Performance of the Locally Made Disposable 10-gram Semmes-Weinstein Monofilament Compared to the Commercially Available Monofilament

Danu Prommin, Pasu Sirisalee, Parinya Junhunee, Bongkoch Praewpipat, Navaporn Chadchavalpanichaya, Atchara Suwannakin, Gulapar Srisawasdi


Objective: The aim of this study was to find a technique to make a disposable monofilament which is accurate and affordable for Thailand context. A prototype of local made monofilament was developed and tested with the calibrated universal machine test to evaluate its performance compared with the commercial monofilament. Effect of the uncontrolled humidity condition on the performance of the commercial monofilament was also studied.
Review of literature showed no published specifications of the monofilament. The investigators set the concepts that materials must be locally available and affordable.  Also, the unit cost must be affordable for primary care units in Thailand. Monofilament’s fabrication technique was developed and the accuracy test of monofilament force was performed and compared with the commercially available monofilament.
The specification of locally made disposable 10-gram Semmes-Weinstein monofilament was identified. The force of the monofilaments developed was in an acceptable range for a standard clinical practice and comparable to the commercially available monofilament. From the study, the effect of Thailand’s humidity conditions can deteriorate the performance of the monofilament. The investigators decided to use a disposable monofilament one to ensure its hygiene and accuracy.
The local made disposable 10-gram Semmes-Weinstein monofilament was developed. The material is available and affordable for Thailand context. The accuracy of the monofilament’s force was measured by a calibrated testing apparatus.  Availability, durability, and cost are important issues to be concerned with medical tools that have been recommended to use worldwide. The result from this study could be applied to other countries that have similar conditions as Thailand.


Monofilament; disposable; specification; humidity

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