Locking handle deployment mechanism for medical device

Reference of related applications

The present invention is a partial continuation of US Patent Application No. 09 / 975,873 filed on October 12, 2001.

The present invention generally relates to medical instruments, and in particular to delivery systems with improved locking handles with a composite mechanism.

The present invention also relates to delivery systems that include medical instruments and are used to deliver them to a desired site for treatment and then to deliver them. Many such medical instruments are elastically compressed to small initial dimensions for internal storage, internal protection, storage and final delivery of the catheter system. At deployment time, the medical device can elastically expand to large deployment dimensions.

A successful example of a delivery catheter system in the case of self-expanding stents is the "Delivery Aparetas for a Self-Expanding Stent" given to Wilson et al. On February 1, 2000. For A Self-Expanding It is described in Patent Document 1 having "Stent)" as the title of the invention. The disclosures of this U.S. patent specification are cited as forming part of this application. Such US patent specification discloses a flexible or flexible catheter system generally shown in the typical schematic form in FIG. 10, which is a coaxially arranged inner and outer catheter. Members are provided, and hubs are attached to the proximal ends of each of these catheter members. This outer sheath is described in Patent Document 1 as an elongated tubular member having a distal end and a proximal end, and this member is an outer polymer layer, an inner polymer layer, and between them. The inner shaft, which is composed of the positioned braided reinforcing layer, is described in Patent Document 1 as being coaxially arranged in the outer sheath, and the inner shaft has a flexible or flexible tapered tip. It has a portion, and the tapered tip generally extends distally beyond the tip of the outer sheath. The inner shaft member is also shown to have a stop or stop located proximal to the tip of the outer sheath. The self-expandable stent is placed in the outer sheath and is placed between the stop in the inner shaft member and the tip of the outer sheath. To deploy the stent, the outer sheath is pulled back by the doctor in the proximal direction, but the position of the inner shaft member is retained.

Another example of various types of known self-expanding stent delivery systems was granted to Gianturco on April 8, 1986, Patent Document 2, and Wallsten et al. On March 22, 1988. It is disclosed in Patent Document 3 granted to.

To explain the action, each of the known medical device delivery systems is generally along the desired vascular or other internal route to the patient until the medical device in the catheter system is placed at the desired site for treatment. Advance into the body of. While observing the relative position of each part of the medical device and catheter system with respect to the stenosis on the video fluoroscopy screen, the doctor holds the proximal hub, which is secured to the inner shaft member, in a fixed position with one hand. At the same time, gently pull back the proximal hub attached to the outer tubular sheath with another hand.

For several reasons, this deployment operation may require some dexterity. For example, these reasons include dynamic blood flow at the desired site for treatment, which can be further disrupted by the presence of the diseased or stenotic site being treated. .. Another factor is the gradual elastic expansion of the medical device when the outer sheath is retracted. This gradual expansion gives the opportunity for the reverse "watermelon-seed" phenomenon to occur in some cases. Due to this reverse watermelon-seeding action, elastic medical instruments may tend to push the sheath back proximally with a force that tends to change as the sheath is gradually retracted.

As a result of the above, the doctor holds the two proximal hubs precisely in specific relative positions, holding them against the diastolic force, while the medical instrument contacts the anatomy. It may be necessary to attempt to position the medical device very accurately until this is done. An example of the possibility of affecting the positioning of the medical device in the deployed state is that the inner shaft needs to be stationary and held in a preferably desired position. If the physician inadvertently moves the hand holding the hub of the inner shaft during deployment, it is possible that the medical device will be deployed in a non-optimal position.

Another possible factor is that the medial and lateral catheter shaft members, like any other elongated object, do not have infinite strut strength, which depends on the position and movement of their respective proximal hubs. The position and movement of the respective tips of the inner and outer shaft members can provide different opportunities. Yet another factor is that the position of the medical device is adjusted to a position where a part of the extended portion of the medical device contacts each side wall of the internal passage, and the position of the medical device is preferably the medical device. It is that it needs to be carefully adjusted until just before a part comes into contact with its anatomy.

