The body of a device for positioning a coronary stent in a coronary artery or pulling a catheter transducer for intravascular ultrasound

Abstract

The main body of the device is used to position a coronary stent or pull a catheter transducer for intravascular ultrasound, and the main body consists of a front part and a rear part, each of which includes two similar half parts, a ring on the front smooth part of the main body and a support on the rear part of the rear part of the main body. The rear part of the main body overlaps the front part of the main body. The front part of the main body is truncated on one side and extends continuously on the opposite side in the form of a smooth cylindrical part of a smaller diameter and a slide guide. A cylindrical groove with a dot-shaped element is provided on the side of the slide guide along the circumference of the cylindrical part of the front part of the main body. The cylindrical support is mounted on the rear part of the main body.

Description

Technical Field

[0001] The present invention relates to a body of a device suitable for positioning a coronary stent on a delivery system in the most accurate, rapid and safe way in medicine to perform intravascular coronary stenting or to pull a catheter transducer for intravascular ultrasound (IVUS). Background Art

[0002] When the device is used to pull a catheter transducer, such a catheter transducer is installed in the device in much the same manner as it is installed in a coronary stent delivery system.

[0003] For intravascular imaging, the guide catheter is appropriately mounted within the coronary ostium so that the guide catheter can be pulled through the target stenosis to the distal artery. The device is placed on the digital IVUS catheter in the same manner as it is typically placed on a coronary stent delivery system. Revolution (Volcano (Philips)) type mechanical transducers or other similar devices cannot currently be used due to the specific characteristics of their traction mechanism. The device is placed as close as possible to the proximal segment of the delivery catheter, that is, the segment where the delivery catheter is connected to the workstation or built-in interface by a guide. The transducer is moved by a guide to a distance of 30 mm to 40 mm beyond the target segment. When in the appropriate area, the device is fixed to the digital IVUS catheter, and then the body of the device is rotated and the device is slowly moved using a process similar to the stent positioning process to obtain a high-precision estimate of the segment. Summary of the invention

[0004] Known on the medical device market are devices for positioning stents in coronary arteries proposed by the same applicant (RU2598798, RU2652732, RU2650038, RU2661092, RU2710216), the main body of which is different from the proposed invention, which has the following advantages:

[0005] - Easy and short assembly of the device body thanks to the supports and the rings, since no glue is needed to join the parts;

[0006] - Higher product strength due to the support and the large number of tapered protrusions and their matching tapered holes in the front part of the device body;

[0007] - the front part of the device body has greater rigidity when the holder is in operation, this rigidity being provided by a thicker wall of the front truncated part of the body in the area of ​​the holder lugs, with the greatest possible number of conical protrusions and matching conical holes made along the edge of the thick wall;

[0008] - No tube is required to position the coronary stent on the delivery system within the device, this positioning being provided by the rounded corners in the front truncated portion of the body and the chamfers on the rear end portion of the body and the slideways in their central holes;

[0009] - Improved product performance during coronary stent positioning due to the additional wall interconnecting the guide providing greater rigidity of the slide guide;

[0010] - No need for gluing and enhanced matching of the guide with the slideway at the front of the body, thanks to the provision of a transverse wall with a conical protrusion and a matching conical hole at the end of the guide;

[0011] -Possibility to pull the catheter transducer using the device body;

[0012] - greater rigidity of the joint of the rear half-parts of the body due to the additional longitudinal grooves and longitudinal projections along the edge of the inside of the rear part of the body in the overlapping area;

[0013] - Maintaining the integrity of the device body during operation, since the support is securely held by a protrusion at the rear end of the device body;

[0014] - When the coronary stent is positioned or the catheter transducer is pulled, the rear part of the device body can be easily rotated with the help of the ring due to the engagement of the parts;

[0015] - when the coronary stent is positioned, the support cannot move around the rear part of the body due to the longitudinal protrusions in the internal threaded area on the rear outer side of the body and the internal guides on the support;

[0016] - when assembling the body of the device, no precise positioning of the support relative to the rear of the body is required; assembly is simple and rapid due to the specially shaped longitudinal protrusions on the outside of the rear of the body of the device in the area of ​​the internal thread;

[0017] - The load on the operator's fingers to close the retainer is reduced, since the wall is angled with the point-shaped wall protrusions provided in the opening for the retainer lug and is designed to hold the retainer lug in the extreme position.

[0018] The claimed invention is industrially applicable.

[0019] The subject of the invention is the body of a device for positioning a coronary stent on a delivery system in a coronary artery or for pulling a catheter transducer for intravascular ultrasound.

[0020] The body consists of a retainer having a thickened portion with lugs, a slideway with a hole for accommodating a delivery system, and a cap with a hole for accommodating a delivery system with an elastic sleeve, the delivery system having a protrusion designed to engage with an internal double-start thread of the rear cylindrical portion of the body and having a protrusion for moving along a guide inside the body on one side; the elastic sleeve has a hole for positioning the delivery system on the inside of the cone and an end face corresponding to similar surfaces on the inside of the cap and at the end of the slideway, mounted in a threaded cap to be screwed on the slideway on the other side.

