MEDICANT DELIVERY DEVICE
An example medical instrument for creating tracks within target tissue. Medicants could be injected into these tracks for diffusion into the surrounding tissue. An exemplary medical device includes a first tissue penetrating device, a second tissue penetrating device and a handle. The handle includes a first component connected to the first tissue penetrating device and a second component connected to the second tissue penetrating device. When the second component is at a first position relative to the first component, the second tissue penetrating device is in a non-track creation configuration. When the second component is at a second position relative to the first component, the second tissue penetrating device is in a track creation configuration. The second tissue penetrating device is slidably received within the first tissue penetrating device.
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This application claims the benefit of U.S. Provisional Application No. 62/895,337 filed 3 Sep. 2019, the contents of which are hereby incorporated by reference.
This application is a continuation of U.S. application Ser. No. 16/184,231 filed 8 Nov. 2018, the contents of which are hereby incorporated by reference.
BACKGROUNDThere are several medical situations where it is desired to deliver substances by injection to a relatively large volume of tissue. If a substance is delivered by a single point injection, the problems that may arise are (a) the substance cannot spread throughout the volume in sufficient time; (b) too much dilution may occur during the spreading; (c) the distribution of the substance within the volume may be very inhomogeneous; and (d) unwanted spreading to regions away from the target volume may occur. One solution to this problem is to give smaller injections at several sites within the target volume. This approach has at least a few disadvantages: (a) multiple needle stab wounds are created; (b) accuracy of placement is limited; and (c) the time for the procedure may be increased.
SUMMARYThe embodiments shown relate to an improved hypodermic needle and fluid injection device.
The embodiments shown an example medical instrument for creating tracks within target tissue. Medicants could be injected into these tracks for diffusion into the surrounding tissue.
Further features, advantages, and areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. In the drawings:
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.
The actuator component 24 allows a user to extend a distal end of the needle distally from a distal end of the sheath. Force applied by the user to the actuator component 24 translates into a force at the distal end of the needle, thus allowing for penetration of the needle into target tissue (e.g., lesion or tumor).
A stylet extension mechanism (shown by example in
As shown in
Once the needle 40 has been positioned adjacent to previously identified target tissue with the help of the endoscope 12, the actuator component 24 is advanced distally causing the needle 40 to penetrate the target tissue 70 (
In one embodiment, the prongs 52 have edges sharp enough to cut tissue. Thus, when the needle 40 is rotated, the sharp edges of any protruding prongs 52 will cut surrounding tissue.
In one embodiment, the distal plug 54 and the tip 44 are configured such that when the distal plug 54 is forced against the interior of the tip 44, the distal plug 54 rotates into proper alignment so that the prongs 52 rotate to align with the slots 48. This is considered a clocking mechanism. Other clocking mechanisms can be used.
In one embodiment, as shown in
In one embodiment, a stylet knob includes a counterbore with a spring. When the knob rests on the luer at the proximal end of the device, a distal tip of the stylet attached to the knob lies within the distal end of the needle. When the spring is compressed by a distal force applied by a user to the stylet knob, the distal force causes the prongs of the stylet to extend out of slots at the distal end of the needle.
In one embodiment, as shown in
In another embodiment, the steps of deploying the coil 102 and retracting the coil 102 into the target tissue 106 is repeated one or more times before the deployment of the treatment solution with the needle 100 being at a different position within the target tissue 106. The device shown in
The description is merely exemplary in nature and variations that do not depart from the gist of the embodiments are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims
1. A medical device comprising:
- a first tissue penetrating device;
- a second tissue penetrating device configured to extend from the first penetrating device, in an extended state the second tissue penetrating device forms a coil, in a retracted state the second tissue penetrating device conforms to the first tissue penetrating device; and
- a handle comprising: a first component connected to the first tissue penetrating device; a second component connected to the second tissue penetrating device; and a fluid delivery component configured to allow fluid to pass into the first tissue penetrating device, wherein when the second component is at a first position relative to the first component, the second tissue penetrating device is in an undeployed configuration, wherein when the second component is at a second position relative to the first component, the second tissue penetrating device is in a deployed configuration.
2. The medical device of claim 1, wherein the first and second tissue penetrating devices are configured to repeatedly allow the second tissue penetrating device to extend from and retract into the first tissue penetrating device.
3. A method comprising:
- a) inserting a hollow needle into a target;
- b) deploying a coil from within the hollow needle;
- c) retracting the coil back into the hollow needle; and
- d) advancing medicant solution through the hollow needle to the target.
4. The method of claim 3, further comprising:
- before d) performing the following one or more times; at least one of retracting or advancing the hollow needle into a different location of the target; and repeating b) and c).
5. The method of claim 3, wherein the coil is in a non-coiled configuration when within the hollow needle.
Type: Application
Filed: Sep 3, 2020
Publication Date: Dec 24, 2020
Applicant: Gyrus ACMI, Inc. (Southborough, MA)
Inventors: Madeline C. Graham (Redmond, WA), Hugo X. Gonzalez (Woodinville, WA), Jason T. Panzenbeck (Seattle, WA)
Application Number: 17/011,026