Table 2.
Research-Related Imaging Studies and Added Procedures Requiring Anesthesia
| Imaging Study and Added Procedures |
First Anesthetic Procedure for Each Patient |
All Anesthetic Procedures for All Patients |
|---|---|---|
| Primary imaging study | ||
| Magnetic resonance imaging | 568 | 1403 |
| Computed tomography | 33 | 58 |
| Positron emission tomography | 5 | 16 |
| Radiographs | 1 | 1 |
| Nuclear imaging study | 0 | 2 |
| Added procedures | ||
| Other imaging studies | 30 | 65 |
| Physical examination during anesthesiaa | 50 | 105 |
| Skin biopsies | 35 | 47 |
| Lumbar puncture | 116 | 187 |
| Radiation therapy | 3 | 3 |
| Electroretinogram | 11 | 23 |
| Percutaneous intravenous line | 6 | 13 |
| Otherb | 3 | 8 |
a
Examination of sensitive areas under anesthesia is not possible while patient is awake.
b
Other included bone marrow biopsy, lung biopsy, knee steroid injection, removal of catheter, and placement of electroencephalogram leads.