[0021] The mechanism housed in the body is the subject of an independent patent of the same applicant (patent RU2661092) and is cited here only for illustration and a better understanding of the claimed invention.

[0022] The device body consists of two components, one of which is basically a part that includes a truncated front part on one side and a cylindrical part on the opposite side, a smooth cylindrical part with a smaller diameter, and a guide for a slide, and the component forms the front part of the body, and the other component includes a part arranged on the smooth cylindrical part of the first component and a rear part with an internal double-start thread and a chamfered end face, and the component forms the rear part of the body.

[0023] The front part of the body is truncated on its front side and extends continuously on its opposite side in the form of a cylindrical part, a smooth cylindrical part of smaller diameter and a slide guide, which are interconnected by longitudinal walls and are provided with transverse walls at the ends, which have tapered holes and matching tapered protrusions to engage the half-parts of the body.

[0024] The front truncated portion of the body is adapted to be grasped by the fingers of the surgeon's left hand and is provided with a groove for this purpose to allow the surgeon to fix the device in a desired position, the groove also serving as a cushion for fixing the coronary catheter. In order to more conveniently arrange the coronary stent delivery system and the catheter transducer, the wall in the front truncated portion of the body is rounded on the inner side opposite to the groove for the fingers of the operator's left hand, where the wall contacts the mouth of the hole in which the delivery system is mounted.

[0025] Square openings for retainer lugs are provided on both sides of the front cylindrical portion of the body, and the wall of the front portion of the body is made thicker in the section between the openings for the retainer lugs. In each square opening, two point-shaped protrusions are located on one side at a distance equal to the width of the retainer lugs and are designed to retain the retainer lugs in the extreme position and to properly retain the retainer in the closed position, each protrusion having a flat wall which is at an angle to the protrusion on the retainer open position side and along which the retainer lugs slide when the retainer lugs change their position, thereby reducing the force applied by the operator's hand to rotate the retainer lugs to close the mechanism.

[0026] The front smooth cylindrical portion of the body has a ring fitted snugly thereon.

[0027] The ring has a groove made along its entire inner circumference, which groove is designed to receive a matching protrusion located along the circumference of the rear half of the body on the holder side in order to engage these half parts.

[0028] On the outer circumference of the ring, a trapezoidal groove is provided to receive a matching protrusion at the front end of the rear part of the body, the protrusion having a trapezoidal shape and designed to fix the rear part of the body in the ring to prevent it from rotating spontaneously, while allowing the operator to rotate the rear part of the body relative to the front part of the body through the ring.

[0029] A cylindrical groove with a point-shaped element is made on the side of the slide guide along the circumference of the end face of the smooth cylindrical portion of the front part of the main body, and the cylindrical groove is designed to engage with a matching protrusion with a point-shaped element, which is formed on the side of the surface with the double-start thread along the circumference of the inner smooth cylindrical surface of the rear part of the main body.

[0030] The rear cylindrical portion of the body has longitudinal projections and matching longitudinal grooves located on the inside thereof along the edges of the half-pieces in the area of ​​the smooth cylindrical surface and for engaging the rear half-pieces of the body.

[0031] The dot-like elements arranged on the inner smooth cylindrical surface of the rear part of the body along the circumference on the holder side are designed to reduce the friction between the rotatable parts of the body.

[0032] A cylindrical protrusion with a dot-shaped element is provided along the circumference between the smooth inner surface of the rear part of the main body and the surface with the internal double-start thread to engage the cylindrical groove on the slide guide side of the smooth cylindrical part of the front part of the main body so that the rear cylindrical part of the main body can rotate around its axis.

[0033] A longitudinal protrusion is made on the outer surface of the rear portion of the main body, and the ends of the protrusion are smoothly bent in opposite directions to center the support member assembled on the rear portion of the main body and prevent the support member from rotating spontaneously. A protrusion that fixes the support member in a hole along the circumference of the end face of the support member is located on the rear end face of the main body.

[0034] The support is fitted into the internal double-start threaded area of ​​the rear portion of the body.

[0035] The support is essentially a hollow cylinder with an inner longitudinal guide along its entire length to ensure a tight fit with the outer surface of the rear of the body, on the outer side of which a matching longitudinal protrusion is provided, the ends of which are smoothly bent in opposite directions and used to securely connect the support.

[0036] The holes made along the circumference of the end face of the support are used to fix the support on the surface of the rear part of the body by means of matching protrusions along the circumference of the end face of the rear part of the body.

[0037] Through holes are made in the front of the body, the slide, the cap, the elastic sleeve and the end surface of the rear of the body to introduce a coronary stent delivery system or a catheter transducer into the device, which is installed in the body.

