ArticleFrontiers in cardiovascular medicine2022
Quantitative analysis of venous outflow with photo-plethysmography in patients with suspected thoracic outlet syndrome.
Article in Frontiers in cardiovascular medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04376177 (Evaluation Des Mesures Dopplers, Angiographiques, Radiographique Oximetriques, Plethysmographiques, Electromyographiques et Des Questionnaires Cliniques Des Patients adressés Pour Suspicion de Syndrome du défilé Thoraco-brachial), which is not on this map. Not yet cited in PubMed.
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Evaluation Des Mesures Dopplers, Angiographiques, Radiographique Oximetriques, Plethysmographiques, Electromyographiques et Des Questionnaires Cliniques Des Patients adressés Pour Suspicion de Syndrome du défilé Thoraco-brachial
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6 authors at 4 institutions in 1 country.
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Abstract
Background: Venous compression is the second most frequent form of thoracic outlet syndrome (TOS). Although venous photo-plethysmography (PPG) has been largely used to estimate the consequences of chronic thromboses (Paget Schroetter syndrome), systematic direct quantitative recording of hemodynamic consequences of positional venous outflow impairment in patients with suspected TOS has never been reported. Objective: We hypothesized that moving the arms forward (prayer: "Pra" position) while keeping the hands elevated after a surrender/candlestick position (Ca) would allow quantification of 100% upper limb venous emptying (PPGmax) and quantitative evaluation of the emptying observed at the end of the preceding abduction period (End-Ca-PPG), expressed in %PPGmax. Materials and methods: We measured V-PPG in 424 patients referred for suspected TOS (age 40.9 years old, 68.3% females) and retrieved the results of ultrasound investigation at the venous level. We used receiver operating characteristics curves (ROC) to determine the optimal V-PPG values to be used to predict the presence of a venous compression on ultrasound imaging. Results are reported as a median (25/75 centiles). Statistical significance was based on a two-tailed Results: An End-Ca-PPG value of 87% PPGmax at the end of the "Ca" period is the optimal point to detect an ultrasound-confirmed positional venous compression (area under ROC: 0.589 ± 0.024; Conclusion: V-PPG is not aimed at detecting the presence of a venous compression due to collateral veins potentially normalizing outflow despite subclavicular vein compression during abduction, but we believe that it could be used to strengthen the responsibility of venous compression in upper limb symptoms in TOS-suspected patients, with the possibility of non-invasive, bilateral, recordable measurements of forearm volume that become quantitative with the Ca-Pra maneuver. Clinical trial registration: [ClinicalTrials.gov], identifier [NCT04376177].
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