Some known catheter systems require two-handed operation, for example, one that has a pair of independent hubs that require one hand to operate the hubs of the inner and outer shaft members, respectively. is there. Some known catheter systems have a pistol and a trigger-type grip in a one-time deployment mode in which the trigger only needs to be pulled once to deploy the attached medical device.<patcit num="1"><text>U.S. Pat. No. 6,019,778</text></patcit><patcit num="2"><text>U.S. Pat. No. 4,580,568</text></patcit><patcit num="3"><text>U.S. Pat. No. 4,732,152</text></patcit>

<p> Therefore, physicians should be able to operate these known systems with good skill, but provide an improved catheter delivery system that allows for easier and more accurate deployment and positioning of elastically dilated medical instruments. Is desirable.</p><p> In addition, it is desirable to provide a new type of catheter deployment or delivery mechanism with two modes of operation. In the first mode of operation, the delivery mechanism preferably comprises an precisely adjustable link between the medial and lateral catheter shaft members so that the relative position of the lateral sheath relative to the medial catheter shaft member is accurate and selective. It is adjustable to. However, at any selected position, the delivery mechanism can preferably give the medial or lateral catheter shaft members a tendency to move relative to each other while maintaining the selected relative positions of the medial and lateral catheter shaft members. You need to resist all sexual forces. In the second mode of operation, the delivery mechanism is preferably a physician, preferably with a single easy motion, to quickly pull the outer tubular sheath back relative to the inner catheter shaft member in the proximal direction. Need to be possible.</p><p> In addition, it is desirable to provide an integrated ergonomic handle for easy and effective operation of the stent delivery system of the present invention. It is also desirable to provide a handle for operating a stent delivery system equipped with a locking mechanism. Such a locking mechanism preferably resists inadvertent or accidental movement or withdrawal of the stent delivery system component during packaging, sterilization, transport, storage, handling and preparation of the stent delivery system component. The lock is preferably spring-loaded or easily released.</p><p> In addition, the handle mechanism also allows activation and retracting of the sheath only, but resists attempts to re-advance the sheath or re-cover the medical device.</p><p> Another embodiment of the invention is to provide a single actuator that performs both or all of the multiple operating modes of the handle and delivery system.</p><p> Additional embodiments of the present invention relate to various types of exercise that activate each mode of operation. For example, a single actuator can rotate in the first mode of operation and slide in another mode. Alternatively, a single actuator can rotate in one direction to obtain a first mechanical benefit and in another direction to obtain another mechanical benefit.</p>

<p> Therefore, the present invention is an integrated human in which the integrated handle replaces the function of the separate proximal hubs of the conventional inner and outer catheter shaft members, resulting in the desired dual operating mode and desired locking system. It provides such a desirable medical device delivery mechanism with an ergonomic handle.</p><p> The above and various other purposes, advantages and features of the present invention will become apparent by reading the following description and claims with reference to the accompanying drawings.</p>

<p> The present invention preferably brings several advantages individually or in combination of such advantages, such as (i) the ability to operate the medical device delivery system with one hand, (ii) the above. To obtain a mechanism that provides the action or mechanical benefit of leverage to regulate or reduce the force required to operate the system, (iii) improve the positioning accuracy of the medical device being deployed, (iv) A number of modes of operation can be obtained, including, for example, a fine and accurate first control mode during the deployment phase and a quick and easy second deployment mode.</p><p> Further advantages are that (i) an integrated ergonomic handle is provided for easy and effective operation of the stent delivery system of the present invention, and (ii) components of the stent delivery system. Provided a locking mechanism capable of resisting inadvertent or accidental movements or withdrawals during packaging, sterilization, transportation, storage, handling and preparation, (iii) during the intermediate stages of deployment of medical instruments. The ability to hold the components of the delivery system in a fixed relative position is mentioned.</p>

The following description of each preferred embodiment of the present invention is merely exemplary in its entirety and therefore does not limit the present invention and its applications or methods of use in any way. Numerous modifications can be made by skilled personnel in the art without departing from the true spirit and scope of the invention.