[0038] To facilitate positioning of the coronary stent in the central through hole on a delivery system or catheter transducer within the device, chamfers are made on the sides of the slide end faces and in the rear of the body.

[0039] The main body is made of die-cast plastic and includes a front and rear section, each of which is made up of two half parts.

[0040] Each half of the front and rear parts of the body is a solid casting and after assembly of the mechanism, the two halves are joined together by means of conical projections and matching conical holes made along the inner edges of the front and rear parts of the body and on the transverse walls at the ends of the slideway guides. The maximum possible number of conical projections and matching conical holes is formed on the conical projections of the front part of the body and in the area between the openings for the retainer lugs.

[0041] The front half-pieces of the body are joined by means of conical protrusions and matching conical holes made along the inner edge of the entire body and conical protrusions and matching conical holes made in the transverse walls of the ends of the guides; after the front half-pieces of the body are joined, a ring is fitted on the front smooth cylindrical part of the body on the side of the guide for the slide, the ring having a groove into which the semicircular matching protrusions of the rear half-piece of the body are inserted, and the matching trapezoidal protrusions on the front semicircle of the body are inserted into the trapezoidal grooves made on the outer circumference of the ring, whereby the half-pieces are joined so that the front smooth cylindrical part of the body is accommodated in the half-piece of the rear smooth cylindrical part of the body, the circle with dot-shaped elements. The cylindrical protrusion is located between the inner smooth part and the part with internal double-start thread at the rear of the main body, and the cylindrical protrusion is inserted into the cylindrical groove of the smooth cylindrical part of the front of the main body. On the side of the slide guide, the half-part is engaged in the same way as the front of the main body by means of the conical protrusion and matching conical hole made at the rear of the main body and the longitudinal grooves and longitudinal protrusions on the periphery of the half-part at the rear of the main body, thereby forming an overlapping engagement with the front of the main body, so that the cylindrical support slides over the rear of the main body with double-start thread on the end face side until the support is fixed on the rear cylindrical part of the main body so that its inner longitudinal guide is located between the outer longitudinal protrusions, and the ends of the protrusions are smoothly bent in opposite directions.

[0042] Embodiment 2 of the present invention

[0043] According to this embodiment of the invention, the outer surface of the rear part of the body may be smooth, without longitudinal projections with smoothly curved ends, but with inner longitudinal projections on the inner surface of the support; in this case, the support is fixed to the rear part of the body due to the surface friction of the parts and the force provided by the deformation of the support. In this case, the diameter of the support should allow the support to fit tightly on the rear part of the body.

[0044] Embodiment 3 of the present invention

[0045] According to this embodiment of the invention, the rear end face of the main body may not have a protrusion along the circumference to fix the support member, and the support member may not have a matching hole, and in this case, one component is fixed relative to the other component due to the tight fit caused by friction and deformation of the support member. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is an overall view of the main body of the device, where:

[0047] 1 – Front of the body

[0048] 4 – The front truncated part of the main body

[0049] 5 – Finger Grooves

[0050] 7 – the cylindrical part of the front part of the body,

[0051] 14 – The rear of the body

[0052] 28 – Retainer

[0053] 30 – Retainer lug

[0054] 31 – Support

[0055] 34 - Ring at the rear of the body for fixing 41 - Thickened wall at the front of the body in the area between the retainer lug openings 51 - Trapezoidal protrusion at the rear of the body for engaging the ring.

[0056] Figure 2 is a side view of the device body, wherein:

[0057] 4 – The front truncated part of the main body

[0058] 5 – Finger Grooves

[0059] 10 – Dot-shaped protrusions for retainer lugs

[0060] 14 – The rear of the body

[0061] 28 – Retainer

[0062] 30 – Retainer lug

[0063] 31 – Support

[0064] 32 - holes along the circumference of the support end face for attachment to the rear of the body 34 - ring for fixing the rear of the body 41 - thickened wall of the front of the body in the area between the retainer lug openings.

[0065] Figure 3 is a top view of the subject, where:

[0066] 1 – Front of the body

[0067] 5 – Finger grooves,

[0068] 15-Protrusion along the circumference on the rear end face of the main body, used to fix the support

[0069] 28 – Retainer

[0070] 30 – Retainer lug

[0071] 31 – Support

[0072] 34 - Ring for fixing the rear part of the body 41 - Thickened wall of the front part of the body in the area between the retainer lug openings 51 - Trapezoidal protrusion of the rear part of the body for fixing in a ring.

