Some Effects of a Topical Collagen-Based Matrix on the Microcirculation and Wound Healing in Patients With Chronic Venous Leg Ulcers: Preliminary Observations

Abstract

Themicrocirculation of the wound bed is a key parameter for improving granulation tissue formation and, hence, wound healing. The aim of this study was to determine whether a wound dressing comprising collagen/oxidized regenerated cellulose has effects over a short term on wound healing. Wounds were evaluated using a clinical wound score; pain associated with wounds was measured using a visual analogue scale. Wound microcirculation was evaluated using a technique based on noncontact remission spectroscopy. A prospective trial was performed in 40 patients with chronic venous leg ulcers (mean age 74 years; range, 43-93 years; 25 females and 15 males). Patients in group A were treated with PROMOGRAN® Matrix (Johnson& Johnson, New Brunswick, NJ) combined with “good” ulcer care for 2 weeks. Control group B consisted of 10 patientswho received only good ulcer care. The authors measured a favorable clinical response in 76.9% (group A) versus 66.7% (group B). Themean reduction of ulcer area was statistically significant in group A (P < .05). The wound score improved in group A from 2.28 ± 1.24 (before treatment) increasing to 3.72 ± 1.57 (after 1 week; P < .00023) and 4.92 ± 1.68 (after 2 weeks; P < .000027). In group B, the score improved from 1.44 ± 1.33 (before treatment) to 3.22 ± 1.30 (after 1 week; P < .0077). The mean visual analogue pain score before treatment was 8.72 (group A) and 7.88 (group B) (ns,P > .05). After 1 week of treatment, the score dropped to 5.76 (group A) and 6.66 (group B). In the second week, group A patients had a mean pain score of 3.84 compared with the pain score before treatment (P < .05). After 1 week of treatment, in group A there was a decrease in remission spectroscopy, which is considered to reflect an improvement in microcirculation.

Keywords

venous ulcers wound score microcirculation remission spectroscopy collagen-based matrix pain

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