Medical device releasing device, system and usage

Abstract

To provide a medical device releasing device and a method for using the same.SOLUTION: A delivery device 10 has a head element 11 provided at a proximal end of the device. A head is constituted to extend through a medical device and proximally protrude from the medical device. The head element has one or more hook elements 13 for being engaged with a control loop connected to the medical device. The one or more hook elements are fixed in an axial direction to the head element.SELECTED DRAWING: Figure 4A

Description

[Technical field]

[0001] The present invention relates to a medical device release apparatus and method of use thereof. [Background technology]

[0002] In this regard, medical devices such as intravascular stent devices generally include a control loop. The delivery system is attached using a combination of loops, eyelets and release wires. As shown in Figures 1 to 3, this connection is made by connecting the free end of the control loop 2 of the control thread to This is achieved by threading the end of the catheter through eyelet 3 and fastening the other end to the tip of the delivery system. The control thread then passes through the eyelet, forming an opening for the control thread. Thread the release wire 4 through the loop to allow the control thread to be pulled back through the eyelet. Prevent.

[0003] By removing the release wire 4, the control loop 2 is pulled back through the eyelet, The device 5 is released from the delivery system, freeing the device from the delivery system. can be done.

[0004] This configuration creates a problem if the release wire becomes damaged and cannot be removed from the control loop. This may require the user to perform additional rescue procedures or to convert completely to laparotomy. This will prevent removal of the delivery system from the patient.

[0005] Also, if the user forgets to remove the release wire before attempting to remove the delivery system, Problems can also arise when the device moves out of the intended sealing area and This can destroy blood vessels and damage blood vessels in the process. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides an apparatus and method that aims to alleviate the problems of such known arrangements. Provide. [Means for solving the problem]

[0007] In accordance with the present invention, a medical device delivery apparatus is provided, the apparatus comprising a head at a proximal end of the apparatus. The head extends through the medical device and proximally from the medical device. The head element is configured to protrude and engage a control loop that is coupled to a medical device. and one or more hook elements for attaching the hook to the head element, the one or more hook elements being axially aligned with respect to the head element. is fixed in the linear direction.

[0008] In this manner, the medical device may be retracted by the delivery system without additional mechanical manipulation of the device. You can be pulled out and liberated at the same time.

[0009] Preferably, one or more of the hook elements face forward and the free end of the one or more hook elements The end extends in a direction toward the proximal end of the head element.

[0010] Conveniently, the head element has two hook elements.

[0011] Preferably, the hook elements are provided on diametrically opposite sides of the head element.

[0012] Advantageously, one or more hook elements extend proximally to define the longitudinal profile of the head element. The axially extending axial grooves project radially outward from the grooves.

[0013] Preferably, the one or more hook elements are provided at a distal end of the head element.

[0014] Advantageously, the one or more hook elements are each in the form of an angled slot and open at a proximal end. and close it at the distal end.

[0015] Preferably, each slot has a tapered profile.

[0016] Conveniently, the head element comprises a head body and a head plate, the head plate comprising a head The one or more head plates are connected to the distal end of the head body and are disposed between the head body and the head plate. A hook element is defined.

[0017] Preferably, the head body is chamfered at a distal end of the head body to facilitate positioning of the one or more flanges. Define the block elements.

[0018] Conveniently, the device further comprises one or more attachment points for the ends of the control loop.

[0019] Preferably, the one or more attachment points are provided on the head element proximal to the one or more hook elements. can be done.

[0020] Conveniently, the one or more hook elements are movable between a deployed position and a non-deployed position. .

[0021] Preferably, the one or more hook elements are pivotable between a deployed position and a non-deployed position. .

[0022] Advantageously, the one or more hook elements are substantially flush with the longitudinal profile of the device. It can be folded to form a surface.

[0023] Preferably, the one or more hook elements are adapted to rotate the head element by the one or more hook elements. The control loop is profiled to facilitate disengagement of any control loops that are engaged by the

[0024] Preferably, one or more of the hook elements comprises an angled portion having a radially extending portion. The radially extending portion is configured to engage the control loop.

[0025] The apparatus preferably includes a hook element for attaching to one or more eyelets of a medical device. The device further includes an alignment means for aligning the device with the target.

[0026] In accordance with a further aspect of the present invention, a medical device deployment system for deploying a medical device is provided. and a medical device deployment system is provided, the medical device deployment system including a medical device having a head element at a proximal end of the device. a medical device delivery apparatus, the head extending through the medical device and the head element is configured to protrude proximally from the chair, the head element being a control coupled to the medical device. The one or more hook elements have a head It is axially fixed relative to the element.

[0027] According to yet another aspect of the present invention, the claimed delivery device or deployment system can be used to A method of deploying a device is provided, the method comprising passing the delivery apparatus through an interior of a medical device. and projecting the proximal end of the medical device from the proximal end of the medical device using one or more control loops. and connecting the medical device to one or more hook elements of the delivery device. advancing to an open site, deploying a medical device at the site, and a delivery device and retracting the one or more control loops from the one or more hook elements. Released, the one or more hook elements are axially secured relative to the head element.

[0028] Preferably, the one or more control loops are attached to a head element of the delivery device, the The medical device is then passed through one or more eyelets and then through one or more of the eyelets. It passes around a lock element and then again through one or more eyelets.

[0029] Conveniently, one or more control loops are attached to the medical device and include one or more hooks. It passes around the element.

[0030] Preferably, the medical device has a wavy proximal end profile and one or more control loops. The loop is attached to a proximal peak of the medical device.

[0031] Advantageously, one or more hook elements may be moved to facilitate disengaging one or more control loops. To burn.

[0032] Preferably, one or more hook elements are pivoted rearward to release one or more control loops. Make it easier.

[0033] Conveniently, the head element is adapted to rotate about a longitudinal axis of the head element to provide one or more restraining This makes it easier to release the control loop. [Brief description of the drawings]

[0034] [Figure 1] FIG. 1 illustrates a known arrangement for delivering a medical device to a site. [Diagram 2] FIG. 2 illustrates a known configuration for delivering a medical device to a site. [Diagram 3] FIG. 3 shows a known arrangement for delivering a medical device to a site. [Figure 4] 4a to 4d show a first embodiment of the present invention. [Diagram 5]5a to 5e show a second embodiment of the present invention. [Figure 6] 6a to 6c show a third embodiment of the present invention. [Figure 7] 7a and 7b show a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] Embodiments of the invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0036] 1-3, as discussed above, relate to a conventional delivery system for an intravascular device. Such systems are suitable for use in the event that the release wire is damaged or the user removes the delivery system. Problems can arise if the release wire is forgotten to be removed before attempting to remove the device.

[0037] Thus, the present invention provides a medical device delivery system that does not require a release wire. This is what we are trying to achieve.

[0038] In this regard, as shown in FIGS. 4a-4d, the delivery device 10 includes a proximal end 14 extending from the longitudinal axis 12. At its end is a tip or head element 11. The head element has a tip 11 extending toward the proximal end of the head element. The hook elements 13 project radially outwardly and forwardly therefrom. In this embodiment, the slot 15 is formed by a head The distal end of the element is chamfered and the plate 14 is connected thereto. As shown, The ends 16 of the plate preferably conform to the general outer longitudinal profile of the head element 11. protrudes radially outward.

[0039] As shown, the head element is passed through the interior of a medical device 17, such as an intravascular stent. In use, the head element 11 is disposed to extend from the proximal end of the medical device 17. For clarity, the structure of the medical device is not shown in detail in the figures, but is shown by the reference numerals An expandable stent device may be provided having an undulating proximal end, generally designated 17. In the embodiment of Figures 4a to 4d, the control loop 19 is located above the hook element, i.e., above the head. One end is attached to the head element at an attachment point 20 near the proximal end of the element.

[0040] Each control loop extends rearward and passes through an eyelet 21 which is connected to a medical device. The loop then returns to the head element and loops around the hook element 11 before being threaded through the eyelet and then rises towards the proximal end of the device.

