A study for lens capsule tearing during capsulotomy by finite element simulation

Han, Shaofeng; He, Changyan; Ma, Ke; Yang, Yang

doi:10.1016/j.cmpb.2021.106025

Cited by 10 publications

(6 citation statements)

References 30 publications

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“…In Section 3.4, the VF/operation force of peeling ALC from the human lens is smaller than the VF/operation force of performing CCC on ex‐vivo pig eyes. This is caused by the pig lens capsule is thicker than the human lens capsule 17 . Besides, the tremor amplitude during the human procedure is smaller than in animal procedures.…”

Section: Discussionmentioning

confidence: 91%

“…than the human lens capsule. 17 Besides, the tremor amplitude during the human procedure is smaller than in animal procedures. This is because the ex-vivo human lens is used in the experiment, which excludes the effect of eye movement/distortion.…”

Section: Discussionmentioning

confidence: 99%

“…For operation force, an optical sensing interrogator (Si155, Micron Optics Inc.) is used to monitor the FBGs. Following the calibration process presented in 17, the total root means square error is 0.41 mN (calibration load: 20 mN), 1.47 mN (calibration load: 50 mN). The sampling frequency of optical sensing interrogator is 1000 Hz.…”

Section: Methodsmentioning

confidence: 99%

“…16 However, few studies have reported the real-time operation force and physiological tremor during CCC. Our previous work 17 measures peeling force while performing CCC on ex-vivo pig eyes. However, the VF and IF are not distinguished, the physiological tremor is not measured, and the operation behaviours of novice and expert are not compared.…”

mentioning

confidence: 99%

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Operation behaviours of surgical forceps in continuous curvilinear capsulorhexis

Zheng

Lin

Guang

et al. 2022

Robotics Computer Surgery

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Background Continuous curvilinear capsulorhexis (CCC) is a delicate ophthalmic procedure which may benefit from robot technology. Measuring the behaviours (physiological tremor, operation force) of surgeons provides baseline data to develop assistive CCC robot. Methods A forceps with fibre bragg grating and inertial sensors is used to measure the surgeons' behaviours while experts/novices perform CCC on ex‐vivo pig eyes, in‐vivo rabbit eyes and ex‐vivo human lens. Results In pig/rabbit tests, the root‐mean‐square (RMS) tremor amplitude is 35.26/59.04 μm (expert/novice, transverse), 13.3/20.55 μm (axial). The RMS voluntary force (VF) and involuntary force (IF) are 8.97/17.16 mN, and 0.66/1.90 mN, respectively. In human lens test, the RMS tremor amplitude is 24.0 μm (transverse, expert only), 9.88 μm (axial). The RMS VF and RMS IF are 9.04 mN (expert only) and 0.17 mN, respectively. Conclusions The expert surgeons have better precision and less operation force.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Operation behaviours of surgical forceps in continuous curvilinear capsulorhexis

Zheng

Lin

Guang

et al. 2022

Robotics Computer Surgery

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“…Four patients received this technology in a phase I clinical trial, which proved the feasibility and safety of robot-assisted 100-micron intravenous cannula and 10 min anticoagulant injection to dissolve blood clots. Besides, researchers from UCLA ( Chen et al, 2018 ; Gerber et al, 2020a ), IACAS ( Zhang et al, 2021b , a ), and BHU ( Chang-Yan et al, 2018 ; Han and Yang, 2019 ; Han et al, 2021 ; Han and Yang, 2021 ), among others ( Liu et al, 2018 ; Sumimoto et al, 2019 ; Huda et al, 2020 ; Liu et al, 2020 ; Suzuki and Wood, 2020 ) conducted a series of trials on the precise perception and accurate manipulation of microscopic surgery.…”

Section: Introductionmentioning

confidence: 99%

An automatic drug injection device with spatial micro-force perception guided by an microscopic image for robot-assisted ophthalmic surgery

Wei

et al. 2022

Front. Robot. AI

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Retinal vein injection guided by microscopic image is an innovative procedure for treating retinal vein occlusion. However, the retina organization is complex, fine, and weak, and the operation scale and force are small. Surgeons’ limited operation and force-sensing accuracy make it difficult to perform precise and stable drug injection operations on the retina in a magnified field of image vision. In this paper, a 3-DOF automatic drug injection mechanism was designed for microscopic image guiding robot-assisted needle delivery and automatic drug injection. Additionally, the robot-assisted real-time three-dimensional micro-force-sensing method for retinal vein injection was proposed. Based on the layout of three FBG sensors on the hollow outer wall of the nested needle tube in a circular array of nickel-titanium alloys, the real-time sensing of the contact force between the intraoperative instrument and the blood vessel was realized. The experimental data of 15 groups of porcine eyeball retinal veins with diameters of 100–200 μm showed that the piercing force of surgical instruments and blood vessels is 5.95∼12.97 mN, with an average value of 9.98 mN. Furthermore, 20 groups of experimental measurements on chicken embryo blood vessels with diameters of 150–500 μm showed that the piercing force was 4.02∼23.4 mN, with an average value of 12.05 mN.

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Optimal design of a hybrid compliant mechanism considering the dynamic behavior of membrane-loaded

Zheng,

Liu,

Tao

et al. 2024

Nonlinear Dyn

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A study for lens capsule tearing during capsulotomy by finite element simulation

Cited by 10 publications

References 30 publications

Operation behaviours of surgical forceps in continuous curvilinear capsulorhexis

Operation behaviours of surgical forceps in continuous curvilinear capsulorhexis

An automatic drug injection device with spatial micro-force perception guided by an microscopic image for robot-assisted ophthalmic surgery

Optimal design of a hybrid compliant mechanism considering the dynamic behavior of membrane-loaded

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