JP2016190011A - Optical connector for medical appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical connector for a medical appliance, which is easily attachable/detachable, easily handleable to medical personnel, and surely connectable to another optical fiber.SOLUTION: An optical connector for a medical appliance has a connector body 104 for holding an end ferrule connected to a proximal end of a cable having a built-in optical fiber, a cover member 106 for holding a distal end of the connector body 104 so as to enclose it, and a strain relief 94 connected to a distal end of the cover member 106 and enclosing an outer periphery of the cable 90.SELECTED DRAWING: Figure 10B

Description

  The present invention relates to an optical connector for a medical instrument, and more specifically, for example, an optical fiber connected to an optical pressure sensor or the like built in the medical instrument for the purpose of measuring blood pressure or the like is connected to an external control device or the like. The present invention relates to an optical connector for a medical instrument.

  In recent years, in the medical field, catheters are frequently used for various treatments and examinations. For example, an intra-aortic balloon pumping method (IABP method) is performed as a treatment for lowering cardiac function, in which a balloon catheter is inserted into the aorta and the balloon is inflated and deflated according to the heart beat to assist the cardiac function. It has been broken.

  As an intra-aortic balloon catheter used in this IABP method, a catheter having a double tube structure formed by an outer tube and an inner tube located inside the outer tube is generally used.

  In such a double-tube catheter, blood is taken in from the distal end opening of the inner tube, and a blood pressure measurement device is attached to the proximal end opening to detect fluctuations in blood pressure. However, in recent years, the outer diameter of the catheter is reduced from the viewpoint of reducing the load on the patient, and therefore, the inner diameter of the inner tube constituting the blood pressure introduction hole is also reduced, making accurate blood pressure measurement difficult. If the blood pressure cannot be measured accurately in a timely manner, there is a possibility that treatment such as the IABP method cannot be performed satisfactorily.

  Therefore, a catheter has been proposed in which a pressure sensor (electrical signal conversion method) is attached to the distal end of the catheter, and the blood pressure at the distal end of the catheter is detected as an electrical signal (for example, Patent Document 1).

  However, in the method in which the pressure signal is taken out through the catheter as an electrical signal, electrical noise may occur. In addition, there is a problem that drift correction of the pressure sensor is necessary due to a change in conductivity of the medium surrounding the pressure sensor.

  Therefore, for example, as shown in Patent Document 2, attempts have been made to use an optical pressure sensor for a catheter. However, when an optical pressure sensor is used as a sensor, it is necessary to connect an optical fiber cable to an external device such as a medical instrument control device or a monitoring device using an optical connector.

  Conventionally, for example, as shown in Patent Document 3, a general-purpose push-pull optical connector such as an SC connector (SC type optical connector) widely used outside the medical field is used as an optical connector. However, general-purpose optical connectors are often designed for optical wiring engineers, and there are only a limited number of parts that must be gripped for reliable connections. It was not easy. In the medical field, if an optical connector is not securely connected to an external device such as a medical instrument control device or a monitoring device, there is a possibility that appropriate treatment or diagnosis cannot be performed.

JP 10-137199 A Special table 2008-524606 JP 2012-501807 A

  The present invention has been made in view of such a situation, and an object thereof is to provide an optical connector for a medical instrument that is easy to use for medical personnel, reliably connects optical fibers, and is easy to attach and detach. .

In order to achieve the above object, an optical connector for a medical instrument according to the present invention comprises:
A connector body holding an end ferrule connected to the proximal end of the cable containing the optical fiber;
A cover member held around the distal end of the connector body;
A stress relieving member connected to the distal end of the cover member and surrounding the outer periphery of the cable.

  In the optical connector for medical instruments according to the present invention, the cover body is held by the connector main body. As the connector body, for example, a general-purpose push-pull optical connector can be used. Since the cover member is larger than the connector body, even medical personnel can easily hold it. Moreover, in the optical connector for medical instruments of this invention, the stress relaxation member (strain relief) is connected with the cover member. Therefore, even when a medical person grasps the stress relaxation member and tries to connect the optical connector for a medical instrument to an external device, the force to be connected is transmitted to the connector main body through the cover member, The end ferrule of the connector body can be securely connected to the end ferrule of the external device.

  In addition, when the conventional general-purpose push-pull optical connector is used as it is, if the stress relaxation member that protects the optical fiber cable is gripped and the end ferrule of the connector body is connected to the end ferrule of the external device, these The connection was likely to be incomplete. This is because in general-purpose push-pull optical connectors, when connecting, the sliding sleeve on the outer side of the connector body is gripped to connect to the ferrule casing on the inner side of the connector body so that the connection is not disconnected even if the cable is pulled. On the other hand, it is necessary to push the sliding sleeve, and the stress relief member is attached to the ferrule casing or the optical fiber cable, not the sliding sleeve. This is because the sliding sleeve is not pushed into the ferrule casing.

Preferably, the cover member is
A first inward protrusion that engages with a stress relief groove formed at a proximal end of the stress relief member;
A second inward convex portion that engages with a knob concave portion formed on the outer periphery of the distal end portion of the connector main body.