With reference to the drawings, a medical device delivery system is shown, one of the preferred embodiments of the invention being designated by reference numeral 10. The illustrated stent delivery catheter system 10 is, of course, merely an example of the design of many different medical instrument delivery systems within the scope of the present invention. The present invention can be designed to deliver and deploy any suitable medical device. However, for clarity and convenience, the following detailed description only illustrates such an example of a delivery system for a stent.

One of the available medical device delivery systems available according to the present invention is any suitable system in which the outer sheath surrounds the inner shaft. The medical device can be transported within the outer sheath during delivery to the desired site for treatment, in which case the outer sheath is retractable, but the inner shaft and medical device are held in place.

The novel technical idea of the present invention is that the movement of the operator for deploying the medical device is selected from any suitable possibility including axial movement or rotational movement in the proximal or distal direction. It is also available for instrument delivery systems, trigger actuators, gear mechanisms, or any other type of actuator that may be preferred depending on the particular application. In fact, a unique technical idea of the present invention can be applied to a medical device delivery system in which the medical device is deployed in any suitable manner, in which the outer sheath is proximal or distal. Retracting operations or exposing medical instruments in various ways include operations that retract parts of the outer sheath member simultaneously or continuously in the proximal and distal directions. Be done.

The present invention preferably brings several advantages individually or in combination of such advantages, such as (i) the ability to operate the medical device delivery system with one hand, (ii) the above. To obtain a mechanism that provides the action or mechanical benefit of leverage to regulate or reduce the force required to operate the system, (iii) improve the positioning accuracy of the medical device being deployed, (iv) A number of modes of operation can be obtained, including, for example, a fine and accurate first control mode during the deployment phase and a quick and easy second deployment mode.

Further advantages are that (i) an integrated ergonomic handle is provided for easy and effective operation of the stent delivery system of the present invention, and (ii) components of the stent delivery system. Provided a locking mechanism capable of resisting inadvertent or accidental movements or withdrawals during packaging, sterilization, transportation, storage, handling and preparation, (iii) during the intermediate stages of deployment of medical instruments. The ability to hold the components of the delivery system in a fixed relative position is mentioned.

A particular embodiment of the invention selected for illustration comprises a handle 10 detailed in FIGS. 1-10. The upper main body housing 12 and the lower main body housing 14 are arranged in an upper and lower form as shown in FIGS. 1 and 3, for example. Other components include an inner shaft member 16, an outer shaft member 18, an anchor member 20, a proximal hub 22 with an actuator or knob 24 and a corresponding flush lumen tube 26 as well as a threaded base member 30 and a rotary finger ring 32. Can be mentioned.

In addition, the handles of the present invention preferably resist the rotational movement of the finger ring 32 with respect to the upper body housing 12 and the lower body housing 14, thus blocking the movement of the threaded base 30 and the proximal hub 22. As a result, the outer shaft member 18 has a lock mechanism 28 that freely locks the outer shaft member 18 to the handle 10 and the inner shaft member 16 in the initial position.

The lower housing 14 preferably has some gripping knurls 34 that provide the surgeon with a good gripping surface, whereas the upper body housing 12 slides the movable actuator 24 and thus the actuator 24. And has longitudinal slots 36 that make up the channels that limit the possible range of movement of the proximal hub assembly 22. The upper body housing 12 and the lower body housing 14 work together to capture a portion of the anchor member 20, the opening 38, which allows the surgeon to operate the rotary finger ring 32. It constitutes several internal openings that accommodate the anchor holes 40, the distal shaft aperture 42 that penetrates the inner shaft member 16 and the outer shaft member 18, and the fasteners 44 that hold the body housings 12, 14 together. These also constitute a circular ring bearing shelf or shoulder 46.

