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Clinical Trial Summary

This study aims to assess the safety and efficacy of ulnar artery cannulation compared to radial artery cannulation in pediatrics undergoing major non cardiac procedures.


Clinical Trial Description

The study is a double blinded randomized controlled trial that will be conducted at Abu Al Reesh Children's Hospital, Faculty of Medicine, Cairo University after approval of research and ethics committees. Children will be recruited into the trial during pre-operative assessment. will be randomly assigned to one of two groups Recruited patients will be randomly allocated by a computer-generated sequence of codes using randomization software (https://www. randomizer.org) into one of the two groups; in a 1:1 ratio (Group R) to receive radial artery cannulation and (Group U) to receive ulnar artery cannulation using ultrasound. The randomization sequence will be concealed in sequentially numbered, sealed opaque envelopes. The sealed envelopes will be opened by an anesthesia nurse immediately before induction of anesthesia. After induction of anesthesia, modified Allen's test will be done by the ultrasound operator as following: An Esmarch bandage will be used to exsanguinate the selected hand for cannulation according to the operator preference for 30 seconds, then the operator will apply simultaneous pressure to the ulnar and radial arteries of the chosen limb to occlude them. The bandage will then be released. Next, the pressure over the opposed artery selected for cannulation will be released and the time (in seconds) it takes for color to return to the hand will be measured. Allen test results will be interpreted as follows: If color returns to the hand within 5 seconds, the result of the Allen test is negative (normal) and the artery can safely be cannulated. If color does not return to the palm within 5 seconds, the test result is positive (abnormal). The test will be repeated on the other hand and if the test is positive another site will be selected for cannulation, and the patient will be excluded from the study. The patient's wrist will be extended over a roll to keep the angle of the wrist unchanged to 30- 45 degrees. After hand washing and sterile gloving; skin will be prepared using alcohol-based chlorhexidine antiseptic in both groups. Assessment of proposed artery for cannulation using ultrasonography will be performed by one of 2 pediatric anesthesiologists blinded to group allocation who have performed more than 50 ultrasound guided arterial cannulation in pediatrics. Ultrasound examination will be performed using a hockey stick, high frequency (5-10 MHz) ultrasound probe (S-NerveTM; SonoSite Inc., Bothell, WA, USA). Image depth will be set to 2- 3 cm and gain settings adjusted to enhance views. Both external force and the angle will be manipulated to optimize images. The radial artery will be identified in the transverse plane and confirmed with color flow doppler, then in the longitudinal plane by rotating the probe 90 degrees clockwise while maintaining the arterial image. This method will be repeated for the ulnar artery. All antro-posterior (AP) and transverse (T) diameters will be made at the inner (intimal) edge of the vessel. AP diameter will be measured on both transverse and longitudinal images. Cross-sectional area (CSA) will be calculated then as following: π [AP × T] /4. Three measurements will be collected, and the average values will be used for analysis. Arterial cannulation will be performed using the long axis view (in-plane) technique with a 24 or 22-gauge canulae (Euromed For Medical Industries, S.A.E., Cairo, Egypt) according to the operator preference. Cannulation will be considered complete when the arterial waveform is confirmed on the monitor. If cannulation is unsuccessful within the third attempt or within 10 min, the case will be considered a failure at the chosen artery. After the failure, an alternative site will be used for cannulation and the case will be excluded from the study. The overall procedure time of arterial cannulation is defined as the time interval from the first skin puncture by the canula to confirmation of the arterial waveform on the monitor. After the procedure, the diameter of the cannulated artery and the occurrence of hematoma or vasospasm will be evaluated with ultrasound. Data will be collected by another anesthesiologist who is blinded to the group allocation. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05771935
Study type Interventional
Source Kasr El Aini Hospital
Contact
Status Completed
Phase N/A
Start date March 5, 2023
Completion date October 1, 2023

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