An observational study in Regional Anesthesia Success and Orthopedic Surgery, sponsored by Hospital Central "Dr. Ignacio Morones Prieto". Completed at 1 site in Mexico. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-04-08.
Sponsored by Hospital Central "Dr. Ignacio Morones Prieto" · Observational
The goal of this observational study is to define the usefulness of a new device to predict the supraclavicular block successfulness in the patients scheduled to orthopedic surgery. The main question it aims to answer is:
¿The combination between a flexometer and perfusion index is capable to predict the successfulness of a supraclavicular block in the first 15 min?
Participants will be anesthetized by residents or anesthesiologist with regional anesthesia training and then connected to a flexometer to measure the motor blockade and a pulse oximeter to measure the perfusion index related to sympathetic blockage at 0, 5, 10 and 15 min .
Prospective observational pilot study conducted at "Dr. Ignacio Morones Prieto" Central Hospital, Mexico, involving 33 patients (ASA 1, 2, 3) requiring surgery on the distal third of the upper limb with ultrasound-guided SCPB. The motor block was assessed with a conductive ink flexion sensor, and the sympathetic block was evaluated with perfusion index via pulse oximeter at 3, 5, 10, and 15 minutes. Block success was defined as a Numerical Rating Scale (NRS) for pain \<2 during surgical stimulation. Statistical comparisons were made between successful and unsuccessful blocks, with ROC curve analysis identifying optimal cutoff points for predictive variables.
Hospital Central "Dr. Ignacio Morones Prieto" is the lead sponsor of 11 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
patients scheduled to orthopedic surgery of the upper limb in the Hospital General "Dr. Ignacio Morones Prieto" in San Luis Potosi, Mexico.
Exclusion Criteria:
measurements of the motor strength and perfusion index in the blocked hand to predict the successfulness of the supraclavicular block at 0, 5, 10 and 15 min post blockage.
measurement of motor strength with the flexometer in the blocked hand at 0, 5, 10, 15 minutes post blockage
the patient will be asked to move the third finger of the blocked hand which will be connected to the flexometer to measure the motor strength at 0, 5, 10 and 15 minutes and correlate with the successfulness of the block.
Time frame: Periprocedural
measurement of sympathetic block with perfusion index in the blocked hand
measurement of the perfusion index in the blocked hand at 0, 5, 10 and 15 minutes post blockage and correlate with the sympathetic block and successfulness of the supraclavicular block.
Time frame: Periprocedural
success of supraclavicular block
measure the success of the block defined as Numeric Scale Rate (NRS from 0 to 10) less 2 and absence to change the anesthetic technique during the surgery. Less NRS is correlated with successfulness of the blockage.
Time frame: Periprocedural
Plan to share: Undecided — at the moment, the patients data are confidential, so, we haven't decide to share with other investigators. only data used in the results will be available.
This study is completed, as verified in Apr 2025. You cannot join it, but the record below documents what was studied.
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Hospital Central "Dr. Ignacio Morones Prieto"