| Inclusive criteria | Exclusive criteria |
| Patients >15 yrs of age | --- |
| Both sexes | -- |
| All surgeries where preparation needed | Neck, face and thyroid |
| ----- | Emergency surgeries |
| No local skin lesions | Skin lesion/infection |
| Skin test for reaction |
| Inclusive criteria | Exclusive criteria |
| Patients >15 yrs of age | --- |
| Both sexes | -- |
| All surgeries where preparation needed | Neck, face and thyroid |
| ----- | Emergency surgeries |
| No local skin lesions | Skin lesion/infection |
| Skin test for reaction |