RU201390U1 - Detachable ring retractor - Google Patents

Abstract

The useful model relates to medicine, in particular to surgery, and can be used as an additional device in carrying out various abdominal and thoracic surgical procedures. The technical result of the development is the creation of a split ring retractor, which ensures the performance of surgical operations in any hard-to-reach places of the patient's body, as well as an increase in the convenience of the surgeon's manipulations by achieving the possibility of installing a split ring attachment point with retraction mirrors of various modifications at any desired angle, relative to the plane of the wound and the operating table , while maintaining the necessary stability of the structure. The unit for attaching the mirror to the detachable retractor according to the claimed technical solution contains a clamping mechanism in the form of 2 stop corners, an eccentric clamp, a washer and a pin with a hole for installing the mirror, while the corners' jaws wrap around the ring, when clamped with an eccentric clamp, the ring and the mirror are simultaneously clamped , and in the unclamped state allows tilt around the ring and rotation of the mirror along the axis of the finger, while the mirror rod can move in the hole of the finger back and forth and around its axis. The washer between the eccentric clamp and the lower stop angle provides a gentle sliding of the eccentric clamp jaws, which generally allows the ring and the mirror to be clamped or released simultaneously. 2 wp f-crystals, 4 fig.

Description

The useful model relates to medicine, in particular to surgery, and can be used as an additional device in carrying out various abdominal and thoracic surgical procedures.

Known detachable ring retractors (devices) designed to expand tissue dissection and hold the edges of the wound during surgery, for example, rack retractors manufactured by JSC "Medical Instrumental Plant. M. Gorky", p. Tumbotino, Nizhny Novgorod region. There are also known other ring retractors (US patent No. 4010741 from 03/08/77, US patent No. 4254763 from 03/10/81, RF patent No. 200822, publ. 03/15/95). The most perfect is a ring retractor (RF patent No. 2177266, publ. 27.12.2001. Ring retractor), which is installed above the patient and contains a stand, which is fixed on the operating table, a ring with retraction mirrors and a console. The disadvantages of this model of a ring retractor are: the presence of a large number of nodes, which makes the model cumbersome and difficult to operate, process and sterilize; the presence of a single ring with retraction mirrors, which does not make it possible to lift the opposite edges of the wound in relation to each other, however, this manipulation is often necessary when performing cavity operations in hard-to-reach places; retraction mirrors have the ability to move only in two directions relative to the axis of the ring, that is, the number of degrees of freedom is sharply limited; the presence of a single stand does not provide the necessary structural strength, and its connection at a right angle to the console is inconvenient for the surgeon.

There is also known a surgical retractor, in which the organ retraction unit with mirror attachment is made in the form of a spherical hinge with a collet clamp and is fixed by means of a hinge with three degrees of freedom (RF patent No. 2372859 from 20.06.2008. Surgical retractor). The disadvantages of the model are a hinge assembly with a collet clamp, which makes the model bulky and difficult to operate, handle and sterilize.

Known attachment point (release clamp) for attaching surgical auxiliary agents (mirrors), on a frame system (EP patent No. 2151197 B1 dated 06.08.2008. Quick tensioning clamp for attaching surgical aids such as retractors or peripheral operation technology on a frame system).

The disadvantages of the patent are: a clip in the form of a clothespin; the clamp is on top, interferes with the doctor, touches the gown.

Known is a split ring retractor, in which the retraction mirrors are fixed on the ring by a fastening unit consisting of an angular bracket, on the edges of which clamping clamps are installed, driven by nuts. In this case, at least two nuts are used: moving the mirrors perpendicular to the edge of the split ring retractor and setting it in the required position, moving the mirrors longitudinally to the edge of the split ring retractor and providing rotation around the edge, and washers are installed in the attachment unit to increase the friction force (patent RF on PM No. 70110 dated 02.02.2007. Detachable ring retractor / Parkhisenko YA, Krivonosoe SV). The disadvantages are: there is no rotation of the circular retractor mirror relative to the axis of the upper clamping nut; one nut on top, another on the side, inconvenience of the doctor's work, there is not enough effort to tighten the nuts; the presence of fixed slots excludes the rotation of the mirror around the axis of the mirror rod, increased installation time.

Also known is a split ring retractor containing a stand, which is reinforced with a clamp to the operating table, a bar with a coupling for holding the bar with half rings and retraction mirrors at any angle relative to the plane of the operating table at one end of the bar, couplings for attaching two half rings at the other end of the bar, and retraction attachment points mirrors to the half-rings of the retractor, while the attachment points contain a clothespin with simultaneous fixation of the split half-ring and the retraction mirror with a thumbscrew, a finger with a hole for fixing the mirror, a finger stopper, a lever for enhancing fixation of the half-ring and a mirror, a bushing for pressing the lamb to the mirror rod, a pin for holding the finger in a clothespin. In this design of the detachable ring retractor, the mirror attachment unit in the unclamped state is configured to tilt relative to the retractor half-ring and rotate the mirror around the axis of the finger, while the rod is configured to move in the finger hole back and forth and around its axis (RF patent for PM No. 188013 dated 08.24.2018. Detachable ring retractor / Eroklintsev V.N. and others). The disadvantages are: the duration of the installation time, about 4-5 s; the complexity of manufacturing, turning, milling work; wear of threaded connections due to the operations of twisting, untwisting, sterilization.