  By comprising in this way, a connection with a cover member and a connector main body and a connection with a cover member and a stress relaxation member become easy.

  Preferably, the cover member is configured by combining a pair of halves. By comprising in this way, a connection with a cover member and a connector main body and a connection with a cover member and a stress relaxation member become easy.

  Preferably, a main portion of the stress relaxation member is exposed from a distal end portion of the cover member and covers the periphery of the cable. By comprising in this way, the optical fiber in the cable near the cover member which is especially easy to receive damage can be reliably protected.

Preferably, a connector-side electrical connection terminal is attached to the proximal end of the connector body,
The connector-side electrical connection terminal can be detachably connected to the equipment-side electrical connection terminal, and the equipment-side electrical connection terminal is attached to the equipment-side connection portion together with the receiving-side ferrule, The receiving ferrule is detachably connectable to the end ferrule of the connector body.

  By configuring in this way, the connection between the end ferrule and the receiving ferrule is made only by connecting the proximal end portion of the connector main body to the device side connection portion, and at the same time, the connector side electrical connection terminal and Connection to the device-side electrical connection terminal is made.

Preferably, a memory element connected to the connector-side electrical connection terminal is mounted inside the cover member,
The memory element stores data relating to a medical device to which a distal end of the optical fiber is connected;
The data can be read through the connector-side electrical connection terminal.

  With this configuration, the device-side connection unit can receive optical data through the optical fiber and the ferrule, and can receive data related to the medical device through the connector-side electrical connection terminal. Therefore, the data regarding the medical device is accurately transmitted to the device side, and the medical device can be controlled based on the accurate data.

  The connector body may be an SC type optical connector.

FIG. 1 is an overall perspective view of a stylet in which an optical connector for a medical instrument according to an embodiment of the present invention is used. 2 is an enlarged perspective view of a distal end portion of the medical stylet shown in FIG. FIG. 3 is a cross-sectional view of the main part near the optical pressure sensor at the distal end of the medical stylet shown in FIG. FIG. 4 is a cross-sectional view of an essential part in which the vicinity of the optical pressure sensor shown in FIG. 3 is further enlarged. FIG. 5 is a cross-sectional view of a main part of the front connector shown in FIG. 6 is an enlarged cross-sectional view of a main part of the front connector shown in FIG. FIG. 7 is a perspective view of a main part showing details of a joint portion of the pair of ferrules shown in FIG. FIG. 8 is a sectional view of a balloon catheter showing an example of use of the medical stylet shown in FIG. FIG. 9 is an enlarged cross-sectional view of a main part of the distal end portion of the balloon catheter shown in FIG. FIG. 10A is a bottom view of the optical connector for medical instruments shown in FIG. FIG. 10B is a bottom view showing a state where one half of the optical connector for medical instruments shown in FIG. 1 is removed. FIG. 11 is a cross-sectional view of a principal part taken along line XI-XI of the optical connector for medical instruments shown in FIG. 10A. FIG. 12 is a perspective view of a principal part showing a state before the optical connector for medical instruments shown in FIG. 10A is connected to an external device.

  A medical stylet 60 having a back connector 100 as an optical connector for a medical instrument according to an embodiment of the present invention shown in FIG. 1 is used together with, for example, the balloon catheter 20 shown in FIG. First, the balloon catheter 20 shown in FIG. 8 will be described.

  A balloon catheter 20 shown in FIG. 8 is a balloon catheter used for an intra-aortic balloon pumping method, and has a balloon portion 22 that expands and contracts in accordance with the pulsation of the heart. The balloon part 22 is comprised with the thin film about 50-150 micrometers in film thickness. The material of the thin film is not particularly limited, but is preferably a material excellent in antithrombogenicity and resistance to bending fatigue, and is made of, for example, polyurethane.

  The outer diameter and length of the balloon portion 22 are determined according to the inner volume of the balloon portion 22 that greatly influences the assisting effect on the cardiac function, the inner diameter of the arterial blood vessel, and the like. The internal volume of the balloon part 22 is not particularly limited, but is 20 to 50 cc. The outer diameter of the balloon part 22 is preferably 12 to 18 mm at the time of inflation, and the length is preferably 150 to 250 mm.

  A distal end tip portion 25 in which a distal end opening 23 is formed is attached to the distal end portion 22a of the balloon portion 22 by means such as heat fusion or adhesion. A distal end portion of the inner tube 30 is attached to the inner peripheral side of the distal end tip portion 25 by means such as heat fusion or adhesion.

  A distal end portion of the outer tube 24 is connected to the proximal end portion 22 b of the balloon portion 22. The pressure fluid is introduced and led out into the balloon portion 22 through the pressure fluid passage 29 formed in the outer tube 24, and the balloon portion 22 is inflated and deflated. The connection between the balloon portion 22 and the outer tube 24 is performed by heat fusion or bonding with an adhesive.

  The inner tube 30 extends in the axial direction inside the balloon portion 22 and the outer tube 24, and communicates with a wire insertion port 44 of the handle portion 42 described later. A lumen 31 that does not communicate with the pressure fluid communication path 29 formed in the inner and outer pipes 24 is formed.