In a preferred initial form, the proximal hub 22 is attached to a threaded base 30, which rotatably supports the rotary finger ring 32. The distal surface of the rotary finger ring 32 abuts and is supported by the shoulder 46 of the body housing 12. The rotation of the rotating finger ring 32 causes the finger ring to press against the shoulder 46 and pull the threaded base 30, resulting in a very accurate and precise retracting motion of the outer shaft member 18 in the proximal direction. It will be. Next, if a faster retract of the outer shaft member 18 to the proximal side is desired, the surgeon may grab the actuator 24 and quickly pull the hub 22 directly behind in the proximal direction.

In the particular assembly shown, the body housings 12, 14 are joined together by fasteners 44. The anchor hole 40 fixedly receives the anchor 20, and the anchor 20 is fixed to the proximal end of the inner shaft member 16. The proximal end of the outer shaft member 18 is fixed to the proximal hub 22, and a flexible strain relief 48 protects the joint.

An example of how to operate the medical device delivery system of the present invention is schematically shown in FIGS. 11 to 14, and these figures show a handle 54 having a different appearance from the handle 10 shown in FIGS. 1 to 10. Is shown. To explain the action, the distal end 56 of the medical device delivery system is preferably guided into the patient via an internal passage. The medical device delivery system preferably follows a guide wire (not shown) and (or) travels through a pre-arranged guide catheter (not shown), and finally the distal end 56 is the desired treatment. Try to reach the point. As shown in FIG. 11, the distal tip 56 preferably traverses the incision or stenosis 58. When the instrument is in the correct initial position, the surgeon unlocks or breaks the invention. One embodiment of the lock is shown in FIGS. 1 and 4, and of course, the scope of the invention extends to a wide variety of forms of lock, such as pins, clamps, breakable. Members, spring locks, splines or keys can be mentioned. The lock may be released only once, or may be activated and released repeatedly. For example, the locks shown in FIGS. 1-10 can first be released by squeezing the components and then used to re-lock the system to, for example, another position or form shown in FIG.

Such a locking mechanism preferably resists inadvertent or accidental movement or withdrawal of the stent delivery system component during packaging, sterilization, transportation, storage, handling and preparation.

After unlocking, the preferred action of the present invention is to first turn the finger ring 60, which travels along it on the threaded base 62 and hits the shoulder 64, threaded base 62, proximal hub and outer. This can be achieved by causing the entire assembly of shaft member 66 to retract proximally to the handle 54 and thus to the inner shaft member 68. The first retracting method of the outer sheath 66 enables accurate and highly sensitive adjustment.

As shown in FIGS. 11 and 12, the surgeon can rotate the finger ring 60 slightly to pull the outer sheath 66 back slightly. This slight movement exposes a small portion of the medical instrument, in this case the stent 50, as shown in FIG. In this embodiment, the handles of the present invention hold the outer sheath 66 in place with respect to the inner body 68 to resist further inadvertent expansion of the stent 50. In this case, the surgeon selectively optimizes the position of the medical instrument and delivery system within the desired site, as indicated by the arrows in FIG. 12, and the time and procedure for making final adjustments to it. Get the flexibility of. It is preferable to make this precise adjustment of the position of the stent 50 before it hits the body passage or blood vessel 70 in such a way that any part of the stent 50 impedes further adjustment of the position.

When the surgeon is satisfied with the positioning as it is displayed on the fluoroscopic video screen, the surgeon can continue to rotate the finger ring 60 to further retract the outer sheath 66 as shown in FIG.

When the stent 50 and the wall of the vessel first come into contact, or when the stent expands sufficiently to hold its position independently, or when the stent expands at any desired location, the surgeon grabs the knob 72. All you have to do is pull or push along slot 74 as shown by the arrow in FIG. This second method of retracting the outer sheath 66 allows for relatively significant and rapid movement at any speed desired by the surgeon, thereby allowing the medical instrument to be deployed quickly.