[0073] Figure 4 is an overall view of the main body of the device, where:

[0074] 10 – Dot-shaped protrusions for retainer lugs

[0075] 14 – The rear of the body

[0076] 15-Protrusion along the circumference on the rear end face of the main body, used to fix the support

[0077] 21 – Through hole for coronary stent delivery system and catheter transducer

[0078] 28 – Retainer

[0079] 30 – Retainer lug

[0080] 31 – Support

[0081] 32 - holes along the circumference of the end face of the support for attachment to the rear of the body 34 - ring for fixing the rear of the body

[0082] 36 – Trapezoidal groove for fixing the ring at the rear of the body 41 – Thickened wall at the front of the body in the area between the retainer lug openings

[0083] 42 - chamfer with hole for delivery system in rear part of body 51 - trapezoidal protrusion of rear half of body secured by ring 54 - flat wall with point-like protrusion in square opening of retainer lug.

[0084] Figure 5 is a view of the main body of the device without the support members, wherein:

[0085] 1 – Front of the body

[0086] 14 – The rear of the body

[0087] 15-Protrusion along the circumference on the rear end face of the main body, used to fix the support

[0088] 28 – Retainer

[0089] 41 – Thickened wall at the front of the body in the area between the retainer lug openings

[0090] 50 - protrusion along the circumference of the rear half of the body joined by the ring 51 - trapezoidal protrusion of the rear half of the body fixed by the ring 52 - longitudinal protrusion on the outside of the rear of the body for centering the support 53 - smoothly curved end of the longitudinal protrusion on the outer surface of the rear of the body.

[0091] Figure 6 is a cross-sectional view of the body with the retainer, where:

[0092] 1 – the front part of the body,

[0093] 2 – Conical protrusion on the front of the body

[0094] 3 – Conical hole in the front of the body

[0095] 6 – Holes in the front of the body for the delivery system and catheter transducer

[0096] 14 – The rear of the body

[0097] 22 – Conical protrusion at the rear of the body

[0098] 23 – tapered hole at the rear of the body

[0099] 24 – Slide

[0100] 28 – Retainer

[0101] 29-Retainer thickening

[0102] 40 – Cap

[0103] 46 - tapered protrusion of the transverse wall at the end of the guide

[0104] 47 - tapered hole in the transverse wall at the end of the guide

[0105] 48 – longitudinal grooves in the inner smooth rear part of the body

[0106] 49 – longitudinal protrusion on the inner smooth rear part of the body

[0107] 50 – protrusion along the circumference of the rear half of the body joined by the ring,

[0108] 55 – Conical protrusion with thickened wall at the front of the body

[0109] 56 – Conical hole with thickened wall at the front of the body.

[0110] Figure 7 is a cross-sectional view of a body with offset threads, where:

[0111] 20 – Internal double-start thread at the rear of the body for engagement with the slideway

[0112] 21 - through hole in the end face of the body for coronary stent delivery system and catheter transducer

[0113] 24 – Slide

[0114] 25 - through hole in the slide for coronary stent delivery system and catheter transducer 26 - slide protrusion which engages with the thread on the inner surface of the rear of the body

[0115] 28 – Retainer

[0116] 29 – Retainer thickening

[0117] 31 – Support

[0118] 34 – Ring for fixing the rear part of the body

[0119] 35 – groove along the inner circumference of the ring to engage the rear half of the body 40 – cap

[0120] 43 —Wall of the tapered hole of the front part of the body, which wall is rounded on the inside 45 —Transverse wall at the end of the guide of the front part of the body.

[0121] Figure 8 is a cross-sectional view of a body with supports, where:

[0122] 1 – the front part of the body,

[0123] 13 – Slide guide

[0124] 14 – The rear of the body

[0125] 15 – Protrusion for fixing the support

[0126] 16 – Chamfer of the rear face of the body

[0127] 20 – Internal double-start thread at the rear of the body for engagement with the slideway

[0128] 24 – Slide

[0129] 25 – hole in the slide for the delivery system or catheter transducer

[0130] 27-Protrusion of the guide piece at the front of the main body

[0131] 28 – Retainer

[0132] 31 – Cylindrical support

[0133] 34 – Ring for fixing the rear part of the body

[0134] 35 – groove along the inner circumference of the ring to engage the rear half of the body, 37 – hole in the slide for the delivery system and catheter transducer

[0135] 38 – End face of the rear part of the main body

[0136] 40 – Cap

[0137] 41 - thickened wall of the front of the body in the area between the retainer lug openings 42 - hole in the rear of the body for the delivery system and catheter transducer 43 - wall of the tapered hole in the front of the body, which is rounded on the inside.

[0138] Fig. 9 is a general view of the front of the body joined to the rear of the body, wherein: 1 – the front of the body

[0139] 10 – Dot-shaped protrusions for retainer lugs

[0140] 14 – The rear of the body

[0141] 28 – Retainer

[0142] 34 - ring for fixing the rear part of the body 41 - thickened wall of the front part of the body in the area between the retainer lug openings 51 - trapezoidal protrusion of the half part of the rear part of the body fixed by the ring 54 - flat wall of the dot-shaped protrusion in the square opening of the retainer lug.