  When the balloon catheter 20 is inserted into the artery, the inner tube 30 positioned in the balloon portion 22 is wound around the balloon portion 22 in a deflated state, and the lumen 31 conveniently inserts the balloon portion 22 into the artery. It is also used as a lumen for inserting a guide wire used for the purpose.

  A handle portion 42 installed outside the patient's body is connected to the proximal end portion of the outer tube 24. The handle portion 42 is molded separately from the outer tube 24 and is fixed by means such as heat fusion or adhesion. The handle portion 42 includes a first fluid passage 47 in which a pressure fluid introduction passage 46 for introducing or deriving a pressure fluid into the balloon portion 22 and a pressure fluid communication path 29 in the outer tube 24 and an inner tube 30 are formed. And a second passage 45 in which a wire insertion port 44 communicating with the second passage 45 is formed.

  The pressure fluid introduction outlet 46 is connected to, for example, a pressure fluid connector tube of a driving device (not shown), and fluid pressure is introduced into or led out from the balloon portion by this driving device. The fluid to be introduced is not particularly limited, but helium gas having a low viscosity or the like is used so that the balloon portion can be quickly expanded or contracted according to the driving of the driving device. Further, the driving device (IABP driving device) is not particularly limited, and for example, a device as shown in Japanese Patent Publication No. 2-39265 and WO 2011/114779 is used.

  In the handle portion 42 of the present embodiment, the first passage 47 in which the pressure fluid introduction outlet 46 is formed is arranged in a straight shape along the axial direction of the outer tube 24, and the second passage in which the wire insertion port 44 is formed. 45 is arranged with a predetermined inclination with respect to the axis of the first passage 47.

  In the handle portion 42 of the present embodiment, the end portion of the inner tube 30 is held in the second passage 45, and the inner tube 30 is arranged eccentrically so as to contact the inner wall of the outer tube 24. A first inner tube end holder 48 and a second inner tube end holder 50 are mounted. Since the first passage 47 communicating with the pressure fluid introduction outlet 46 formed in the handle portion 42 is arranged in a straight shape along the axial direction of the outer tube 24, the wire insertion port extends in the axial direction of the outer tube. Compared to the case where the pressure fluid is arranged along the straight line, the flow resistance of the pressure fluid can be reduced, and the response of expansion / contraction in the balloon portion is improved.

  FIG. 1 shows the mounting port 52 of the second inner tube end holder 50 in which the wire insertion port 44 is formed (port for inserting an insertion wire 80 described later through the second passage 45 and the lumen 31). A port connector 72 of the front connector 70 of the medical stylet 60 shown is detachably mounted. The insertion wire 80 of the medical stylet 60 can be inserted into the lumen 31 of the inner tube 30. In addition, the method of attaching the port connection part 72 to the attachment port 52 in a detachable manner may be in accordance with a conventional method. For example, means such as screwing may be employed.

  Hereinafter, the medical stylet 60 will be described in detail. As shown in FIG. 1, the medical stylet 60 includes an insertion wire 80 and a connector 65 to which a proximal end portion of the insertion wire 80 is attached.

  As shown in FIGS. 2 and 3, the insertion wire 80 has a hollow wire 82 and a distal end wire 81 inserted and attached to the distal end of the hollow wire 82. The distal end wire 81 is tapered toward the distal end, and a spherical body 81a having a diameter larger than the outer diameter of the wire 81 near the distal end is integrally formed at the most distal end. Molded. By providing the spherical body 81a at the distal end of the wire 81, the distal end of the insertion wire 80 can be easily inserted into the lumen 31 of the inner tube 30 shown in FIG. The risk of damaging the inner tube 30 at the portion is reduced.

  The outer diameter of the spherical body 81 a is preferably about the same as or smaller than the largest outer diameter of the tapered wire 81, and is preferably smaller than the outer diameter of the hollow wire 82. The length L0 of the distal end wire 81 (the length of the portion protruding from the hollow wire 82) L0 is not particularly limited, but is preferably 5 to 50 mm. Although the outer diameter of the hollow wire 82 is not specifically limited, For example, it is 0.3-0.7 mm. The inner diameter of the hollow wire 82 may be an inner diameter into which the optical pressure sensor 84 and the optical fiber 88 can be inserted. The total length of the insertion wire 80 is not particularly limited, but is preferably 50 to 800 mm.

  As shown in FIG. 3, the proximal end portion 81 b of the distal end wire 81 is joined to the inside of the attachment distal end portion 82 a of the hollow wire 82. These joinings may be laser welding, other welding, joining by an adhesive, or the like. Near the attachment distal end portion 82a of the hollow wire 82, at least one, preferably a pair or a plurality of openings 82b are provided, and the inside and the outside of the hollow wire 82 can communicate with each other through the openings 82b. It has become.

  In the present embodiment, the proximal end portion of the distal end wire 81 reaches the proximal end side edge portion of the opening portion 82b and protrudes slightly to the opening portion 82b, but does not necessarily reach the opening portion 82b. Also good. However, the proximal end portion of the distal end wire 81 does not completely block the opening portion 82b, and preferably the hollow wire 82 is attached so as not to reduce the opening area of the opening portion 82b. It is joined to the inside of the distal end portion 82a.