A variety of materials can be selected for the components of the invention, including any material with the desired performance characteristics. In the particular embodiment shown, the inner shaft member 16, the outer shaft member 18, the strain relief 48 and the distal tip 56 are of any biocompatibility and can flex appropriately but are strong enough. It can be composed of certain materials, such materials include various types of polymers. Possible selection examples of such materials include nylon or polyamide, polyimide, polyethylene, polyurethane, polyether, polyester. As a modification, part or all of the inner shaft member 16 and / or the outer shaft member 18 may be made of soft metal, such soft metal includes, for example, stainless steel or nitinol hypotube. .. The stent 50 is preferably made of any biocompatible material that is strong and rigid, such biocompatible materials include, for example, stainless steel, platinum, tungsten and the like. The components of the handle of the present invention are preferably made of a strong and rigid material, such as non-flexible polycarbonate, or some metal components.

Not surprisingly, many different variations are within the scope of the invention. Some of these modifications or other embodiments include possible configuration examples for various dimensions, materials and designs that fall within the scope of the invention as described in the claims.

In addition, the assembly of the inner shaft member 16 including the anchor 20, the inner shaft member 16 and the distal tip 56 preferably comprises a through lumen that is adapted to accept the guide wire.

It goes without saying that many forms of the present invention are feasible. The above is merely a description of exemplary embodiments that demonstrate the principles of the invention, and the scope of the invention is described in the claims. Those skilled in the art can easily recognize from the above description, claims and drawings that numerous modifications and modifications can be made without departing from the spirit and scope of the present invention.

Specific Embodiment of the present invention<u style="single">, Reference form</u>Is as follows.<u style="single">(Embodiment A)</u><u style="single"> A medical device delivery system for the treatment of a patient, an inner shaft with proximal and distal ends, and a tubular outer sheath, at least in part surrounding a portion of the inner shaft member. It has a medical device initially provided within the outer sheath and a handle operatively coupled to the inner shaft and outer sheath, the handle being the first for adjusting the relative position of the inner shaft and outer sheath. The result of the surgeon's input to one of the first and second actuators and the inner shaft and outer sheath, respectively. Providing a different amount of mechanical benefit from the relative position obtained, the medical device delivery system holds the outer sheath openly in its initial form with respect to the inner shaft, thereby causing the outer sheath to be in its initial form. A medical device delivery system characterized by further having a locking member that tends to hold in and resist inadvertent exposure of the medical device.</u> (1) The locking member has a first surface and a second surface, and in the initial form, the first surface freely holds the components attached to the outer sheath, and the second surface is , It is characterized by being able to hold a part of the handle freely.<u style="single">Embodiment A</u>The medical device delivery system described. (2) The lock member is characterized by having one or more flanges that freely resist one or more movements of the twelfth actuator and the second actuator.<u style="single">Embodiment A</u>The medical device delivery system described. (3) The first actuator is characterized by providing a 1: 1 mechanical benefit.<u style="single">Embodiment A</u>The medical device delivery system described. (4) The first actuator is characterized in that it slides along a longitudinal slot formed by a handle.<u style="single">Embodiment A</u>The medical device delivery system described. (5) The second actuator provides greater than 1: 1 mechanical benefit, which makes it easier for the operator to overcome the initial resistance to changes in the initial relative position of the inner shaft and outer sheath.<u style="single">Embodiment A</u>The medical device delivery system described.

(6) The second actuator is characterized in that it rotates around a threaded base.<u style="single">Embodiment A</u>The medical device delivery system described. (7) The second actuator is characterized by providing a variable mechanical benefit that can be selected from a preselected range of mechanical benefits considered by the operator.<u style="single">Embodiment A</u>The medical device delivery system described. (8) One of the first actuator and the second actuator is formed as a lever.<u style="single">Embodiment A</u>The medical device delivery system described. (9) It is characterized by further having a guide wire lumen that slidably accepts a flexible guide wire.<u style="single">Embodiment A</u>The medical device delivery system described. (10) The medical device is characterized by being a stent.<u style="single">Embodiment A</u>The medical device delivery system described.