[0143] Fig.10 is an exploded general view of the device, in which:

[0144] 1 – the front part of the body,

[0145] 7 – the cylindrical part of the front part of the body,

[0146] 8 – Retainer lug opening in front cylindrical portion of body

[0147] 9 – The smooth cylindrical part at the front of the body

[0148] 11 – Cylindrical groove in the smooth cylindrical portion of the front of the body

[0149] 12 – cylindrical groove dot element on the front of the body

[0150] 13 – Slide guide

[0151] 14 – The rear of the body

[0152] 17 – Dot-shaped element on the inner smooth rear part of the body

[0153] 18 – Cylindrical protrusions

[0154] 19 – Cylindrical protrusions with dot elements

[0155] 20 – Internal double-start thread at the rear of the body

[0156] 24 – Slide

[0157] 26 - slideway guide threadedly engaged with the inner surface of the rear of the body 27 - protrusion of the guide at the front of the body

[0158] 28 – Retainer

[0159] 29 – Retainer thickening

[0160] 30 – Retainer lug

[0161] 31 – Support

[0162] 33 – Inner longitudinal protrusion on the support

[0163] 34 – Ring for fixing the rear part of the body

[0164] 35 – groove along the inner circumference of the ring to engage the rear half of the body

[0165] 36 – Trapezoidal groove for fixing the ring at the rear of the body

[0166] 38 – End face of the rear part of the main body

[0167] 44 - longitudinal wall for engaging the guide of the front part of the body

[0168] 45 - transverse wall at the end of the guide at the front of the body

[0169] 48 – longitudinal grooves in the inner smooth rear part of the body

[0170] 49 – longitudinal protrusion on the inner smooth rear part of the body

[0171] 50 – protrusion along the circumference of the rear half of the body joined by the ring,

[0172] 51 – Trapezoidal protrusion of the rear half of the body secured by a ring

[0173] 52 - longitudinal protrusion on the outside of the rear of the body for centering the support

[0174] 53 —Smoothly curved end of a longitudinal protrusion on the outer surface of the rear portion of the body. DETAILED DESCRIPTION

[0175] The present invention will now be described in more detail with reference to specific embodiments of the invention in conjunction with the accompanying drawings.

[0176] The main body of the device consists of two components, one of which is basically composed of the following parts: a front truncated head portion 4 ( Figure 1 , Figure 2 ), the cylindrical portion 7 located on the opposite side thereof ( Figure 1 , Fig.10 ), a smooth cylindrical portion 9 of smaller diameter ( Fig.10 )、Guide 13( Figure 8 , Fig.10 ) and also includes a front portion 1 of the main body ( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ), guide for chamfer 37( Figure 8 ) of slide 24( Figure 6 , Figure 7 , Figure 8 , Fig.10 ), chamfered with a through hole 21 for a delivery system or catheter transducer ( Figure 4 , Figure 7 ); another member comprises: a smooth cylindrical portion 9 (arranged in the first member Fig.10 ) parts with internal double-start thread 20( Figure 7 , Figure 8 , Fig.10 ) and end face 38 ( Figure 8 ) on the chamfer 16( Figure 8 ) of the rear part, the chamfer having a through hole 21 ( Figure 4 , Figure 7 ), the second member includes a rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ).

[0177] The front part of the main body is the front 4 ( Figure 1 , Figure 2 ), which is truncated on one side and terminated on the opposite side with a cylindrical portion 7 ( Figure 1 , Fig.10 ), a smooth cylindrical portion 9 of smaller diameter ( Fig.10 ) and for slideway 24 ( Figure 6 , Figure 7 , Figure 8 , Fig.10 ) of the guide member 13 ( Figure 8 , Fig.10 ) are continuously extended in the form of longitudinal walls 44 ( Figure 8 , Fig.10 ) are interconnected, and a transverse wall 45 ( Figure 7 , Fig.10 ), the transverse wall having a tapered hole 46 ( Figure 6 ) and matching conical protrusion 47 ( Figure 6 ) to join the body halves.

[0178] The front truncated part 4 of the main body Figure 1 , Figure 2 ) is suitable for being held by the fingers of the surgeon's left hand and is provided with a groove 5 ( Figure 1 , Figure 2 , Figure 3 ) to allow the surgeon to secure the device in the desired position, groove 5 ( Figure 1 , Figure 2 , Figure 3 ) is also used as a cushion for fixing the coronary artery catheter. In order to more conveniently arrange the coronary stent delivery system or catheter transducer, the front truncated head portion 4 ( Figure 1 , Figure 2 ) in wall 43( Figure 7 , Figure 8 ) in the groove 5 for the operator's left hand finger ( Figure 1 , Figure 2 , Figure 3 ) is rounded on the opposite inner side, said wall contacting the opening of the hole 6 in which the conveying system is installed.

