The Effect of Remote Ischemic Preconditioning in Patients Undergoing Major Liver Surgery
NCT ID: NCT00796588
Last Updated: 2008-11-24
Study Results
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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UNKNOWN
NA
48 participants
INTERVENTIONAL
2005-04-30
2012-12-31
Brief Summary
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Detailed Description
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Blood Measurements: Blood will be collected at seven different time points, Baseline, Post IPC, 15 and 90 minutes post IRI and then 6,12 and 24 hours post IRI. At each time point approximately 35 ml of blood will be collected. Samples will be collected for the following measurements: Serum LFT and electrolytes, Serum CPK isozymes, Plasma cytokines, coagulation profile, TEG profile, Plasma cytokines, xanthine and XO/XDH activities, Plasma neutrophil activation, Total plasma Nitrate levels, Plasma lactate and ammonia levels and pulmonary artery blood (from indwelling Swan Ganz) for Plasma Myeloperoxidase levels. Some of these are routine measurements done during and after liver surgery.
Biopsies: Two Liver trucut biopsies - one prior to implantation (and in case of liver resection from the normal remnant liver before occlusion) and the other immediately prior to closure of the abdomen - will be taken to study the changes in tissue oxidation, tissue adhesion molecule upregulation and morphology prior to and after preconditioning.
Intra-operative haemodynamcis: Cardio-pulmonary haemodynamics will be monitored using a Swan-Ganz catheter (if it is clinically indicated and already in place) to note the effects of skeletal muscle ischemic preconditioning on the liver, lungs and the heart. In those patients undergoing liver resection invasive heaemodynamic monitoring will not be performed for the purpose of the study, if not required clinically by the anaesthetists and intensive care physicians. Non-invasive measurements will be made of hepatic and cutaneous circulation using surface Laser Doppler flow meter and Ultra sound probes. Cutaneous microvascular responses to iontophoresis (non-invasive) of acetylcholine, an endothelium-independent vasodilator and sodium nitroprusside, and endothelium-independent vasodilator will be measured using the laser Doppler flow meter. NIRS probes (non -invasive) will be used on the surface of the to measure liver tissue oxygenation. All probes will be properly sterilised prior to application.
Post-operative heamodynamics: Cardio-pulmonary haemodynamics will continue to be monitored using a Swan-Ganz catheter (routinely inserted during liver transplantation) in the post-operative period for 24 hours.
ICG measurements: To assess liver function by injecting 0.5 mg/kg of indocyanine green (ICG) pre-operatively, intra-operatively and post operatively. ICG is routinely used in many liver centres for the assessment of liver function in clinical practise. No additional blood samples will be collected since the uptake and excretion of ICG by the liver will be measured by a non invasive digital pulse densitometric device (ICG Pulsion) connected to the patient by a finger sensor.
Conditions
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Keywords
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Study Design
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RANDOMIZED
CROSSOVER
HEALTH_SERVICES_RESEARCH
SINGLE
Study Groups
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Control group
Patients undergoing liver surgery without the designated intervention
remote preconditioning
Three periods of 10 minute occlusion of blood supply to leg using a pneumatic tourniquet
RIPC
application of pneumatic tourniquet in patients undergoing liver surgery
remote preconditioning
Three periods of 10 minute occlusion of blood supply to leg using a pneumatic tourniquet
Interventions
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remote preconditioning
Three periods of 10 minute occlusion of blood supply to leg using a pneumatic tourniquet
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
* Patients with symptomatic peripheral vascular disease and absent or weak peripheral pulses.
* Patients with varicose veins and venous ulcers
* Patients with blood disorders, eg. sickle cell disease
* Patients with any localised limb infections eg. cellulitis
* Pregnancy
* HIV infection
* Fulminant sepsis
* Severe comorbid disease
* Patients below the age of 18
18 Years
90 Years
ALL
No
Sponsors
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Royal Free Hampstead NHS Trust
OTHER
Responsible Party
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Royal Free Hospital and Medical School
Principal Investigators
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Brian R Davidson, FRCS, MD
Role: PRINCIPAL_INVESTIGATOR
Royal Free Hospital and medical School
Locations
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Royal Free Hospital
London, , United Kingdom
Countries
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References
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Hausenloy DJ, Yellon DM. Remote ischaemic preconditioning: underlying mechanisms and clinical application. Cardiovasc Res. 2008 Aug 1;79(3):377-86. doi: 10.1093/cvr/cvn114. Epub 2008 May 2.
Robertson FP, Goswami R, Wright GP, Fuller B, Davidson BR. Protocol for a prospective randomized controlled trial of recipient remote ischaemic preconditioning in orthotopic liver transplantation (RIPCOLT trial). Transplant Res. 2016 Apr 6;5:4. doi: 10.1186/s13737-016-0033-4. eCollection 2016.
Other Identifiers
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RFH:6100
Identifier Type: -
Identifier Source: org_study_id