  An optical pressure sensor 84 for detecting the pressure of the fluid entering from the opening 82b is attached to the inside of the hollow wire 82 at the edge on the proximal end side of the opening 82b. The distal end of the optical fiber 88 is joined to the proximal end of the optical pressure sensor 84. As shown in FIG. 4, the distal end 88a of the optical fiber 88 enters into a recess 84b formed on the proximal end side of the substrate body 84a of the optical pressure sensor 84, and the substrate body 84a is bonded by an adhesive 87 or the like. Is joined.

  The substrate body 84a is made of, for example, glass. A diaphragm 85 is attached to the tip (distal end) of the substrate body 84a, and a cavity 86 is formed behind the diaphragm 85 so as to form a light resonance portion. is there. By applying pressure to the diaphragm 85, the path difference of light transmitted through the optical fiber 88 changes, and the pressure applied to the diaphragm 85 can be detected. The optical pressure sensor 84 is not particularly limited, and those described in, for example, JP-T 2008-524606, JP-A 2000-35369, JP-A 2014-507666, and the like can be used.

  In this embodiment, the diaphragm 85 which is a pressure detection part of the pressure detection sensor 84 is located at the proximal end edge of the opening 82b of the hollow wire 82, and accurately measures the blood pressure of blood transmitted through the opening 82b. It is possible. On the outer periphery of the optical fiber 88 connected to the proximal end of the optical pressure sensor 84, a coating layer 88b is formed of, for example, polyimide resin.

  The vicinity of the distal end of the optical fiber 88 located near the optical pressure sensor 84 is fixed inside the hollow wire 82 by the partition ring 83. In order to fix the partition ring 83 at a predetermined position inside the hollow wire 82, one or more bonding holes 82c are formed at predetermined positions from the opening 82b of the hollow wire 82, as shown in FIGS. It is. By injecting an adhesive through the bonding hole 82c, it becomes easy to fix the partition ring 83 in a predetermined position from the opening 82b to the proximal end side inside the hollow wire 82. The positioning with the pressure sensor 84 can be performed simultaneously. The pressure detected by the optical pressure sensor 84 can be transmitted as an optical signal through the optical fiber 88.

  In the present embodiment, the distal end wire 81 and the hollow wire 82 are made of metal such as stainless steel or nickel / titanium alloy, and these may be made of the same material or different materials. You may comprise. As shown in FIG. 4, a coating layer 82 d made of a fluororesin such as PTFE may be applied to the outer periphery of the hollow wire 82.

  As shown in FIG. 1, the connector 65 includes a front connector 70 to which the proximal end of the hollow wire 82 is attached, a back connector (optical connector for a medical instrument of this embodiment) 100, and a cable 90 that connects them. And have. As shown in FIG. 8, the front connector 70 has a port connection portion 72 connected to an attachment port 52 for passing the insertion wire 80 through the lumen 31 of the balloon catheter 20 as a catheter. The port connection portion 72 is formed at the distal end portion of the front connector body 71 of the front connector 70, and the branch port 73 is formed in the front connector body 71. The connection between the front connector 70 and the hollow wire 82 (insertion wire 80) may be a detachable connection or may be fixed so as not to be detachable, but the optical fiber in the front connector 70 and the hollow wire 82 may be fixed. From the viewpoint of reliably maintaining the continuity of 88 for a long period of time, it is preferable that the connection is fixed so as not to be detachable.

  As shown in FIG. 5, a flush nozzle 72 a is attached inside the port connection portion 72 so as to be substantially concentric. The inside of the flash nozzle 72 a communicates with the inside of the branch port 73. Liquids such as physiological saline and anticoagulant solution introduced from the branch port 73 are introduced into the wire insertion port 44 from the tip of the flush nozzle 72a shown in FIG. 8, and inserted through the lumen 31 of the inner tube 30 therefrom. It flows outside the wire 80 and is led to the distal end opening 23 of the inner tube 30.

  As shown in FIG. 5, a connection port 74 is formed at the proximal end of the front connector main body 71, and a ferrule holding portion 75 is connected to the connection port 74. As shown in FIGS. 6 and 7, the ferrule holding part 75 has an optical fiber 88 </ b> A in the cable 90 that is connected to the proximal end of the optical fiber 88 attached to the hollow wire 82 of the insertion wire 80. A pair of ferrules 76 and 77 are connected to each other inside the sleeve 78. Further, a pipe 78a made of a metal such as stainless steel is covered on the outer peripheral side of the pair of ferrules 76 and 77 and the sleeve 78, and the inside of the pipe 78a is an adhesive for sealing an optical component or the like. It is sealed with a sealing material 78b. The optical fiber 88 mounted inside the hollow wire 82 and the optical fiber in the cable 90 are configured as separate optical fibers, and are connected in the front connector main body 71. The cable 90 portion can be manufactured in a separate manufacturing process, and the productivity of the medical stylet 60 is improved. Also, as these optical fibers 88 and 88A, optical fibers having different types and diameters can be used. For example, for the purpose of reducing the diameter of the hollow wire 82, the optical fiber 88 in the hollow wire 82 is used. Alternatively, an expensive optical fiber with a particularly small diameter may be used, and a general-purpose inexpensive optical fiber may be used as the optical fiber 88A in the cable 90. The ferrules 76 and 77 are used to facilitate connecting the ends of the different optical fibers 88 and 88A to each other so that an optical signal can be transmitted to each other. However, the ferrules 76 and 77 are not necessarily used. The ends of 88 and 88A may be directly connected by means such as fusion.

