Effect of Fasting on the Non-invasive Measurement of the Body's Water

Status Completed

Clinical Trial Summary

Preoperative fasting is defined as refraining from food for at least 6 hours and clear fluids for at least 2 hours prior to anaesthesia. On the one hand, it is a procedure that reduces the risk of aspiration of food content and the occurrence of Mendelson's syndrome, and on the other hand, it was considered to be the cause of disturbances in water management in patients undergoing general anaesthesia. However, reports from recent years have found that moderate preoperative fasting does not influence the risk of hypovolemia in anesthetized patients. It is also known that in fasting people the total body water is reduced. Thus, it can be assumed that there are mechanisms causing the movement of extravascular water into the lumen of blood vessels. For several years, the Body Composition Monitor (BCM) device for non-invasive measurement of the volume of individual water compartments of the human body has been available on the market. It allows to determine the volume of total body water, intracellular body water and extracellular body water. It is mainly used during dialysis, but it can also be used in other circumstances that require the determination of the body's hydration status. The principle of this method is based on non-invasive bioimpedance measurement with the use of 4 electrodes placed on two extremities. The aim of the study is to determine whether there is a fluid shift between the intracellular and extracellular compartments in people undergoing preoperative fasting. Examination of this issue would allow for the development of hypothesis regarding the optimal perioperative fluid therapy. If there was a shift of fluid from the intracellular space, it seems more rational to supplement fluid deficiencies resulting from starvation with a 5% glucose solution. If, on the other hand, no fluid shift from the intracellular space was detected, which would suggest shifts within the extracellular space, it would be advisable to hydrate the patient with crystalloid solutions.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT04665349
Study type	Interventional
Source	Medical University of Gdansk
Contact
Status	Completed
Phase	N/A
Start date	November 20, 2019
Completion date	October 13, 2020

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Effect of Fasting on the Non-invasive Measurement of the Body's Water Compartments

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms