Extrait

Background and study aims Cannulation is a commonly used medical procedure where a small tube is inserted into a vein or artery for access. Radial artery (the main artery in the forwarm) cannulation is used routinely in clinical settings for many purposes, such as accurate monitoring of beat-to-beat blood pressure, repeated multiple blood sampling and some surgical procedures. The radial artery is small, and so can be very difficult to cannulate however. Multiple attempts to cannulate can be risky and lead to risk and complications such as temporarily blocking the artery (occlusion), blood clots and bleeding. It is therefore important to find an easy, convenient and quick method for accessing the radial artery. In recent years, ultrasound (US) devices have been used to visualise blood vessels in order to access them with a cannula. Additionally use of a tourniquet (tight band to cut of blood supply) can also help improve cannulation success rates. The aim of this study is to find our whether using a tourniquet can improve the success rate of radial artery cannulation when using ultrasound. Who can participate? Adults undergoing major non-emergency surgery who require continuous beat-to-beat blood pressure monitoring throughout their operation. What does the study involve? Participants are randomly allocated to one of two groups. Those in the first group have a tourniquet tied as tightly as possible around the arm. Those in the second group have a tourniquet loosely tied on the far-end of the wrist. Following this, participants in both groups are cannulated using an ultrasound probe to visualise the artery. The time taken to successfully place the cannula is recorded for participants in both groups. What are the possible benefits and risks of participating? Participants could benefit from improved success rates of cannulation and a shorter cannulation time. There are no notable risks of participating other than the general risks associated with cannulation, such as pain or bruising. Where is the study run from? Shanghai Jiaotong University Affiliated Shanghai No.6 People’s Hospital (China) When is the study starting and how long is it expected to run for? March 2014 to December 2016 Who is funding the study? Investigator initiated and funded (China) Who is the main contact? Ms Quanhong Zhou

Critère d'inclusion

• Radial Artery Cannulation

Liens

• isrctn