Design Innovation Paper

An Experimental Low-Cost Ultrasonic Phacoemulsifier—A Prototype Test

[+] Author and Article Information
Branislav Tomasevic

Ophthalmology Clinic,
Clinical Center Nis,
Boulevard Zorana Djindjica 48,
Nis 18000, Serbia
e-mail: banetom62@gmail.com

Srdjan Glisovic

Faculty of Occupational Safety,
University of Nis,
Carnojevica 10a,
Nis 18000, Serbia
e-mail: srdjan.glisovic@znrfak.ni.ac.rs

Ruzica Jankovic-Tomasevic

Cardiovascular Clinic,
Clinical Center Nis,
Boulevard Zorana Djindjica 48,
Nis 18000, Serbia
e-mail: ruskajankovic@gmail.com

1Corresponding author.

Manuscript received March 16, 2014; final manuscript received November 2, 2014; published online November 26, 2014. Assoc. Editor: Rupak K. Banerjee.

J. Med. Devices 9(1), 015001 (Mar 01, 2015) (6 pages) Paper No: MED-14-1150; doi: 10.1115/1.4029048 History: Received March 16, 2014; Revised November 02, 2014; Online November 26, 2014

The structure and the features of a low-cost ultrasonic phacoemulsification prototype device are described in this paper. The phacoemulsifier was designed to comply with the techniques of modern cataract surgery. The functionality and reliability of the device were confirmed through in vitro experiments and animal studies. The device was designed to minimize surgical trauma: Reduced heat dissipation was achieved by specific power modulation, while the original design of aspiration control assured a reduced surge effect. In order to assess the suitability of the device, phacoemulsification was performed on rabbit eyes with nuclei of medium hardness. Their recovery was closely observed and only mild inflammation caused by surgical trauma was noticed. The device performed well in terms of reliability, ergonomics, and controllability throughout the experiments.

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Fig. 2

The prototype phacoemulsifier: 1—irrigation valve, 2—aspiration line and peristaltic pump, and 3—vacuum chamber

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Fig. 1

The structural scheme of the prototype

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Fig. 3

Cross section of the handpiece: 1—ultrasonic transducer, 2—booster, 3—phaco tip, 4—aspiration line, and 5—irrigation line

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Fig. 4

The animal experiment: rabbit eyelids fixed with two blepharostats; phaco tip and phaco spatula inside the anterior chamber during the phacoemulsification

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Fig. 5

Rabbit's eye anterior segment 21 days after the surgery (slit lamp, 8× magnified)

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Fig. 6

(a) Corneal section of the healthy eye: E—epithel, S—stroma, and D—descemet membrane and (b) corneal section at the location of incision 21 days after the surgery: thinning, hypertrophy, and edema of the epithelium in the area of the incision line (hematoxylin eosin stained, ×100 magnified)



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