| ORIGINAL CONTRIBUTION
|Year : 1986 | Volume
| Issue : 6 | Page : 332--336
Indigenous Patch Iest Unit Resembling Finn Chamber
Surrinder Kaur, Vinod K Sharma
Indigenous patch test unit made front aluminum discs obtained' from the tops of discarded injection vials and adhesive plaster was found suitable after testing:8430 chambers in 471 patients. This patch test unit is cheap and can be easily prepared in a side laboratory. The discs can be resued after washing and drying and disc material has no cross-reactivity with nickel. The large number of -antigens (up to 40) can be tested on the upper back in one sitting The tight occlusion prevents the spread of the reaction beyond the patch test site. Micio-cuts 1-2 in number without subjective discomfort, were produced in iipt6 5% of the chambers and these healed without medication in' 2-3 days. There was no, spill-over of petrolatum based antigens, However, with, aqueous antigens the spill over occurred in up to 2% chambers. The above limitations can be minimized by close scrutiny of the chambers for sharp edges before use and by applying measured quantity of the aqueous antigen.
Source of Support: None, Conflict of Interest: None