  As shown in FIG. 6, the proximal end of the ferrule 77 to which the distal end portion of the optical fiber 88A is connected is attached to the distal end of the plug member 79, and the proximal end side tubular portion 79a of the plug member 79 is attached. Is connected to the aramid fiber 93 provided for the purpose of supporting and protecting the optical fiber 88A around the optical fiber 88A in the cable 90 by means such as caulking using a caulking ring. Are connected to the distal end 91a of the tube main body 91 constituting the above by means such as caulking using a caulking ring. A pair of ferrules 76 and 77 and a pipe 78a in which a sleeve 78 is sealed are further sealed in the housing cylinder portion 75b of the ferrule holding portion 75, for example, a cured product of an ultraviolet curable adhesive or the like. Filled with 75 g of filling material.

  The proximal end of the ferrule holding portion 75 is provided with a convex portion 75f extending in the circumferential direction of its inner surface, and the presence of the convex portion 75f allows the proximal end side cylindrical portion 79a of the plug member 79 to be provided. The connection part between the cable 90 and the cable 90 is prevented from coming off from the proximal end side of the ferrule holding part 75, and the connection between the ferrule holding part 75 and the cable 90 is ensured. In addition, an insertion tube portion 75c and an outer tube portion 75d located on the outer periphery thereof are formed at the distal end of the ferrule holding portion 75, and a connection port 74 shown in FIG. The front connector main body 71 and the ferrule holding part 75 are connected to each other. The connection between the front connector main body 71 and the ferrule holding part 75 is completed when the optical fibers 88 and 88A are connected in the accommodating cylinder part 75b of the ferrule holding part 75 and the filling material 75g is filled in the accommodating cylinder part 75b. It is desirable to do this after. Further, a means such as screwing or adhesion may be used for connection between the front connector main body 71 and the ferrule holding portion 75. A pair of ferrules 76 and 77 and a sleeve 78 are arranged inside the insertion cylinder part 75c and the accommodation cylinder part 75b of the ferrule holding part 75, but the periphery thereof is filled with the sealing material 78b and the filler 75g. In addition, the liquid flowing in from the branch port 73 does not enter the inside of the insertion cylinder part 75c and the accommodation cylinder part 75b, but from the flush nozzle 72a arranged on the distal end side thereof, the handle part shown in FIG. 42 is discharged into the wire insertion port 44. Therefore, the connection portion of the optical fibers 88 and 88A connected using the pair of ferrules 76 and 77 does not come into contact with the liquid flowing between the port connection portion 72 and the branch port 73. The 88A is secured without being affected by the liquid.

  As shown in FIG. 1, strain reliefs 92 and 94 as stress relaxation members are attached to the outer periphery of both ends of the cable 90. The strain reliefs 92 and 94 are substantially cylindrical members formed of, for example, a thermoplastic elastomer and having an outer diameter that decreases from one end to the other end. A stress relaxation groove 95 is provided along the radial direction. One strain relief 92 is connected to the proximal end of the ferrule holding portion 75 of the front connector 70 with the end having the larger outer diameter as the distal end, and covers the distal end of the cable 90. The other strain relief 94 is connected to the distal end of the cover member 106 of the back connector 100 with the end having the larger outer diameter as the proximal end, and covers the proximal end of the cable 90.

  As shown in FIGS. 5 and 6, an optical fiber 88A is passed through a flexible tube 91 constituting the cable 90, and the proximal end of the optical fiber 88A is connected to the back as shown in FIG. It is connected to the end ferrule 102 of the back connector main body (connector main body) 104 held by the cover member 106 of the connector 100.

  As shown in FIGS. 10A, 10B, and 11, a grip portion 106a having an outer diameter smaller than that of the other portion is formed on the outer periphery on the distal end side of the cover member 106. It is easy to pick with. A proximal end portion 94 a of the strain relief 94 is located inside the grip portion 106 a, and a first inward convex portion 130 formed at the distal end of the cover member 106 is a proximal end portion of the strain relief 94. It is engaged with a stress relaxation groove 95 formed in 94a. The proximal end portion 94a of the strain relief 94 may be fixed inside the cover member 106 with, for example, an adhesive.

  The cover member 106 is formed of, for example, a synthetic resin, and may be flexible so that the operator can easily pick it with a finger, particularly in the grip portion 106a. Further, as shown in FIG. 12, the cover member 106 is configured by combining a pair of halves 106A and 106B. FIG. 10B shows a state in which one half 106B is removed and the other half 106A is viewed from the bottom side, but the other half 106B that has been removed has a similar structure.