[0179] For retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) lug 30( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.10 ) square opening 8( Fig.10 ) is set in the main body 1 ( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) on both sides of the front cylindrical portion, and in the area between the holes, near the front truncated portion 4 ( Figure 1 , Figure 2 )'s main body 1( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) has a thickened portion 41 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 ). In each square opening 8 ( Fig.10 ), two dot-like protrusions 10 ( Figure 2 , Figure 4 , Fig. 9 ) to be equal to the retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) lug 30( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.10 ) is located on one side, the protrusion is designed to hold the retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) lug 30( Figure 1 , Figure 2 , Figure 3 , Figure 4, Fig.10 ) is in the extreme position, and the retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) is properly in the closed position, each projection has a flat wall 54 ( Fig. 9 ), the flat wall and the protrusion 10 ( Figure 2 , Figure 4 , Fig. 9 ) is at a certain angle, and the retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) lug 30( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.10 ) slides along the flat wall as it changes position, whereby force is exerted by the operator's hand to rotate the retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) lug 30( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.10 ) to reduce the force of closing the mechanism.

[0180] The front smooth cylindrical portion 9 of the main body ( Fig.10 ) having a ring 34 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ).

[0181] Ring 34( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) has a groove 35 formed along its entire inner circumference ( Figure 7 , Figure 8 , Fig.10 ), and the groove is designed to be in the retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) on the side receiving the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) of the half-component circumferentially positioned mating protrusion 50 ( Figure 5 , Figure 6 , Fig.10 ) in order to join the half parts.

[0182] In ring 34 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) is provided on the outer circumference of Figure 4 , Fig.10 ) to receive the rear portion 14 of the main body ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) of the front end of the matching protrusion 51 ( Figure 1 , Figure 3 , Figure 4 , Fig. 9 , Fig.10 ), the protrusion has a trapezoidal shape and is designed to move the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) is fixed to the ring 34 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) to prevent it from rotating spontaneously.

[0183] With point element 12 ( Fig.10 ) of the cylindrical groove 11 ( Fig.10 ) along the front portion 9 of the main body ( Fig.10 ) of the end surface of the smooth cylindrical portion of the slideway 24 ( Figure 6 , Figure 7 , Figure 8 , Fig.10 ) of the guide member 13 ( Figure 8 , Fig.10 ) is arranged on the side, the cylindrical groove is designed to be used for connecting with a point element 19 ( Fig.10 ) of the matching protrusion 18 ( Fig.10 ) are joined, the dot-shaped elements being arranged along the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) with double-start thread 20 ( Figure 7 , Figure 8 , Fig.10 ) is formed on the side of the surface.

[0184] The rear cylindrical portion 14 of the main body ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) has a longitudinal protrusion 49 ( Figure 6 , Fig. 9 ) and matching longitudinal groove 48 ( Figure 6 , Fig. 9 ), said matching longitudinal groove being located on the inside of the half-part along the edge in the smooth cylindrical surface area and for engaging the rear part 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) half part.

[0185] Arranged along the circumference of the retainer side at the rear portion 14 of the body ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) on the inner smooth cylindrical surface of the dot element 17 ( Fig.10 ) is designed to reduce friction between the rotatable parts of the body.

[0186] With point element 19 ( Fig.10 ) of the cylindrical protrusion 18 ( Fig.10 ) along the rear portion 14 of the main body ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) with smooth inner surface and internal double-start thread 20 ( Figure 7 , Figure 8 , Fig.10 ) is arranged on the circumference between the surfaces of the slideway 24 ( Figure 6 , Figure 7 , Figure 8 , Fig.10 ) of the guide member 13 ( Figure 8 , Fig.10 ) side engages the main body front part 9 ( Fig.10 ) of a cylindrical groove 11 ( Fig.10 ), so that the rear cylindrical portion 14 of the body ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) is capable of rotating about its axis.

[0187] At the rear of the main body 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) is formed on the outer surface of the longitudinal protrusion 52 ( Figure 5 , Fig.10 ), whose end 53 ( Figure 5 , Fig.10 ) is smoothly bent in the opposite direction so as to fit in the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) on the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) and prevent the support from rotating spontaneously. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) is at the circumference of the end face of hole 32 ( Figure 3 , Figure 4 ) in which the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 )Fixed protrusion 15( Figure 3 , Figure 4 , Figure 5 , Figure 8 ) is located at the rear of the main body 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) end face 38( Figure 8 )superior.

[0188] Support member 31( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8, Fig.10 )Inside double thread 20( Figure 7 , Figure 8 , Fig.10 ) is mounted in the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 )superior.

[0189] Support member 31( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) is essentially a hollow cylinder with an inner longitudinal guide 33 along its entire length to ensure contact with the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) is tightly fitted on the outer surface of the rear portion of the body, matching the longitudinal protrusion 52 ( Figure 5 , Fig.10 ) is set with ( Figure 5 , Fig.10 ) The end 53 is smoothly bent in the opposite direction, and the protrusion is used to firmly connect the support member ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ).

