Pain, Postoperative Pain, Surgery
Conditions
Brief summary
In this study, the performances of Medasense's non-invasive pain monitoring is compared with standard pain related indicators, such as heart rate, galvanic skin response, etc. , and with a subjective pain level assessment. The subjective pain level is assessed by the anesthesiologist when the patient is under general anesthesia and by the patient and a nurse in post anesthetic care unit (PACU). The study is based on recording and analyzing the subject's physiological signals, while recording painful events, medication dosing and different clinical signs.
Detailed description
Pain is an unpleasant sensation, ranging from slight discomfort to intense suffering. Since pain is a subjective phenomenon, it has frequently defied objective, quantitative measurements. Today, in order to measure pain, subjective uni-dimensional scales are used to quantify pain. One of the most common scale used to rate a patient's pain intensity is the visual analog scale (VAS), usually scored from 0 to 100. Hitherto, those scales are based on the subjective evaluation of pain by the patient. During anesthesia the patient cannot communicate and therefore the verbal or other report is impossible. Therefore, due to misrepresentation of the existence or extent of pain, care providers may fail to estimate the correct measure of pain and give too much or too little medication. A scoring system of pain level is therefore needed. That is the problem Medasense's system tries to approach. In this study investigators intend to test and analyze the performances of Medasense pain monitor by comparing its results with standard pain related indicators and with subjective patient's pain level assessment. The patient's pain level will be assessed by the anesthesiologist during surgery based on known pain stimuli, medications administered and clinical signs, and by the PACU nurse and patient's reports, when the patient is in recovery.
Interventions
None listed
Sponsors
Medasense Biometrics Ltd
Study design
Observational model
COHORT
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* ASA physical status 1-2 * Elective surgery under general anesthesia * Baseline blood pressure \< (170\\100 mmHg), heart rate \< 100 bpm
Exclusion criteria
* Pregnancy or lactation * History of severe cardiac arrhythmias * Presence of any neuromuscular or neurological disease * Use of central nervous system (CNS) -active medications * Abuse of alcohol or illicit drugs * History of mental retardation or any mental disease * Any severe lung, liver, renal disease and uncontrolled diabetes mellitus * Use of a α or β-adrenergic antagonist or anticholinergics * Allergy to any of the drugs to be used during surgery * Use of regional anesthesia
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Changes in Medasense's non-invasive pain monitoring index in response to painful events. | before versus after painful stimuli (for instance: intubation, skin incision, trocar insertion) | outcome measure will be assessed one minute before painful event, and will be compared to a measure taken during the painful event. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Changes in all pain related physiological parameters (heart rate, heart rate variability, Plethysmograph amplitude, skin conductance, etc) in response to specific painful stimuli | before versus after painful stimuli (for instance: intubation, skin incision, trocar insertion) | Outcome measures will be assessed one minute before painful event, and will be compared to measures taken during the painful event. |
| Changes in anesthesiologist subjective pain assessment in response to specific painful stimuli | before versus after painful stimuli (for instance: intubation, skin incision, trocar insertion) | Outcome measure will be assessed one minute before painful event, and will be compared to a measure taken during the painful event. |
| Changes in Medasense index/pain related parameters/subjective pain assessment in response to changes in the level of analgesic drugs | before versus after analgesic drug administration | Outcome measures will be assessed one minute before administration of analgesic drug, and will be compared to measures taken one minute after. Participants will be followed for the duration of surgery and Postoperative Recovery. |
Countries
Israel
Outcome results
None listed