None listed
Conditions
Brief summary
Photoplethysmographic signal reflects sympathetic activity under the level of epidural block. The height of sensory block during epidural anaesthesia reflects the height of sympathetic block. Area under the photoplethysmographic curve (AUC) depends on variability of the photoplethysmographic signal strenght and duration. Our hypothesis is that change in any parameter, due to the sympathetic block, will change the area under the curve of the photoplethysmographic signal. 40 patients with epidural anaesthesia will be included in the research. 0.5% bupivacaine will be injected in the L3/L4 level and Biopac SS4LA Pulse Plethysmograph Transducer will be used for photoplethysmography recording. Amplitude (maximum PPG sygnal), pulse transit time and area under the curve will be recorded. Our goal is to test sympathetic activity using variabilities, shapes and characteristics of the PPG curve (area under the curve) during 0.5% bupivacaine epidural anaesthesia.
Interventions
Only one group of patients was included in the study. 0.5% bupivacaine was injected in the L3/L4 level by the qualified anaesthesiologist and Biopac SS4LA Pulse Plethysmograph. Photoplethysmography recordings were taken before lumbar epidural anaesthesia procedure was done, as well as during the whole surgical procedure and during the post-anaesthesia recovery (until all of the sensoric functions of the lower limbs were recovered). Transducer was used for photoplethysmography recording. Amplitud
Only one group of patients was included in the study. 0.5% bupivacaine was injected in the L3/L4 level by the qualified anaesthesiologist and Biopac SS4LA Pulse Plethysmograph. Photoplethysmography recordings were taken before lumbar epidural anaesthesia procedure was done, as well as during the whole surgical procedure and during the post-anaesthesia recovery (until all of the sensoric functions of the lower limbs were recovered). Transducer was used for photoplethysmography recording. Amplitude (maximum PPG sygnal), pulse transit time and area under the curve were recorded.
Sponsors
Clinical Hospital Center Zagreb
Study design
Allocation
Non-randomised trial
Primary purpose
Diagnosis
Eligibility
Sex/Gender
All
Age
18 Years to 45 Years
Healthy volunteers
No
Inclusion criteria
40 patients aged 18-45 which underwent surgical procedure under epidural anaesthesia.
Exclusion criteria
pulses of the arteria tibialis posterior and arteria dorsalis pedis are not palpable perspiration of the feet is not maintained abnormal growth and transparency of the nails changes which indicate pathological alteration of the blood vessels of the lower extremities
Outcome results
None listed