[0190] Along the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) is formed on the circumference of the end face of the hole 32 ( Figure 2 , Figure 4 ) is used to extend along the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) end face 38( Figure 8 ) of the circumference of the matching protrusion 15 ( Figure 3 , Figure 4 , Figure 5 , Figure 8 ) with the help of the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) is fixed to the rear of the main body 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) on the surface.

[0191] On the front of the main body 1( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ), the rear part 14 of the main body ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) end surface 38, slideway 24 ( Figure 6 , Figure 7 , Figure 8 , Fig.10 )、Cap 40( Figure 6 , Figure 7 , Figure 8 , Fig.10 ) and elastic sleeve 39 ( Fig.10 ) is made into a through hole 6 ( Figure 6 )、through hole 21( Figure 4 , Figure 7 ) and through hole 25( Figure 7 , Figure 8 ) to introduce a coronary stent delivery system or traction catheter transducer into a device mounted within the subject.

[0192] In order to make the center through hole 6 ( Figure 6 )、Center hole 21( Figure 4 , Figure 7) and center hole 25( Figure 7 , Figure 8 ) to easily position the coronary stent on the delivery system or catheter transducer within the device, at the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) end face 38( Figure 8 ) is formed with a hole 21 ( Figure 7 ) of chamfer 42( Figure 8 ), and with hole 25 ( Figure 7 ) chamfer 37( Figure 8 ) is made in slideway 24 ( Figure 6 , Figure 7 , Figure 8 , Fig.10 ) on the end surface.

[0193] The main body comprises a front part 1 ( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) and rear 14( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ), and consists of two identical halves that are joined after the mechanism is assembled.

[0194] The front of the main body is provided by means of a Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) is formed into a conical protrusion 2 ( Figure 6 )、conical protrusion 55( Figure 6 ) and matching tapered hole 3 ( Figure 6 ), matching tapered hole 56 ( Figure 6 ) to assemble, making the maximum possible number of 1 ( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8, Fig. 9 , Fig.10 ) of the conical protrusion 22 ( Figure 6 ) on the conical protrusion 3 ( Figure 6 ) and matching tapered hole 2 ( Figure 6 ), in the retainer 28 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) lug 30( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.10 ) in the region between the conical protrusions 55 ( Figure 6 ) and matching tapered hole 56 ( Figure 6 ), and at the front of the main body 1 ( Figure 6 ) of slide 24( Figure 6 , Figure 7 , Figure 8 , Fig.10 ) of the guide member 13 ( Figure 8 ) at the end of the transverse wall ( Figure 7 , Fig.10 ) on the conical protrusion 46 ( Figure 6 ) and matching tapered hole 47 ( Figure 6 ), thereby making the bonding reliability higher.

[0195] In the front half of the main body 1 ( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) is engaged, ring 34 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) is mounted on the smooth cylindrical portion 9 at the front of the main body ( Fig.10 ) on slide 24( Figure 6 , Figure 7 , Figure 8 , Fig.10 ) of the guide member 13 ( Figure 8 ) side, the ring has a groove 35 ( Figure 7 , Figure 8 , Fig.10 ), the rear part 14 of the main body ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) of the semicircular mating protrusion 50 ( Figure 6 , Fig.10 ) is inserted into the groove, and in the ring 34 ( Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) is formed on the outer circumference of the trapezoidal groove 36 ( Fig.10 ), the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) of the semicircle of the front half of the matching trapezoidal protrusion 51 ( Figure 1 , Figure 3 , Figure 4 , Figure 5 , Fig. 9 , Fig.10 ) is inserted, and the half parts are joined so that the front part 9 ( Fig.10 ) is received in the rear smooth cylindrical portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) half, wherein the rear portion 14 ( Fig.10 ) and having an inner smooth portion and an inner double-start thread 20 ( Fig.10 ) between the cylindrical protrusions 18 ( Fig.10 ) and point elements 19 ( Fig.10 ) on the side of the slide guide using the front part 9 of the main body ( Fig.10 ) of the smooth cylindrical portion of the point element 12 ( Fig.10 ) is inserted into the cylindrical groove 11 ( Fig.10 ) and the half-part is connected by means of the rear part 14 ( Figure 1 , Figure 2, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) is made into a conical protrusion 22 ( Figure 6 ) and matching tapered hole 23 ( Figure 6 ), and by means of a longitudinal groove 48 ( Figure 6 , Fig.10 ) and longitudinal protrusion 49( Figure 6 , Fig.10 ), joined in the same manner as the front portion of the main body, thereby joining the front portion 1 ( Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) form an overlapping joint, so that the cylindrical support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 )Inside double thread 20( Figure 7 , Figure 8 , Fig.10 ) in the region of the end face 38 ( Figure 8 ) side and slide over the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) until the support is fixed to the rear cylindrical portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) so that the inner longitudinal guide 33 ( Fig.10 ) The outer longitudinal protrusion 52 ( Figure 5 , Fig.10 ), the end portion 53 ( Figure 5 , Fig.10 ) bends smoothly in opposite directions.

