Innovative probe of micropipette for glass vial for chemical cautery

PROBLEM

Chemical cautery is a common procedure for treating superficial benign skin lesions. However, it may cause injury to the adjacent skin. A variety of advancements have been introduced to make disposable syringes safe for chemical cautery in clinics. Moreover, the micropipette and its device have been used, but are little expensive.^[1] Chemicals cannot be kept in syringes for an extended period of time due to their corrosive effects on the syringe’s plastic and rubber components.^[2] The glass container is chemically resistant in which refill pen polytube has been used, which has no pointed tip.^[3] To reduce tissue harm during chemical cautery, the probe of the chemical vial has been redesigned for focused cauterization.

SOLUTION

To adapt the glass vial probe for chemical cautery, a micropipette tip was employed. First of all, the vial was rinsed with water with the help of a syringe and its needle for two to three times. Then the proximal wide end of the micropipette has been cut obliquely with a blade so that its cut end is pointed and penetrative enough to fit inside the vial. After that, the pipette tip was filled with cotton twigs to improve capillary action [Figure 1a]. Following that, the cap of the vial was penetrated with the pointed arms of small scissors, and then the cotton-filled probe was placed into the rubber cap of the chemically filled glass vial [Figure 1b]. The device is now ready for chemical cautery, and the probe can be capped with a disposable needle cap after cautery. It can be kept upright. Before cautery, place the device in the reverse upright position or horizontal position for 5 – 10 min to soak the probe’s cotton for better capillary action.

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Figure 1:

(a) The modified micropipette probe for chemical glass vial. (b) The glass vial stuffed with micropipette probe.

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The advantage of this device is that it is a chemically resistant container with no need for manual pressure, as it mainly works on capillary action.