87.2%), useful in CMI (96%), and also to differentiate hemostatic agents (81%).

With these preliminary data, based on the video classification exercise, we can conclude that the VIBe scale is useful for the assessment of the severity of bleeding performed by liver surgeons. Therefore, an assessment of the severity of intraoperative bleeding using the scale in actual liver surgery is feasible. Our goal is to publish these results independently before starting the clinical observation record.

To evaluate the clinical applicability, a prospective registry of patients undergoing liver surgery has been designed in the 10 selected Spanish centers. Demographic and preoperative, intraoperative and postoperative data will be collected. Intraoperative bleeding will be measured according to the VIBe scale at two points of the surgical intervention: the maximum bleeding and at the end of the surgery. Data will be collected on the type of hemostatic or surgical strategy that has been carried out to correct bleeding (i.e. pressure, suture, coagulation, hemostatic, etc.) and other data related to bleeding (blood loss, units of blood transfused, etc.). Postoperative complications will be classified according to the Clavien-Dindo classification and the CCI (Comprehensive Complication Index). Major complications are defined as those with a Clavien-Dindo ≥ IIIa. The classification of liver failure and postoperative bleeding are defined following the International Study Group of Liver Liver Surgery (ISGLS) classifications. At the end of the registration a statistical analysis of the data will be performed to determine the applicability and usefulness of the VIBe scale in liver surgery, as well as to determine the relationship between the type of bleeding, the hemostatic measurements used, the success rate of the hemostatic measurements, and the bleeding-related complications.

Despite the extensive literature published on liver surgery, there is no scientific evidence that allows us to have validated scalds that quantify the severity of intraoperative bleeding and, consequently, select which is the best hemostatic procedure that is adapted to each case. All of this has repercussions on patient safety, increased postoperative morbidity and mortality, as well as the inappropriate use of healthcare resources and consequently increased costs.

This prospective multicenter study in national centers that perform Liver Surgery aims to evaluate and validate a scale that allows quantifying intraoperative bleeding in liver surgery.

Study Type

Observational

Enrollment (Anticipated)

259

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Spain
      • Zaragoza, Spain, 50008
        • Mario Serradilla Martín
        • Contact:
          • Mario Serradilla Martin, MD, FACS
        • Principal Investigator:
          • Serradilla-Martin Mario, MD, FACS
      • Zaragoza, Spain, 50012
        • Daniel Aparicio Lopez

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

This registry includes all the elderly patients operated on in the participating Spanish centers who underwent liver surgery in the period described and that meet the inclusion criteria.

Description

Inclusion Criteria:

  • Patients age ≥ 18, scheduled for liver surgery, by open or minimally invasive approach, regardless of diagnosis;
  • ASA score <4
  • They have signed the informed consent.

Exclusion Criteria:

  • Patients with contraindications for liver surgery
  • Emergency surgical interventions
  • Patients <18 years
  • Patients who have not signed the informed consent.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
To validate the VIBe scale.
Time Frame: 30 days
To validate the VIBe scale for intraoperative bleeding in liver surgery.
30 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Usefulness of the scale
Time Frame: 30 days
Assess the repeatability, reproducibility and usefulness of the scale in this type of surgery.
30 days
Determine the relationship between type of bleeding and hemostatic used, the success rate of hemostatic measurements, and complications related to bleeding.
Time Frame: 30 days
Determine the relationship between type of bleeding and hemostatic used, the success rate of hemostatic measurements, and complications related to bleeding.
30 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Hospital Miguel Servet

Collaborators

Spanish Association of Surgeons (AEC)

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

July 1, 2022

Primary Completion (Anticipated)

January 1, 2023

Study Completion (Anticipated)

April 1, 2023

Study Registration Dates

First Submitted

May 6, 2022

First Submitted That Met QC Criteria

May 6, 2022

First Posted (Actual)

May 11, 2022

Study Record Updates

Last Update Posted (Actual)

May 11, 2022

Last Update Submitted That Met QC Criteria

May 6, 2022

Last Verified

May 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • PI21-510

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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