[0196] Embodiment 2 of the present invention

[0197] According to this embodiment of the invention, the rear portion 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ) can be smooth, without outer longitudinal protrusions 52 ( Figure 5 , Fig.10 ), the end 53 of the outer longitudinal protrusion ( Figure 5 , Fig.10 ) is smoothly curved, but at the support 31 ( Fig.10 ) has an inner longitudinal protrusion 33 ( Fig.10 ); In this case, the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) is fixed to the rear of the main body 14 due to the surface friction of the components and the force provided by the deformation of the support member ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 ). In this case, the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) should have a shape that allows the support to fit tightly to the rear of the body 14 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 ) on the diameter.

[0198] Embodiment 3 of the present invention

[0199] According to this embodiment of the invention, the rear end face 38 ( Figure 8 ) may not have protrusions 15 along the circumference ( Figure 3 , Figure 8 ) to fix the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ), and the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 ) may not have matching hole 32 ( Figure 2 , Figure 4 ) to receive the protrusion 15 ( Figure 3 , Figure 8 ), and in this case, since the support member 31 ( Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 )'s deformation provides friction and a tight fit, fixing one part relative to another.

Claims

1. A body of a device, the body being suitable for positioning a coronary stent in a coronary artery or pulling a catheter transducer for intravascular ultrasound, the body comprising: A holder with lugs, a slideway with an opening to accommodate a delivery system therein, and a chamfered rear portion, the slideway being provided with a protrusion for engaging the internal thread of the rear cylindrical portion of the body and a protrusion for moving along a guide in the body on one side, and being provided with a threaded cap with a hole, the threaded cap having an elastic sleeve with a tapered inner hole and an end surface that coincides with the surface of the inner side of the threaded cap and the surface of the inner side of the slideway, the elastic sleeve being positioned in the threaded cap to be screwed onto the slideway on opposite sides, wherein the body is composed of a front portion and a rear portion made of two half parts; the front portion of the body being truncated on one side thereof and having a cylindrical portion, a smooth round portion of smaller diameter on its opposite side. The form of a cylindrical part and a slide guide extends continuously, the cylindrical part has an opening for a lug of a holder, with a dot-shaped protrusion in each opening, the guide has a cylindrical groove, the cylindrical groove has a dot-shaped element in front of the guide, and the rear part of the body is made cylindrical and has an inner smooth surface, has dot-shaped elements along its circumference and a surface with double-start threads along its circumference, wherein a cylindrical protrusion with dot-shaped elements is provided between the smooth inner surface and the surface with double-start threads along its circumference, the end face of the rear part has a chamfer, and through holes are made in the end faces of the front and rear parts to introduce a delivery system for a coronary stent or a catheter transducer for intravascular ultrasound into the interior of the device, Characterized in that the main body comprises: The front part of the body, including: a rounded wall on the inside of the truncated front portion of the body, opposite the recess for the operator's left hand finger, in a position where the wall abuts the mouth of the input aperture to accommodate a delivery system or catheter transducer, Thickened wall in the area between the openings of the lugs of the retainer at the front of the body, a flat wall which is positioned at an angle to the point-like protrusion in the opening for the lug of the retainer, a ring rotatably mounted on the smooth cylindrical surface of the front portion of the body, the ring having a ring groove in which the protrusion of the rear half of the body is circumferentially positioned to engage the rear half of the body, and the trapezoidal protrusion of the rear half of the body is positioned in the trapezoidal groove to fix the rear half of the body, The longitudinal walls of the connecting slideway guide and the adjoining transverse walls at the ends of the guide are provided with conical protrusions and matching conical holes, as well as chamfered slideways near the central hole, The rear part of the main body includes: a longitudinal projection and a matching groove along the edge of the inner smooth portion of the rear half of the body to engage the rear half of the body, The longitudinal projections have ends that are bent in opposite directions on the outer surface of the body in an area with an internal double-start thread to engage the longitudinal projections along the circumference of the inner surface of the support, The support has the form of a hollow cylinder and is provided with: a longitudinal protrusion along the circumference of the inner surface to engage with a longitudinal protrusion with ends bent in opposite directions and positioned on the outer surface in the area having the internal double-start thread at the rear of the body, The holes in the end face are used to connect to the end face of the rear of the body, and are used to connect to the protrusions along the circumference of the end face of the rear of the body to hold the support.

2. The main body of the device according to claim 1, characterized in that The outer surface of the rear portion of the body is smooth, and there are no longitudinal protrusions on the outer surface that are smoothly curved in opposite directions.

3. The main body of the device according to claim 1, characterized in that The end face of the cylindrical support has no holes along its circumference, while the end face of the rear portion of the body has no matching protrusions along its circumference.

Images