Comparison of bilateral pulse arrival time before and after induced vasodilation by axillary block
| Autor: | Sjoerd P. Niehof, Eilish M. Galvin, Frank J P M Huygen, Marit H. N. van Velzen, Robert Jan Stolker, Minke C. Kortekaas |
|---|---|
| Přispěvatelé: | Anesthesiology |
| Rok vydání: | 2012 |
| Předmět: |
Adult
Male Propagation time medicine.medical_specialty Time Factors animal structures Pulse Wave Analysis Adolescent Physiology medicine.medical_treatment animal diseases Biomedical Engineering Biophysics Vasodilation Young Adult fluids and secretions Physiology (medical) Internal medicine medicine Pulse wave Humans Aged Pulse (signal processing) business.industry Nerve Block Middle Aged medicine.disease body regions Amplitude Anesthesia Nerve block Arterial stiffness Cardiology Arm cardiovascular system Female business |
| Zdroj: | Physiological Measurement, 33(12), 1993-2002. IOP Publishing Ltd. |
| ISSN: | 0967-3334 |
| Popis: | The propagation time of arterial pulse waves provides information about arterial stiffness. Pulse arrival time (PAT) is calculated as the time between the R-wave (ECG) and three reference points on photoplethysmographic (PPG) pulse waves: foot, first derivative and peak. Because large variation in PAT-values between patients exists, measurements of the contra-lateral arm as reference could be a solution. However, anatomical differences between arteries of the arms could introduce an offset of PAT. Furthermore, when arterial stiffness decreases (e.g. after axillary blockade (AxB)) and pulse wave amplitude increases (vasodilation), the pulse waveform can change. The aim of this study was to investigate whether there is a difference between the PAT of both arms and to evaluate the effect of vasodilation after AxB on PAT. ECG and PPG was measured on both hands in 34 patients, starting 2 min before the injection of local anaesthetic of an AxB and continuing for a period of 30 min after block placement. PAT of the baseline and after AxB were calculated and compared. The mean-PAT of both arms were not significantly different for the three reference points. After AxB, PAT significantly increased for all reference points. PAT can be used for intra-subject comparison. |
| Databáze: | OpenAIRE |
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