[0041] 4a-4d show the progression of the head element relative to the medical device 17. The therapeutic device is moved to the correct position relative to the site where it can be fixed in place. This allows the device to seal against the interior surface of the vessel in which it is deployed. This can be done by extending the chair.

[0042] Once properly secured in place, the delivery device is retracted as shown in Figures 4b-4d, and the device The catheter passes rearward through the device toward the distal end of the chair.

[0043] When the eyelet is level with the hook element 11, the control loop is pulled downward into the hook element. It may become taut and therefore begin to come off the hook element as shown in Figures 4b and 4c. Then, in FIG. 4d, the control loop is no longer hooked around the hook element and the delivery As the device retracts it can pass through the eyelet.

[0044] The head element design eliminates the need for a release wire in the attachment method and improves the delivery system. The device is released as soon as the system is removed from the patient, requiring no additional action from the user. do not.

[0045] As mentioned above, this increases the length of the control loop and requires one on each side of the head element or tip. This can be achieved by incorporating two hooks, one each in line with the control loop. To assemble the device into a delivery system, a control loop can be inserted through the eyelet. Once fed, the free end is attached to the hook at the tip.

[0046] When the eyelet of the device is lower than the tip, the control loop is attached to the hook. Thus, during compression and unsheathing, the device The catheter remains attached to the delivery system, but the tip moves below the eyelet. When the delivery system is moved (e.g., when the delivery system is removed from the device), the control loop The device can then be released from the eyelet and pulled out, freeing the device from the delivery system. do.

[0047] Such an arrangement of the present invention does not require a separate mechanical step to withdraw the device. The device can be operated by simply withdrawing the head element, i.e. the distal end of the delivery system. Be liberated.

[0048] In this regard, the hook element is axially fixed in place at the tip of the delivery system. The relative position of the graft to the hooks secures or releases the device.

[0049] In this regard, the hook elements / slots are preferably integrated into the delivery system, It is elevated above the device and angled towards the device for hook / slot placement. The "closed" part is closest to the device, and one end is open to allow the control loop to leave freely. The control loop should preferably be such that one end is a delivery loop (leaving the other end free). It is attached to the system and looped through the eyelet to attach to the hook. The eyelet is preferably attached to the device.

[0050] A second embodiment of the present invention will now be described with reference to Figures 5a to 5e.

[0051] In this embodiment, the control loop 30 is attached to a peak 31 of the first ring of the medical device. When the device is assembled into a delivery system, the control loop is attached to the tip. It simply latches onto the hook elements 32 provided. This attachment method is the same as in the first embodiment. (The relative position of the tip to the control loop attachment point.) The location determines whether the device is attached to the delivery system. However, in this embodiment, the control loop attached to the device will be left in place. .

[0052] The hook element has a head that is attached to the eyelet while still allowing the control loop to pull freely out of the eyelet. A second arrangement may be provided that is detachable from the tip or the end element. Useful in any situation where the control loop gets caught on the hook element and the device cannot be released stand.

[0053] 6a-6c show that the hook element 40 can be retracted to release the device. 3 shows a third embodiment.

[0054] As shown in the fourth embodiment of FIGS. 7a and 7b, the hook element 50 is attached to the head element 11. The rotation of the control loop also causes the control loop to come off the hook, or the control loop The nozzle may be angled or shaped to facilitate ejection.

[0055] The control loop 52 may extend the length of the delivery system and may be disconnected. The device can be released from the delivery system by disconnecting and removing the control It acts as a fail-safe in case the loop gets caught on the hook element.

[0056] Various embodiments of the present invention are directed to medical devices for more precise deployment and easier manufacture. While they retain the advantages of connecting the chair top to a delivery system, they are not associated with known methods. The user may remove the device from the delivery system, for example by removing a release wire, top cap, etc. This eliminates any additional steps required to remove the

Claims

1. 1. A medical device delivery apparatus, comprising: a head element at a proximal end of the device; The head extends through and proximally from the medical device. configured to protrude into The head element includes one or more control loops for engaging a control loop coupled to the medical device. having an upper hook element, The one or more hook elements are axially fixed relative to the head element.