The technical result of the development is the creation of a split ring retractor, which ensures the performance of surgical operations in any hard-to-reach places of the patient's body, as well as an increase in the convenience of the surgeon's manipulations, by achieving the possibility of installing a split ring attachment point with retraction mirrors (and / or blades, blades) of various modifications under any the desired angle relative to the plane of the wound and the operating table, while maintaining the necessary stability of the structure.

The technical result is achieved by the fact that a kinematic pair of the retraction mirror attachment point to the split ring is added to the design of the split ring retractor. The attachment point is made in the form of 2 thrust corners made of stainless medical steel 12X18H10T according to TU 3-1002-77. The surface of the attachment point is matte, which excludes glare from operating lamps. This design provides the movement of the retractor mirror in any planes, both separately and together with the separable half rings of the retractor.

The proposed device of a detachable ring retractor facilitates surgical access to the operating field by making it possible to install the mirror at any angle necessary for performing surgical manipulations relative to the plane of the operating table, reduces the attachment time to 1-2 s, increases the retractor's service life, and reduces the number of manipulations for its installation. easier to manufacture due to the elimination of turning work.

Explanations for drawings:

fig. 1 - general view of a detachable ring retractor during a surgical operation, where: 1 - a stand, 2 - a bar, 3 - a clamp, 4 - a sleeve, 5 - a half ring, 6 - a retraction mirror, 7 - an attachment point,

fig. 2 - unit for attaching the mirror to a split ring retractor, where: 8 - upper stop angle, 9 - lower stop angle, 10 - eccentric clamp, 11 - axis, 12 - washer, 13 - pins with a hole. The dimensions of the mirror attachment point are: 150-155: 60-65: 30-35 mm, the thickness of the corners is 5-6 mm, the hole in the upper part of the finger is 8-9 mm in diameter, the inner diameter of the bend under the retractor ring is 12-13 mm, tightness under the mirror and the ring - 0.1-0.5 mm,

fig. 3 - fixing the attachment point,

fig. 4 is a diagram of the location of the attachment unit parts

The detachable ring retractor contains a stand 1, which is reinforced with a clamp 3 to the operating table, a rod 2 with couplings 4 for attaching two half rings 5 at one end, and at the other end for holding half rings with retraction mirrors 6 above the operating table, and attachment points 7 for retraction mirrors to ring. The attachment unit contains a clamping mechanism in the form of 2 abutment corners 8 and 9, an eccentric clamp 10, a washer 12 and a pin with a hole 13 for installing a mirror, while the corners' jaws wrap around a half ring, when clamped with an eccentric clamp, the half ring and the mirror are simultaneously clamped.

Mirror attachment unit of the ring retractor in the unclamped state allows tilting around the ring and rotation of the mirror along the axis 11 of the finger, while the mirror rod can move in the hole of the finger back and forth and around its axis.

The retractor mirror attachment unit contains a washer 12 between the eccentric clamp and the lower abutment angle 9 to ensure smooth sliding of the eccentric jaws.

The eccentric clamping of the ring retractor ensures that the half ring and the mirror are simultaneously clamped or released.

Description of the operation of the split ring retractor.

When installing a detachable ring retractor and the attachment point to the retractor ring (frame), the eccentric is lowered down, the assembly itself is released. The mirror is inserted into the hole of the finger, moved to the required distance at the required angle to the operating table. The unit in the unclamped state allows tilting around the ring, and rotation of the mirror along the axis of the finger, while the mirror rod can move in the hole of the finger back and forth and around its axis. The eccentric tightens the ring and the mirror at the same time. To enhance the fixation of the ring and the mirror, it is possible to tighten the finger by rotating the eccentric clockwise with a force of 10-15N. A caprolon washer between the eccentric and the lower stop angle ensures smooth sliding of the eccentric jaws, the eccentric curvature radius is 15-20 mm. The eccentric clamping or releasing the half ring and the mirror at the same time. All parts of the split ring retractor are made in the standard version, only the unit for attaching the retraction mirror to the half rings of the split ring retractor is new.

Claims (3)

1. A detachable ring retractor containing a stand, which is fastened with a clamp to the operating table, a bar with couplings for attaching two half-rings at one end, and at the other, for holding half-rings with retraction mirrors above the operating table, and assemblies for attaching retraction mirrors to the ring, characterized by that the attachment points contain a clamping mechanism in the form of 2 persistent corners, an eccentric clamp, a washer and a finger with a hole for installing a mirror, while the corners' jaws encircle a half-ring, when clamped with an eccentric clamp, the half-ring and the mirror are simultaneously clamped. 2. The detachable ring retractor according to claim 1, characterized in that the mirror attachment unit in the unclamped state allows tilting around the ring and rotation of the mirror along the axis of the finger, while the mirror rod can move back and forth in the finger hole and around its axis. 3. A detachable ring retractor according to claim 1, characterized in that the eccentric clamp provides for clamping or releasing simultaneously the half-ring and the mirror.

Images