Kshar sutra evaluated clinically in the department of Shalya Tantra, Institute of Medical Science, BHU Varanasi
| S.no | Types of kshar sutra | Year of trial | Merits | Demerits |
| 1 | Snuhi Kshar sutra (21 coating) | 1968 | Good cutting of track and healing of wounds
Low recurrence |
Difficulty in perennial collection and storage of snuhi latex
Highly hygroscopic in nature and coating peeled of easily During application, breaks into multiple pieces forming beaded appearance and while applying in the fistulaus track, it causes undue mechanical trauma and pain Moderate to severe pain and burning sensation while changing |
| 2 | Udumbar sutra
(11 coating) |
1984 | Easy to prepare
Minimal scarring Good healing of wounds Low recurrence rate Significantly less pain and burning sensation |
les s cutting rates compared to snuhi/latex ksharsutra |
| 3 | Papaya kshar sutra
(13 coating, prepared from raw papaya juice / papain powder ) |
1984 | Easy availability and storage of raw material
Less pain or burning sensation in patients Proteolytic property of papain leads to faster cutting of track Suitable for recurrent fistulae with fibrosis |
Rate of cutting is faster than healing, leads to longer duration of treatment |
| 4 | Snuhi swarasa kshar sutra
(2 coating ) |
1984 | Comparatively less pain during changing of thread | Coating peeled of easily
Less shelf life |
| 5 | Yava kshar sutra | 1990 | Significantly less pain and burning
Faster cutting compared to standard snuhi latex kshar sutra |
Non uniform (beaded) thread with stiff consistency
Mechanical trauma during application
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