(11) The medical instrument delivery system according to embodiment (10), wherein the stent is self-expanding. (12) It further has an integrated actuator knob, the first actuator is a slider coupled to an outer sheath that is slidable with respect to the handle, and the second actuator is a knob and slider. It is a threaded joint provided between them, and the integrated actuator knob is characterized in that it operates both the first actuator and the second actuator.<u style="single">Embodiment A</u>The medical device delivery system described.<u style="single">(Reference form B)</u><u style="single"> A handle that operates a medical device delivery system for the treatment of a patient, which is movably coupled to a housing, a first shaft member attached to the housing, and a first shaft member. A second shaft member that can move in the longitudinal direction with respect to the shaft member, and a first means and a second means for selectively moving the second shaft member with respect to the first shaft member. The first means can accurately and highly sensitively adjust the position of the second shaft member, and the second means can quickly and highly adjust the position of the second shaft member. It is designed to allow relatively significant movement, and the handle further has a locking member that releasably holds the first and second shafts in a fixed initial relative position. Characterized handle.</u><u style="single">(Reference form C)</u><u style="single"> A handle that operates a stent delivery system for patient treatment, surrounding a housing with slots and drive shoulders, an inner shaft member attached to the housing, and at least a portion of the inner shaft member. An outer shaft member that can move longitudinally with respect to the inner shaft member and a hub that is attached to the proximal end of the outer shaft member and can move longitudinally within the housing. With the assembly, the hub assembly has a grip knob and a threaded drive member, the grip knob extends outward through a slot in the housing, and the hub member is by pulling the grip knob. Can move directly in the longitudinal direction with respect to the inner shaft member, the handle further comprises a bearing surface and a rotatable actuator mounted in a screwed relationship around a threaded drive member. By rotating the actuator in a selected direction around the threaded drive member, the rotatable actuator presses against the bearing surface, thereby pulling the threaded drive member, hub and outer shaft member proximally. The position of the outer shaft member with respect to the inner shaft member can be adjusted accurately and with high sensitivity by the rotatable actuator, and the movement of the grip knob allows the outer shaft member to move quickly and relatively significantly with respect to the inner shaft member. The handle further includes a locking member that freely holds the inner shaft and the outer shaft in a fixed initial relative position.</u><u style="single">(Reference form D)</u><u style="single"> It s a treatment method for patients.</u><u style="single"> (a) Proximal ends, distal ends, handles provided near the proximal ends, and medical instruments that can be deployed by the delivery system to perform the treatment procedure at the desired treatment site. It has a delivery mechanism that selectively and gradually releases the medical device and a locking member that holds the delivery mechanism in its initial form, and the locking member tends to freely resist the careless release of the medical device by the delivery mechanism. It has a stage of preparing a medical device delivery system, the medical device is placed in the delivery mechanism, and the handle has a first actuator and a second actuator coupled to the delivery mechanism.</u><u style="single"> (b) have the step of inserting the medical device delivery system along the internal passage until the distal end of the delivery system is located at or near the desired treatment site.</u><u style="single"> (c) Has a stage to unlock the lock member,</u><u style="single"> (d) It has a step of moving the first actuator on the handle by the first selected amount, and the such movement of the first actuator causes the delivery mechanism to move exactly a certain amount at the first proportional speed. The delivery mechanism is designed to partially release the medical device,</u><u style="single"> (e) The second actuator is moved on the handle, whereby the delivery mechanism has a step of moving quickly, at a second proportional speed greater than the first proportional speed, to completely release the medical instrument.</u><u style="single"> (f) It is characterized by having a step of retracting the medical device delivery system and removing it from the body passage so that the medical device can remain located at the desired treatment site. Method.</u> (13) Carefully evaluate the position of the medical device compared to the position of the desired treatment site between steps (d) and step (e) and adjust the position of the medical device delivery system based on the evaluation results. It is characterized by having a further stage of<u style="single">Reference form D</u>The method described.<u style="single">(Reference form E)</u><u style="single"> It s a treatment method for patients.</u><u style="single"> (a) Proximal ends, distal ends, handles provided near the proximal ends, and medical instruments that can be deployed by the delivery system to perform the treatment procedure at the desired treatment site. It has a delivery mechanism that selectively and gradually releases the medical device and a locking member that holds the delivery mechanism in its initial form, and the locking member tends to freely resist the careless release of the medical device by the delivery mechanism. It has a stage of preparing a medical device delivery system, the medical device is placed in the delivery mechanism, the handle has a first actuator and a second actuator coupled to the delivery mechanism, and the first The actuator is a rotatable knob and the second actuator is a longitudinal slider.</u><u style="single"> (b) have the step of inserting the medical device delivery system along the internal passage until the distal end of the delivery system is located at or near the desired treatment site.</u><u style="single"> (c) Has a stage to unlock the lock member,</u><u style="single"> (d) It has a step of rotating the first actuator by a first selected amount on the handle, and the such rotation of the first actuator causes the delivery mechanism to move exactly a certain amount and the delivery mechanism to be medical. The instrument is designed to be partially released,</u><u style="single"> (e) It has a step of sliding the second actuator longitudinally on the handle, whereby the delivery mechanism moves quickly and completely releases the medical instrument.</u><u style="single"> (f) It is characterized by having a step of retracting the medical device delivery system and removing it from the body passage so that the medical device can remain located at the desired treatment site. Method.</u>(14) Carefully evaluate the position of the medical device compared to the position of the desired treatment site between steps (d) and step (e) and adjust the position of the medical device delivery system based on the evaluation results. It is characterized by having a further stage of<u style="single">Reference form E</u>The method described.

