E14.5
Conditions
Interventions
Group 1: Diabetic patients scheduled for foot surgery or minor amputation for diabetic gangrene
Group 2: nondiabetic patients scheduled for orthopedic surgery of the foot or lower leg
Sponsors
Herz-Zentrum Bad Krozingen
Eligibility
Sex/Gender
All
Age
50 Years to No maximum
Inclusion criteria
Inclusion criteria: Diabetic patients - Diabetes mellitus - patients scheduled for foot surgery or minor amputation for diabetic gangrene - aged over 50 years - written informed consent control group - patients scheduled for orthopedic foot- or lower leg surgery - aged over 50 years - written informed consent
Exclusion criteria
Exclusion criteria: diabetic patients - contraindications to ischiadic nerve block - central nervous system disease, peripheral nerve disease or neuromuscular disease except for diabetic neuropathy - missing written informed consent control group - contraindications to ischiadic nerve block - central nervous system disease, peripheral nerve disease, neuromuscular disease - Diabetes mellitus - end stage renal disease - missing written informed consent
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Threshold of the stimulating current at needle-to-epineurium contact during performance of ultrasound-guided sciatic nerve block. The threshold is defined a minimal current which is required to elicit a motor response at a pulse width of 0.1 ms and a stimulation frequency of 1 Hz. | — |
Secondary
| Measure | Time frame |
|---|---|
| Maximum distance between needle tip and sciatic nerve for eliciting a motor response at a pulse width of 0.1 ms, a stimulation frequenvy of 1 Hz, and a current of 1 mA and 0.5 mA, respectively, during ulrasound-guided block of the sciatic nerve. | — |
Countries
Germany
Contacts
Public ContactCornelius Keyl
Universitäts-Herzzentrum Freiburg-Bad Krozingen
Outcome results
None listed