Optimization of the measuring time of somatosensibel evoked corticalen potentials of the median nerve by individual determination of the number of averaging steps required for measurement by an algorithm.

Recruiting

Conditions: M51.1
Lumbar and other intervertebral disc disorders with radiculopathy

Registration Number: DRKS00013669

Lead Sponsor: Klinik für Anästhesie

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: Recruiting

Sex: All

Target Recruitment: 35

Inclusion Criteria

Patients with indication for surgery in the field of the spine in the clinic for neurosurgery under general anesthesia are to be investigated.

Exclusion Criteria

1. Rejection of study participation by the patient
2. Minors or non-consent-capable patients
3. Patients with central nervous disorders
4. Patients with missing knowledge of German

Study & Design

Study Type: observational

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
The MSEP are derived after achieving stable anesthesia with stable vital parameters with a different number (N) of averaging steps. <br>First, five output measurements are performed with 200 averaging steps (n = 200), whereby the deviation of the individual measurements may not be more than 20% of the initial value. Then n is halved and averaged twice. If the curve can be reproduced (deviation of the measurements no more than 20%), N is halved again and the measurement is repeated twice until the curve can no longer be reproduced. Then n is incremented by half the distance to the last averaging number and measured again twice until the curve is reproducible. Then another three measurements are made to ensure that a deviation of less than 20% occurs even with the reduced number of N of averaging steps. If this is not the case, the averaging number is increased again to half of the distance to the last averaging and the five measurements are repeated.<br>

Secondary Outcome Measures