Intraoperative p50 Measurement in Liver Transplant Surgeries

Investigation of the Clinical Predictive Value of p50 Value in Liver Transplant Surgeries

Status

Enrolling by invitation

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT06660095

Acronym

p50

Enrollment

Registered

2024-10-26

Start date

2024-10-22

Completion date

2025-01-21

Last updated

2024-10-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Liver Transplant; Complications

Keywords

Liver transplant, anesthesia, Blood gas analysis

Brief summary

The aim of this study is to compare the p50 value in routine blood gas measurements taken during liver transplant surgery follow-up with other follow-up parameters and clinical findings on the monitors, and to investigate whether there is a predictive parameter that can predict the rapidly changing clinical findings of the patients.

Detailed description

Blood gas monitoring is the most commonly method used by anesthetists during liver transplant surgeries. We evaluated the blood gas p50 value according to the stages in these heart transplant operations. We tried to find out how the blood gas p50 value would guide the patient's clinical findings in the dissection phase, anhepatic phase and neohepatic phase. For this purpose, we compared arterial and venous blood gas p50 values with the patient's vital signs at certain stages in liver transplant surgeries.

Interventions

None listed

Study design

Observational model

CASE_ONLY

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 65 Years

Healthy volunteers

Inclusion criteria

* Liver transplant recipients who will undergo Elective Liver Transplant surgery at İnönü University Faculty of Medicine Liver Transplant Institute, ASA (American Society of Anesthesiology) score III-IV, patients between the ages of 18-65

Exclusion criteria

* Patients with fulminant liver failure, * hepatic encephalopathy, * hepatorenal, * hepatopulmonary syndrome, * uncontrolled diabetes mellitus, * cardiovascular, pulmonary disease, * sepsis * and patients who refuse consent in the informed consent form will be excluded from the study.

Design outcomes

Primary

Measure	Time frame	Description
p50 changes during liver transplant surgery	T0: at the end of the dissection before clamps T1: 5 min. before reperfusion (anhepatic) T2: 30 min. after reperfusion of the liver graft (neohepatic) T3: after hepatic artery reperfusion T4: End of the operation	P50 is the partial pressure of oxygen required to achieve 50% haemoglobin saturation. The normal p50 value is 24-28 mmHg. The oxygen-hemoglobin dissociation curve represents the affinity of hemoglobin for oxygen. The p50 value represents a mid-point in this curve, and gives us information regarding that affinity. Determining the clinical value, if any, of the changes in p50 values taken at different stages of liver transplantation surgery may be useful in the follow-up of these patients in the future and may help in making intraoperative decisions.

Countries

Turkey (Türkiye)

Outcome results