Evaluation of performance characteristics of the medicinal leech (Hirudo medicinalis) for the treatment of venous congestion
Experimental study published in Plast Reconstr Surg (2002)
Abstract
Medicinal leeches (Hirudo medicinalis) are a standard treatment for venous congestion, a complication that can occur after reconstructive surgery. If the cause of venous congestion cannot be surgically corrected, then medicinal leeches are used to temporarily increase perfusion levels and maintain physiologic requirements within the congested tissue. Leeches increase perfusion within congested tissue by actively drawing off blood as a bloodmeal. Furthermore, the leech bite continues to bleed and relieve congestion after detachment because of the anticoagulation effects of leech saliva left behind in the bite. In a porcine model, a 10 x 10 cm cutaneous flank flap was congested by clamping the venae comitantes. Four medicinal leeches were allowed to attach to the congested flap, and parameters of active feeding and passive bleeding after detachment were recorded. The average bloodmeal volume for the medicinal leeches was 2.45 ml. Average passive bleeding for the first 2 and 4 hours after leech detachment totaled 2.21 and 2.50 ml, respectively, with 90 percent of passive bleeding occurring within 5 hours after detachment. Laser Doppler imaging indicated that the spatial arrangement of surface perfusion increases were localized to a 1.6-cm-diameter circle around the leech head (bite) and corresponded well with the visual return of normal skin tones to the same area. This study provides a realistic and quantitative estimate of the spatial and volumetric characteristics of leech feeding and passive bleeding using a clinically relevant model of acute, severe congestion.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Resumen
Porcine model showed leech bloodmeal averaged 2.45 mL, passive bleeding 2.50 mL over 4 hours, with surface perfusion increases localized to 1.6-cm circle around bite (90% bleeding within 5 hours of detachment).
Por qué esto importa para la hirudoterapia
Este estudio cuantificó las características de rendimiento de las sanguijuelas medicinales (Hirudo medicinalis) en un modelo porcino de congestión venosa aguda, creada mediante el pinzamiento de las venae comitantes de un colgajo cutáneo de flanco de 10×10 cm. Cuatro sanguijuelas alcanzaron un volumen promedio de ingesta sanguínea de 2,45 ml, con un sangrado pasivo promedio de 2,50 ml durante las 4 horas posteriores al desprendimiento; el 90 % del sangrado pasivo ocurrió dentro de las 5 horas. La imagen por Doppler láser mostró aumentos de perfusión localizados en un círculo de 1,6 cm de diámetro alrededor de la mordedura. Este estudio es directamente relevante para la ASH, ya que aporta parámetros volumétricos y espaciales clínicamente útiles de la eliminación de sangre mediada por sanguijuelas. La limitación es que se trata de un modelo animal con un número pequeño de sanguijuelas evaluadas.
Citación
Evaluation of performance characteristics of the medicinal leech (Hirudo medicinalis) for the treatment of venous congestion.
Conforti ML et al. · Plastic and reconstructive surgery, 2002
Contexto clínico relacionado
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Añadido a la biblioteca ASH: May 27, 2026 · Última actualización del sitio: 18 de junio de 2026