RU2639859C1 - Foot for inclined cuts to blade holder - Google Patents

Abstract

FIELD: medicine.SUBSTANCE: foot consists of an insert and a foot with a scale to control the cut length, a removable head with a limb to set the cut depth. The center of the arc of the foot sole is displaced relative to the center of foot rotation, which provides a uniform increment in the cut depth when the foot is rolled behind the blade along the cut, if possible, the depth at the initial point of the cut varies. The insert made of stainless tape partially replicates the blade holder profile and creates tension to hold it in the position set by the removable head with the limb. The head serves as a mechanism for cut depth setting. The ejector is used to remove the foot from the blade holder. When cutting, the foot for inclined cuts allows to replace "sliding" with "rolling".EFFECT: increased application efficiency.10 dwg

Description

The invention relates to medical equipment and can be used during microsurgical operations on the cornea of the eye, which require a dosed deepening of the incision from the center to the periphery, for example, removal of pterygium with peripheral layer-by-layer keratoplasty, refractive.

Known conductor Dr. Marinoff for incisions with radial keratotomy. IOL & OCULAR SURGERY NEWS, MAY 15, 1984 volume 2, number 10, p 28 "Marinoff Incision Guide For Radial Keratotomy" by Gerald P. Marinoff, MD.

The jig has a long holder attached to the working part and is designed to fix the cornea, control intraocular pressure, and has a slot for a microsurgical knife. The surgeon presses a conductor on the cornea with different efforts to achieve stable fixation and, if necessary, increase intraocular pressure. Fixation is provided by two sharp spikes on the lower part, which pierce the cornea in the limb. After the surgeon is convinced that the conductor is installed according to the marking, he places the knife in the slot and performs in one pass an incision with a recess from the center to the periphery, which is achieved by reducing the thickness of the conductor from the center to the periphery. The author suggests having a set of conductors for producing sections with a different slope.

The use of cumbersome construction conductors for two-handed operation with excessive confidence in a preliminary estimate of the thickness of the cornea and the lack of direct control over the incision can lead to disaster.

The aim of the invention is to get rid of these disadvantages: replacing the sliding of the foot on the “rolling” with a straight gentle cut, separating the mechanism for setting the depth of cut from the blade holder, controlling the length of the cut during the operation on the measuring scale of the foot, while maintaining visual control when maintaining the cut, minimizing the risk, in the event of a puncture, is exacerbated by a through cut, facilitating cleaning and sterilization.

The invention is illustrated by drawings.

FIG. 1 - foot for gentle cuts in the blade holder.

FIG. 2 - foot for gentle cuts assembly.

FIG. 3 is a diagram of the operation of the foot in the insert.

FIG. 4 - position of the center of the arc of the sole of the foot and the center of rotation of the foot.

FIG. 5 is a diagram of the operation of a foot on a plane.

FIG. 6 is a diagram of the operation of a foot on a spherical surface.

FIG. 7 - details of the foot.

FIG. 8 - ejector.

FIG. 9 - blade holder with a foot for gentle cuts and a head.

FIG. 10 - device head and sleeve with an incomplete thread.

In FIG. 1 shows a foot for shallow cuts in a blade holder for disposable metal microsurgical blades of the “shoe knife” type.

In the blade holder, rolled by stamping from one section of an elastic stainless tape into an open profile, a cylindrical insert of 1 foot for gentle cuts is inserted, rolled from a section of stainless tape into an open profile, partially repeating the contours of the blade holder so that when inserted the contacting parts due to the elasticity of the material and open profile of structures, compensate for errors in the performance of parts, creating a tightness sufficient to hold the insert in a given position.

Across the insert 1, the axis 2 passes through the through holes with the locking washer 3 pressed on it, which prevents the axis from shifting. A foot 4 sits freely on the axis, which has only one degree of freedom of rotation within 12 °, limited by the insert body, while the center of the arch of the sole of the foot 5 is offset from the center of rotation of the foot 6, which gives a uniform increment in the depth of cut when rolling the foot behind the blade along the cut as in the plane of FIG. 5 and on the spherical surface of FIG. 6, if possible, vary the depth at the starting point of the section. A spring 7 is fixed at the upper end of the foot, returning the foot to its original position when the sole of the foot pads in contact with the fabric, the free end of which holds the stopper 8.

To control the length of a gently sloping fabric incision, tab 4 has a scale of 9 with a division price of 0.1 mm. The end face of the insert 1 has the shape of an incomplete thread turn 10. The foot is moved relative to the blade holder using the head 11 with a pressed sleeve 12 having an end face in the form of one incomplete thread turn, which corresponds to the counterpart 10 at the end of the insert 1.

For operation, insert 1 is inserted into the blade holder from the blade side flush with the cylindrical part of the blade holder, after which the head 11 with the limb is put on the blade holder so that the wide risk 13 coincides with the slot on the blade holder and, resting on the end face of the blade holder, turn the head, thereby extruding the foot itself, by the desired amount, forward, or simply by choosing the appropriate size along the limb, immediately push insert 1 forward, and then remove the head 11, which is excessive during the operation.

Since the blades have a certain spread in length, the size of the protrusion of the blade for the foot, if necessary, can be checked in the traditional way on the measuring ruler and adjusted. The maximum movement of the foot relative to the blade holder under the action of the head 11 is 1 mm, the division price on the limb is 0.05.

Rolling after the blade in a straight line, the foot does not peel the epithelium, but holds the tissue in the cut zone at a distance of up to 4 mm.

An ejector is used to remove the presser foot from the blade holder body (Fig. 8).

The blade holder position close to normal is optimal for both the blade and the foot.

The location of the foot relative to the blade is convenient for right-handers, and for left-handers, a mirror version is possible.

Foot length for gentle cuts 52.3 mm, diameter 6.2 mm, foot width 6 mm, weight 2.5 g.

Head length 18 mm, diameter 12.2 mm, weight 8.6 g. Ejector length 60 mm, weight 2.5 g.

Claims (1)

A foot for gentle cuts to a blade holder for disposable metal microsurgical blades, comprising an insert with a foot and a removable head, in the form of a feed mechanism for the foot relative to the blade holder, characterized in that it is made integral, the insert folded from stainless steel tape into an open profile, partially repeating the profile of the blade holder from stainless tape, creating due to the elasticity of the tape tightness sufficient to hold the insert mounted on the transverse axis with a pressed lock washer, an obstacle axis displacement, while the center of the foot sole’s arc with the scale is offset from the center of rotation of the foot, a spring is fixed on the opposite side of the foot, returning the foot to its original position when the sole of the foot contacts the fabric, the free end of the spring holds the stopper, and the detachable head with the limb is worn on the blade holder, with the possibility of rotation and ejection of the blade holder having a counterpart on the insert, to a distance of 1 mm, with the end face of the sleeve pressed into the removable head, made in the form of an incomplete coil would.

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