<figref num="1">It is an external perspective view of the medical instrument delivery mechanism constructed according to the principle of this invention.</figref><figref num="2">It is a partial longitudinal sectional view which shows the medical instrument delivery system configured according to this invention in the initial form.</figref><figref num="3">It is a partial side view of the delivery system of the medical device of FIG.</figref><figref num="4">FIG. 2 is a partial cross-sectional plan view of the medical device delivery system of FIG.</figref><figref num="5">FIG. 6 is a partial longitudinal sectional view of a particular component of the medical device delivery system of the present invention.</figref><figref num="6">FIG. 5 is a perspective view of certain components of the medical device delivery system of the present invention.</figref><figref num="7">FIG. 6 is a partial longitudinal sectional view of a particular component of the medical device delivery system of the present invention.</figref><figref num="8">FIG. 6 is a partial longitudinal sectional view of a particular component of the medical device delivery system of the present invention.</figref><figref num="9">FIG. 6 is a partial longitudinal sectional view of a particular component of the medical device delivery system of the present invention.</figref><figref num="10">FIG. 6 is a partial longitudinal sectional view of a particular component of the medical device delivery system of the present invention.</figref><figref num="11">It is a perspective view which showed the proximal end part and the distal end part of the medical instrument delivery system constructed according to the principle of this invention in the operation form.</figref><figref num="12">It is a perspective view which showed the proximal end part and the distal end part of the medical instrument delivery system constructed according to the principle of this invention in the operation form.</figref><figref num="13">It is a perspective view which showed the proximal end part and the distal end part of the medical instrument delivery system constructed according to the principle of this invention in the operation form.</figref><figref num="14">It is a perspective view which showed the proximal end part and the distal end part of the medical instrument delivery system constructed according to the principle of this invention in the operation form.</figref>

Code description

10 Stent delivery catheter system 12 Upper body housing 14 Lower body housing 16 Upper shaft member 18 Outer sheath or outer shaft member 20 Mooring member 22 Proximal hub 24 Actuator or knob 30 threaded base 32 finger ring 44 Fasteners 46 shoulders