GB2369056A

GB2369056A - Resection squint muscle hook

Info

Publication number: GB2369056A
Application number: GB0027835A
Authority: GB
Inventors: Ahmed Abdel-Rahman Assaf
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-11-15
Filing date: 2000-11-15
Publication date: 2002-05-22
Anticipated expiration: 2020-11-15
Also published as: GB0027835D0; GB2369056B

Abstract

Muscle hook consists of two hooks (A and B) sliding on the top of each other to vary the distance between the two ends of the hook. This distance reflects the amount of muscle resection required. The end of one of the hooks is flat and grooved in which the groove acts as reference for the inner side of the second hook. The flat end acts as a platform to pass the sutures before resection at the desired distant as indicated by the groove on the platform. The hooks are held together by a retaining pin (R) and there may be a calibrated scale (S) on the top of the device.

Description

RESECTION SQUINT MUSCLE HOOK TECHNICAL FIELD This invention relates to a muscle hook to be used in squint (strabismus) eye surgery.

BACKGROUND Muscle resection in squint surgery is at present performed by stretching the eye muscle between two muscle hooks by an assistant. The surgeon then measures the amount of resection required using a calibre before passing his sutures in the muscle. This always requires an assistant (4 hands). Additionally, the amount of muscle stretch performed by the assistant is variable perhaps affecting the amount of muscle resection and hence the outcome of surgery.

ESSENTIAL TECHNICAL FEATURES Resection squint muscle hook is essentially composed of 2 hooks on the top of each other. A Flat grooved muscle hook (hook A) that is attached to another strabismus hook (B). Either of these hooks could be on the top. A retaining pin keeps the two hooks attached to each other (P). These two hooks slide on each other for a distance of 3-15 mm (the distance on the scale could be could be 0-15 mm or more) the normal amount of eye muscle resection. A calibration scale (S) on the upper surface of hook-A that shows the amount of slide against a mark (M) on hook-B, which is here on the retaining pin. The selected calibration reflects the distance (C) between the groove (G) on hook-A and the inner side of hook-B. Distance C can be adjusted depending on the desired amount of muscle resection. The two hooks can be locked in the desired position at the chosen distance by a locking screw (L). Right or left resection squint muscle hook can be made for right or left handed surgeons.

Figure 1 Shows Resection Muscle Hook-top view.

Figure 2 Shows Resection Muscle Hook-side view.

Figure 3 shows the scale.

Figure 4 shows the ends of the hooks METHOD OF APPLICATION The muscle to be resected is isolated in the usual way. The distance C between hook-A and the groove in hook-B is adjusted according to the planned amount of muscle resection. The locking screw is tightened in that position. Hook-A is placed under the muscle insertion while hook-B lies under the muscle belly. The muscle is pulled towards the surgeon and the suture is placed in the muscle with the groove on hook-A acting as a guide. After passing the sutures the muscle is cut and attached in the usual way.

Claims

CLAIMS 1. A muscle hook device for use in eye squint (strabismus) surgery comprising of two hooks kept together by a retaining pin; the hooks composed of handles and end portions; the two hooks slide relative to one another so as to vary the spacing between the hook end portions; the two hooks can then be locked together by a locking screw (or other mechanism) in the desired position after setting the distance between the end portions.
2. A muscle hook device as claimed in Claim 1 wherein the two hooks slide on each other for a distance between 3-15 nun along a calibrated scale on the top view of the device for ease of viewing; the distance as indicated by the calibration scale is indicative of the distance between the groove on the flat end of the first hook and the inner aspect of the hook end of the second hook.

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3.. A muscle hook device substantially as described with reference to Figures 1-4 of the accompanying drawings.

2. A muscle hook device as claimed in Claim 1 wherein one end of the hooks is flat and grooved, the groove will act as reference to the distance from the end of the second hook; the end of the second hook could take the shape of a standard muscle hook or any other squint hook form used to hook the extra-ocular muscles.

3. A muscle hook device as claimed in Claim 2 wherein the two hooks slide on each other for a distance between 3-15 (could be 0-15 mm or more) along a calibrated scale on the top view of the device for ease of viewing; the distance is taken as the distance between the groove on the flat end of the first hook and the inner aspect of the hook end of the second hook.

4. A muscle hook device substantially as described with reference to Figures 1-4 of the accompanying drawings. Amendments to the claims have been filed as follows CLAIMS 1. A muscle hook device for use in eye squint (strabismus) surgery comprising of two hooks kept together by a retaining pin wherein each hook is composed of a handle and end portion and the two hooks slide relative to one another so as to vary the spacing between the hook end portions; a locking screw (or similar mechanism) to lock the two hooks in the desired position after setting the distance between the end portions; wherein the end portion of one the hooks is flat and grooved while the end portion of the second hook takes the shape of a standard muscle hook or any other squint hook form used to hook the extra-ocular muscles.