Evaluation of the Influence of Short Tourniquet Ischemia on Tissue Oxygen Saturation and Skin Temperature Using Two Portable Imaging Modalities

Müller‐Seubert, Wibke; Herold, Helen; Graf, Stephanie; Ludolph, Ingo; Horch, Raymund E.

doi:10.3390/jcm11175240

Cited by 7 publications

(2 citation statements)

References 46 publications

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“…Moreover, a study conducted by Müller shows an increase in hand skin temperature under the same ischemic conditions. 37 They hypothesized that limiting metabolic heat to the thermal core compartment raises the body's core temperature, and that the ensuing vasodilation results in higher skin surface temperature measured at the fingertip.…”

Section: Discussionmentioning

confidence: 99%

Infrared thermography for normal endothelial function screening

Morales-Montalvo,

Cruz-Domínguez,

Martínez-Godínez

et al. 2024

GMM

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Background: Endothelial dysfunction (ED) suspicion will allow to prevent accelerated atherosclerosis and premature death.Objective: To establish the usefulness of thermography for endothelial function screening in adults with cardiovascular risk factors. Material and methods: Cross-sectional, analytical diagnostic test. A brachial arterial diameter (BAD) increase < 11% at one-minute post-ischemia meant probable ED and was confirmed if BAD was ≥ 11% post-sublingual nitroglycerin. Thermographic photographs of the palmar region were obtained at one minute. Descriptive statistics, ROC curve, Mann-Whitney's U-test, chisquare test, or Fisher's exact test were used. Results: Thirty-eight subjects with a median age of 50 years, and with 624 thermographic measurements were included. Nine had ED (flow-mediated vasodilation [FMV]: 2.5%). The best cutoff point for normal endothelial function in subjects with cardiovascular risk factors was ≥ 36 °C at one minute of ischemia, with 85% sensitivity, 70% specificity, positive and negative predictive values of 78 and 77%, area under the curve of 0.796, LR+ 2.82, LR-0.22. Conclusion: An infrared thermography-measured temperature in the palmar region greater than or equal to 36 °C after one minute of ischemia is practical, non-invasive, and inexpensive for normal endothelial function screening in adults with cardiovascular risk factors.

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Section: Discussionmentioning

confidence: 99%

Infrared thermography for normal endothelial function screening

Morales-Montalvo,

Cruz-Domínguez,

Martínez-Godínez

et al. 2024

GMM

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“…Además, el estudio de Müller muestra un aumento de la temperatura de la piel de las manos ante la misma condición de isquemia. 37 Se planteó la hipótesis de que limitar el calor metabólico al compartimento térmico central eleva la temperatura central del cuerpo, y que la vasodilatación resultante deriva en una mayor temperatura de la superficie de la piel medida en la punta del dedo.…”

Section: B C Aunclassified

Termografía infrarroja en la detección de la función endotelial normal

Morales-Montalvo,

Cruz-Domínguez,

Martínez-Godínez

et al. 2024

GMM

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con factores de riesgo cardiovascular. Material y métodos: Estudio transversal analítico de prueba diagnóstica. El incremento del diámetro de la arteria braquial < 11 % a un minuto posisquemia significó probable DE, confirmada si el diámetro fue ≥ 11 % posnitroglicerina sublingual. Se obtuvieron fotografías termográficas al minuto de la región palmar. Se aplicó estadística descriptiva, curva ROC, pruebas U de Mann-Whitney, chi cuadrada o exacta de Fisher. Resultados: Se incluyeron 38 sujetos, mediana de edad de 50 años, con 624 mediciones termográficas; nueve presentaron DE (vasodilatación mediada por flujo de 2.5 %). El mejor punto de corte para la función endotelial normal en sujetos con factores de riesgo cardiovascular fue ≥ 36 °C al minuto de isquemia, con sensibilidad de 85%, especificidad de 70%, valores predictivos positivo y negativo de 78 y 77%, área bajo la curva de 0.796, razón de verisimilitud positiva de 2.82 y razón de verisimilitud negativa de 0.22. Conclusión: La medición de la temperatura en la región palmar mediante termografía infrarroja ≥ 36 °C tras un minuto de isquemia es práctica, no invasiva y económica para el cribado de la función endotelial normal en adultos con factores de riesgo cardiovascular.

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Prospective analysis of grip strength and load distribution after surgical treatment of common diseases of the hand with novel’s manugraphy® system

Grüner

Cai

Pingel

et al. 2023

Arch Orthop Trauma Surg

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Background Carpal tunnel syndrome, A1 annular pulley stenosis and Dupuytren’s contracture are among the most common conditions of the hand. In this study, we investigated the impact of surgical procedure on hand grip strength and high-resolution spatial load distribution in individuals suffering from those diseases over a follow-up period of one year. Materials and methods In this prospective study, data of 9 patients with carpal tunnel syndrome, 12 patients with A1 annular pulley stenosis and 7 patients with Dupuytren’s contracture were evaluated. Only patients with unilateral disease were included providing the contralateral hand as an intra-individual control. Grip strength was measured with cylindrical instruments in two different sizes with respect to the hand size of the patients. Maximum and average values of grip strength as well as spatial load distribution in each finger, thenar, hypothenar and palm were analyzed. Data of the affected patients were collected preoperatively and 6 weeks, 6 months and 1 year postoperatively. Grip strength and spatial load distribution were compared preoperatively to postoperatively. In addition, DASH score, Levine score, 2-point discrimination and degree of flexion contracture were assessed. Results The patients with A1 annular pulley stenosis showed a significant increase in grip strength 6 months and one year postoperatively. Patients with carpal tunnel syndrome and Dupuytren’s contracture showed no significant difference in grip strength over the course of time. An increase in the percentual grip strength of the thenar in patients with carpal tunnel disease and within the affected finger in A1 annular pulley stenosis was observed over the course of time. The DASH score was significantly lower in all patient cohorts one year postoperatively. Conclusion Surgical procedure in carpal tunnel syndrome, A1 annular ligament stenosis and Dupuytren’s contracture improves the functionality of the hand in everyday life. Some areas of the hand seem to compensate other weaker areas in grip strength.

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Evaluation of the Influence of Short Tourniquet Ischemia on Tissue Oxygen Saturation and Skin Temperature Using Two Portable Imaging Modalities

Cited by 7 publications

References 46 publications

Infrared thermography for normal endothelial function screening

Infrared thermography for normal endothelial function screening

Termografía infrarroja en la detección de la función endotelial normal

Prospective analysis of grip strength and load distribution after surgical treatment of common diseases of the hand with novel’s manugraphy® system

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