2. the one or more hook elements face forward; A free end of the one or more hook elements is oriented toward the proximal end of the head element. The apparatus of claim 1 , wherein the first and second electrodes extend from the first and second electrodes to the first and second electrodes.

3. The device of claim 1 or 2, wherein the head element has two hook elements.

4. 4. The method of claim 3, wherein the hook elements are provided on diametrically opposite sides of the head element. Device.

5. The one or more hook elements extend proximally to define a longitudinal profile of the head element.

5. The device of claim 1 , wherein the first and second electrodes project radially outwardly from the first and second electrodes.

6. 6. The method of claim 1, wherein the one or more hook elements are provided at a distal end of the head element.

13. The device according to any one of claims 1 to 12.

7. The one or more hook elements each have the shape of an angled slot, open at a proximal end and distal A device according to any one of claims 1 to 6, which is closed at its ends.

8. The apparatus of claim 7 , wherein each slot has a tapered profile.

9. the head element comprises a head body and a head plate; The head plate is connected to a distal end of the head body, and the head body and the The one or more hook elements are defined between a head plate and the head plate.

13. The apparatus described in claim 1.

10. the head body is chamfered at a distal end of the head body, The device of claim 9, further comprising a hook element.

11. Any of claims 1 to 10, further comprising one or more attachment points for ends of the control loop.

3. The device according to claim 1 .

12. The one or more attachment points are provided on the head element proximal to the one or more hook elements. The apparatus of claim 11 .

13. 4. The method of claim 3, wherein the one or more hook elements are movable between a deployed position and a non-deployed position.

13. The apparatus according to any one of 1 to 12.

14. the one or more hook elements are pivotable between the deployed and undeployed positions. The apparatus of claim 13.

15. The one or more hook elements are substantially flush with the longitudinal profile of the device.

14. The device of claim 13, wherein the device is retractable so as to

16. The one or more hook elements are configured such that rotation of the head element is controlled by the one or more hook elements.

2. The method of claim 1, wherein the control loop is profiled to facilitate disengagement of any control loops engaged by the 16. An apparatus according to any one of claims 1 to 15.

17. the one or more hook elements include an angled portion having a radially extending portion; 17. The method of claim 16, wherein the radially extending portion is configured to engage a control loop. Equipment.

18. to align the one or more hook elements with one or more eyelets of a medical device.

18. Apparatus according to claim 16 or 17, further comprising alignment means for:

19. 1. A medical device deployment system for deploying a medical device, comprising: The deployment system is a medical device delivery apparatus having a head element at a proximal end of the apparatus; The head extends through and proximally from the medical device. configured to protrude into The head element includes one or more control loops for engaging a control loop coupled to the medical device. having an upper hook element, The one or more hook elements are axially secured to the head element. Vice deployment system.

20. A medical device using the delivery device or deployment system according to any one of claims 1 to 19.

1. A method of deploying a chair, the method comprising: The delivery device is passed through the interior of the medical device and protrudes from the proximal end of the medical device. and One or more control loops are used to control one or more hooks of the medical device and the delivery apparatus. and advancing the device to a deployment site; deploying the medical device at the site; and retracting the delivery device. the one or more control loops are released from the one or more hook elements; The one or more hook elements are axially fixed relative to the head element.

21. The one or more control loops are attached to the head element of the delivery device, and the medical The medical device is then passed through one or more eyelets and then through one or more hooks.

21. The method of claim 20, wherein the wire passes around an element and then again through the one or more eyelets. How to.

22. The one or more control loops are attached to the medical device and the one or more hooks 21. The method of claim 20, further comprising passing around a clamping element.

23. the medical device having an undulating proximal end profile; the one or more control loops are attached to a proximal peak of the medical device.

23. The method according to item 22.

24. The one or more hook elements move to facilitate disengagement of the one or more control loops. The method of claim 20.

25. The one or more hook elements pivot rearward to facilitate disengagement of the one or more control loops. The method of claim 24, further comprising:

26. The head element rotates about a longitudinal axis of the head element to move the one or more control 21. The method of claim 20, further comprising facilitating release of the loop.

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