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  • Title: Postoperative monitoring of pediatric toe-to-hand transfers with differential pulse oximetry.
    Author: Jones NF, Gupta R.
    Journal: J Hand Surg Am; 2001 May; 26(3):525-9. PubMed ID: 11418919.
    Abstract:
    Twenty-three toe-to-hand transfers performed in 21 children were monitored after surgery using differential pulse oximetry for 4 to 12 days. Pulse rate recorded by the pulse oximetry monitored the patency of the arterial anastomosis, whereas oxygen saturation (SaO(2)) corresponded to the patency of the venous anastomosis; these were both compared with the systemic pulse rate and oxygen saturation recorded by a second control pulse oximeter probe attached to a contralateral finger or toe. All 23 toe transfers were ultimately successful, but 2 required re-exploration for anastomotic problems detected by the pulse oximeter. Based on this experience, the following criteria have been developed for the nursing and junior medical staff: if the arterial pulse of the toe transfer is lost completely or if the pulse rate differs significantly from the systemic pulse rate, measured by the second control pulse oximeter, thrombosis of the arterial anastomosis should be suspected. If the oxygen saturation of the toe transfer decreases below the oxygen saturation measured by the control pulse oximeter and this differential is sustained over a period of time, thrombosis of the venous anastomosis should be suspected. Differential pulse oximetry appears to be superior to temperature monitoring and percutaneous and laser Doppler monitoring and provides the most simple and continuous technique of noninvasive postoperative monitoring of toe-to-hand transfers in children requiring reconstruction of traumatic or congenital deformities.
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