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Pre- and postoperative evaluation by photoplethysmography in patients receiving surgery for lower-limb varicose veins
Orlando Adas Saliba Júnior1, Mariangela Giannini1, Ana Paula Mórbio2
1Faculty of Medicine of Botucatu, Universidade Estadual Paulista (UNESP), Avenida Prof. Montenegro, Distrito de Rubião Junior, s/n, 18618970 Botucatu, SP, Brazil.
Abstract:
Objective. To evaluate the effectiveness of surgery in treating primary varicose veins in the lower limbs by photoplethysmography (PPG) and duplex mapping (DM). Method. Forty-eight lower limbs were clinically evaluated according to the CEAP classification system and subjected to PPG and DM exams. Each limb had a venous refill time (VRT) of <20 seconds and a normal deep vein system (DVS) by DM. Results. The mean pre- and postoperative VRTs were 13.79 and 26.43 seconds, respectively (P < 0.0001). After surgery, 42 limbs (87.50%) had normal results by PPG (VRT > 20 seconds). Four limbs (8.33%) showed improved VRTs, but the VRTs did not reach 20 seconds. In the 2 limbs (4.17%) that maintained their original VRTs, the DM exams showed the presence of insufficient perforating veins. Conclusion. In most cases, PPG allows for a satisfactory evaluation of the outcome of varicose vein surgery.
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