  As shown in FIG. 10B, a pair of second inward convex portions 132 are integrally formed inside the proximal end of the cover member 106, and each second inward convex portion 132 is formed on the connector body 104. The distal end 104a of the connector body 104 can be fixed to the inside of the cover member 106 by engaging with a knob recess 124 formed at the distal end 104a of the sliding sleeve 104A. A pair of connector-side electrical connection terminals 110 are attached to the bottom surface of the proximal end of the connector main body 104 (see FIGS. 10A and 10B).

  As shown in FIG. 11, the connector-side electrical connection terminal 110 can be detachably connected to the device-side electrical connection terminal 210. The device-side electrical connection terminal 210 is mounted on the substrate 211 of the device-side connection portion 204 to which the receiving-side ferrule 202 to which the proximal end 102a of the end ferrule 102 of the connector main body 104 is detachably connected is fixed.

  As illustrated in FIG. 12, the device-side connection unit 204 is configured as, for example, a female socket 200. The proximal end of the connector body 104 constitutes a male socket. Therefore, by inserting the proximal end of the connector main body 104 of the back connector 100 into the female socket 200, the end ferrule 102 and the receiving ferrule 202 can be optically connected, and at the same time, the connector side electrical connection terminal 110 and the device The electrical connection with the side electrical connection terminal 210 becomes possible.

  As shown in FIG. 11, the optical fiber 88 </ b> B is connected to the receiving ferrule 202 and the electrical wiring of the substrate 211 is connected to the equipment side electrical connection terminal 210 inside the equipment side connection unit 204. The female socket 200 including the device side connection unit 204 is incorporated in an IABP driving device, a blood pressure measurement display device, or the like that is not shown.

  The optical signal transmitted to the optical fiber 88B of the female socket 200 includes the pressure signal detected by the optical pressure sensor 84 shown in FIGS. The optical signal is converted into a blood pressure signal by an IABP driving device (not shown) or a blood pressure measurement display device, and used as a blood pressure data for a driving signal of the IABP driving device. Specifically, based on the blood pressure fluctuation data measured by the pressure sensor, the pump device is controlled according to the pulsation of the heart, and the balloon portion 22 shown in FIG. 8 is inflated in a short cycle of 0.4 to 2 seconds. And is supposed to shrink. Alternatively, the blood pressure data can be displayed in real time.

  As shown in FIG. 11, a recess 106b is formed on the inner periphery of the cover member 106 at the proximal end side, and the cover member 106 is fixed to the bottom surface of the connector body 104 (sliding sleeve 104A) in the recess 106b. An IC chip 112 as a certain memory element is arranged. The IC chip 112 is connected to the connector side electrical connection terminal 110 through the back surface of the connector main body 104. The IC chip 112 can store, for example, data related to the medical stylet 60 or a catheter (balloon catheter 20) to which the medical stylet 60 is coupled, and the data is transmitted through the electrical connection terminals 110 and 210. Can be read. In addition, data stored in the IC chip 112 can be rewritten through the electrical connection terminals 110 and 210.

  The data that can be stored in the IC chip 112 is not particularly limited, but is data for compensating for individual differences of the optical pressure sensor 84, data on the expansion outer diameter and capacity of the balloon portion and product number, or balloon catheter. There are other types. The types of balloon catheter include a short balloon type, a long balloon type, and other special shape types.

  In the IABP driving device (not shown), the flow rate of the pressure fluid sent from the driving device to the balloon catheter can be automatically adjusted based on the data stored in the IC chip 112. That is, when the volume of the balloon portion is small, the flow rate of the pressure fluid sent to the balloon catheter is also small.

  Further, the data written to the IC chip 112 of the medical stylet 60 used together with the used balloon catheter is not particularly limited. For example, the identification number of the driving device that actually drives the balloon catheter is exemplified. . In that case, even after the balloon catheter 20 and the medical stylet 60 shown in FIG. 8 are removed from the drive device, the drive device using the balloon catheter 20 can be easily identified.

  Therefore, by reading the data of the IC chip 112 and combining the data of the driving device specified from the data, the driving state of the balloon catheter 20 used at the time of clinical research or troubleshooting can be accurately determined later. It becomes easy to grasp and the time required for the analysis of the driving state can be shortened.

  When the memory capacity of the IC chip 112 has a margin, the data written to the IC chip 112 is, for example, all data of the driving state of the driving device that actually drives the balloon catheter 20 or a part of the data. May be. Examples of data relating to the driving state include waveform data such as an electrocardiogram, blood pressure, and driving pressure during the driving period, and event data during the driving period.

  Reading such data from the IC chip 112 makes it easy to accurately grasp the driving state of the used balloon catheter 20 later during clinical research or troubleshooting, and the time required for analyzing the driving state. Can be shortened.

  As shown in FIG. 11, in this embodiment, the cover member 106 is held so as to surround the distal end portion of the connector body 104, so that the operator holds the cover member 106 or the strain relief 94 with one hand. It becomes easy to detachably connect the proximal end of the connector main body 104 to the device side connection portion 204 of the female socket 200. Moreover, the connection between the end ferrule 102 and the receiving ferrule 202 is made only by connecting the proximal end of the connector body 104 to the device side connection portion 204, and at the same time, the connector side electrical connection terminal 110 and the device side. Connection to the electrical connection terminal 210 is made.

