Research and Development of Testing Device for Evaluating Force Transmission, Friction, and Contact Pressure Distribution of Surgical Spring Forceps (Tweezers)

Zhu, Rui; Takamura, Yuma; Yamamoto, Ikuo; Matsumoto, Keitaro; Nagayasu, Takeshi

doi:10.18494/sam.2021.3207

Cited by 1 publication

(2 citation statements)

References 16 publications

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“…We have previously reported a testing device developed to measure forceps function ( Figure 2a ). 11 A hydraulic-driven system (HDS) based on syringes and syringe pumps is used for driving the left–right symmetrical lever linkage system of the device. A simple real-time feedback control system was built to remotely control the bars of the operating tweezers and monitor the forces on the jaws.…”

Section: Methodsmentioning

confidence: 99%

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Development of Medical Shark Skin Forceps: Improved Grasping Power and Easy Manipulation

Takamura,

Tominaga,

Zhu

et al. 2023

JSLS

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Background and Objectives: Important safety requirements for forceps used in surgical procedures are the ability to stably grasp fine tissue and to cause minimal tissue damage. Shark skin has the structural feature of circumpolar scales, which increase the frictional force of the scales by roughening their surface. We have developed and patented medical forceps with a shark skin pattern placed on the tip surfaces. The aim of this study was to examine the safety and efficacy of the shark skin forceps compared with existing forceps, both fundamentally and clinically. Methods: To evaluate gripping power and usability, we compared bead transfer times for each forceps type. Grasping force and frictional force were measured quantitatively and compared among the types. To evaluate safety, we performed pathological examination of lung and urethral tissue after grasping, in an animal experiment. Subjective assessment of user experience was then performed using a questionnaire. Results: In the dry lab assessment, transfer time was fastest using the shark skin forceps (34 s vs 61 s and 62 s, p < 0.05). Frictional force values were highest for the shark skin forceps (p < 0.05). In the animal experiment, there was no difference in pathological tissue damage to lung or ureter tissues among the forceps types after grasping. The questionnaire responses indicated advantages of the shark skin forceps in terms of ease of grasping membranes and lower degree of grasp failure. Conclusion: Forceps with shark skin on the tips showed greater stability of tissue grasping and equivalent safety compared with existing forceps.

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Section: Methodsmentioning

confidence: 99%

“…After extraction of the frictional force values during the change from static to dynamic friction, the ratio of frictional force to holding force was calculated for each type of forceps and compared among types, as decided in consultation with an engineer. 11 …”

Section: Methodsmentioning

confidence: 99%