  As shown in FIG. 12, the apparatus side connection part 204 is the female socket 200, and a pair of engagement pieces 220 are disposed therein. The engagement piece 220 is made of, for example, an elastically deformable synthetic resin, and the hook portions of the engagement piece 220 are detachably engageable with engagement recesses 122 formed on both sides of the connector main body 104. Yes. The engaging recess 122 is formed in the ferrule casing 120 mounted inside the sliding sleeve 104 </ b> A of the connector main body 104. The ferrule casing 120 holds the end ferrule 102 therein, and is mounted inside the sliding sleeve 104A so as to be axially movable within a predetermined range. The cable 90 is connected to the ferrule casing 120, and is movable in the axial direction within a predetermined range with respect to the sliding sleeve 104A of the connector main body 104. The engagement piece 220 of the female socket 200 is a sliding sleeve only when the connector main body 104 is inserted into the female socket 200 with the sliding sleeve 104A pushed into the ferrule casing 120 in the connecting direction. 104 A can be overcome and engaged with the engaging recess 122 of the ferrule casing 120, and even if it is inserted in any other state, the sliding sleeve 104 A becomes a hindrance and engages with the engaging recess 122. Can not be matched.

  A medical stylet 60 according to this embodiment shown in FIG. 1 is used together with, for example, the balloon catheter 20 shown in FIG. The balloon catheter 20 is conveyed to a predetermined position in the body through a guide wire (not shown) to a lumen 31 for introducing the balloon catheter 20 into the body.

  Thereafter, after the guide wire is removed from the lumen 31, the port connection portion 72 of the front connector 70 in the medical stylet 60 is attached to the attachment port 52 of the handle portion 42 of the balloon catheter 20, as shown in FIG. It is done. As a result, the insertion wire 80 can be inserted into the lumen 31 of the inner tube 30 from the distal end wire 81 side.

  As shown in FIGS. 2 and 3, the distal end wire 81 is attached to the distal end portion of the hollow wire 82, and can be formed with a different material, characteristic, or shape from the hollow wire 82. It can be easily guided to the inside of the lumen 31 shown in FIG. 8 and easily reach the target position.

  Further, by inserting the medical stylet 60 into the balloon catheter 20, the rigidity of the balloon catheter 20 is increased, the possibility that the balloon portion 22 of the balloon catheter 20 is pushed back by the blood flow is reduced, and kinking (breaking) is also caused. It can be effectively prevented.

  Furthermore, in this embodiment, as shown in FIG. 3, since the optical pressure sensor 84 is provided on the rear side of the distal end wire 81, as shown in FIGS. The position of the distal end edge (substantially the same as the position of the optical pressure sensor 84) may be positioned inside the inner tube 30 at a predetermined distance L2 from the distal end opening 23 of the balloon catheter 20 toward the proximal end. it can. As a result, blood pressure and the like can be accurately measured by the optical pressure sensor 84 without being affected by blood clots and without being affected by electrical noise.

  In this embodiment, as shown in FIGS. 8 and 9, when the insertion wire 80 of the medical stylet 60 is inserted and attached to the lumen 31 of the inner tube 30, that is, the medical stylet 60 is attached. When the port connection portion 72 of the front connector 70 is attached to the attachment port 52 of the second inner tube end holder 50 in the handle portion 42 of the balloon catheter 20, the position of the distal end 81a of the distal end wire 81 is The balloon catheter 20 is prevented from jumping out from the distal end opening 23 of the balloon catheter 20, and the distal end 81a is located at a predetermined distance L1 from the distal end opening 23 toward the proximal end. The predetermined distance L1 prevents the distal end 81a from protruding from the distal end opening 23 even when there is vibration due to the driving of the balloon and the like, and the optical pressure sensor 84 measures a more accurate pressure. Therefore, the thickness is preferably 30 to 250 mm. The predetermined distance L2 is preferably 31 mm or more.

  In this embodiment, by introducing a liquid such as physiological saline or an anticoagulant drug solution from the branch port 73 shown in FIG. 8, the liquid around the optical pressure sensor 84 positioned in the lumen 31 of the balloon catheter 20. It is possible to suppress the formation of blood clots and the like around the sensor 84 and to accurately detect blood pressure and the like.

  In particular, in the back connector 100 as the optical connector for a medical instrument according to this embodiment, the cover member 106 holds the connector main body 104. As the connector main body 104, for example, a general-purpose push-pull optical connector can be used. In this embodiment, an SC-type optical connector is used. Since the cover member 106 is larger than the connector main body 104, even a medical staff who is not familiar with the handling of the optical connector can easily hold the cover member 106. A strain relief 94 is connected to the cover member 106. Therefore, even when a medical person grasps the strain relief 94 and tries to connect the back connector 100 to the female socket 200 of the external device, the force to be connected is connected to the connector main body via the cover member 106. 104, the end ferrule 102 of the connector main body 104 can be reliably connected to the receiving ferrule 202 of the external device.

  When a general-purpose push-pull optical connector is used as it is without providing the cover member 106, a medical staff grasps the strain relief 94 and connects the back connector 100 to the female socket 200 of the external device. Then, the connection tends to be incomplete. This is because in a general-purpose push-pull optical connector, the strain relief 94 is attached to the distal end of the ferrule casing 120 attached to the inside of the sliding sleeve 104A of the connector body 104 or directly to the outer periphery of the cable 90. It is. Therefore, even if the strain relief is gripped by mistake and the end ferrule of the connector main body 104 is inserted into the female socket 200 of the external device, the force may not be transmitted to the sliding sleeve 104A of the connector main body 104. For this reason, the sliding sleeve 104A is not pushed into the ferrule casing 120, and there is a possibility that the engaging piece 220 and the engaging recess 122 are not conveniently engaged. In this embodiment, this inconvenience can be solved.

  In this embodiment, as shown in FIG. 10B, the cover member 106 includes a first inward convex portion 130 that engages with a stress relaxation groove 95 formed at the proximal end portion of the strain relief 94, and a connector. And a second inward convex portion 132 that engages with a knob concave portion 124 formed on the outer periphery of the distal end portion of the main body 104. Therefore, in this embodiment, the connection between the cover member 106 and the connector main body 104 and the connection between the cover member 106 and the strain relief 94 are easy. Moreover, since it is not necessary to add processing to the connector main body 104 and the strain relief 94, commercially available ones can be used, which contributes to cost reduction.

  Further, since the cover member 106 is configured by combining a pair of halves 106A and 106B, the connection between the cover member 106 and the connector main body 104 and the connection between the cover member 106 and the strain relief 94 are also performed in this respect. Is easy. Further, since the main portion of the strain relief 94 is exposed from the distal end portion of the cover member 106 and covers the periphery of the cable 90, it is ensured that the cable 90 is particularly susceptible to damage near the cover member 106. Can be protected.

  The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

  For example, the optical connector for medical instruments of the present invention can be used for applications other than the back connector of a medical stylet. The medical instrument in which the optical connector for the medical instrument is used is not particularly limited, and an optical sensor visceral catheter such as an optical pressure sensor visceral intra-aortic balloon catheter, an endoscope, an endoscopic treatment instrument, a laser diagnostic apparatus, Examples include a laser treatment apparatus, a medical image diagnosis system, an intravascular image diagnosis apparatus, a blood pressure monitor, and a biological information monitor.

DESCRIPTION OF SYMBOLS 20 ... Balloon catheter 22 ... Balloon part 23 ... Distal end opening 24 ... Outer tube 25 ... Distal end tip part 29 ... Pressure fluid conduction path 30 ... Inner pipe 31 ... Lumen 42 ... Handle part 44 ... Wire insertion port 46 ... Pressure Fluid introduction outlet 52 ... Mounting port 60 ... Medical stylet 65 ... Connector 70 ... Front connector 72 ... Port connection 73 ... Branch port 74 ... Connection port 75 ... Ferrule holding part 76, 77 ... Ferrule 80 ... Insertion wire 81 ... Distal end wire 82 ... Hollow wire 82a ... Mounting distal end 82b ... Opening 84 ... Optical pressure sensor 88, 88A, 88B ... Optical fiber 90 ... Cable 92, 94 ... Strain relief 95 ... Stress relief groove 100 ... Back Connector (Optical connector for medical equipment)
102 ... End ferrule 104 ... Back connector body (connector body)
DESCRIPTION OF SYMBOLS 106 ... Cover member 110 ... Connector side electrical connection terminal 112 ... IC chip 124 ... Knob concave part 130 ... First inward convex part 132 ... Second inward convex part 200 ... Female socket 202 ... Receiving side ferrule 204 ... Equipment Side connection

Claims (7)

A connector body holding an end ferrule connected to the proximal end of the cable containing the optical fiber;
A cover member held around the distal end of the connector body;
An optical connector for a medical instrument having a stress relaxation member connected to a distal end portion of the cover member and surrounding an outer periphery of the cable. The cover member is
A first inward protrusion that engages with a stress relief groove formed at a proximal end of the stress relief member;
The optical connector for a medical instrument according to claim 1, further comprising: a second inward convex portion that engages with a knob concave portion formed on an outer periphery of a distal end portion of the connector main body.   The optical connector for a medical instrument according to claim 1, wherein the cover member is configured by combining a pair of halves.   The medical connector optical connector according to claim 1, wherein a main portion of the stress relaxation member is exposed from a distal end portion of the cover member and covers the periphery of the cable. A connector-side electrical connection terminal is attached to the proximal end of the connector body,
The connector-side electrical connection terminal can be detachably connected to the equipment-side electrical connection terminal, and the equipment-side electrical connection terminal is attached to the equipment-side connection portion together with the receiving-side ferrule, The optical connector for a medical instrument according to any one of claims 1 to 4, wherein the receiving ferrule is detachably connectable to the end ferrule of the connector main body. Inside the cover member, a memory element connected to the connector-side electrical connection terminal is mounted,
The memory element stores data relating to a medical device to which a distal end of the optical fiber is connected;
The optical connector for a medical instrument according to claim 5, wherein the data can be read through the connector-side electrical connection terminal. The optical connector for a medical instrument according to any one of claims 1 to 6, wherein the connector body is an SC type optical connector.

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