Patent Application
20180161065
The present application is a non-provisional patent application claiming priority to European Patent Application No. 16202828.6, filed Dec. 8, 2016, the contents of which are hereby incorporated by reference.
The present disclosure relates to surgical insertion devices for implanting an electronic device into body tissue. This electronic device comprises integrated circuits, microelectromechanical systems (MEMS), interconnect boards, or a combination thereof. These electronic devices may be sensory devices.
When devices are implanted in body tissue, it is important to perform this implantation with minimal damage to the tissue. Damaged tissue will lead to more difficult wound healing and more scar tissue development. Avoiding tissue damage upon device implantation is especially important if this device contains sensors which need to be in direct contact with the local tissue. If the tissue adjacent to the sensors is damaged, formation of neighboring scar tissue may limit, e.g., the registration of signals by the sensors.
Current procedures for implanting devices, e.g., sensory devices, into body tissue take this effect into account. Hence, surgeons will avoid making a large incision and will simply insert the device into the body tissue.
An adjusted procedure can be used. A small incision is made and a guiding tool is used to position the sensory device into the body tissue. Typically the to-be-implanted device is located inside this guiding tool. When the guiding tool is at the correct position in the body tissue, the to-be-implanted device is pushed out of the guiding tool. After placement of the device in the body tissue, the guiding tool is removed from the body tissue. Since the guiding tool is larger than the to-be-implanted device, the incision made is often slightly larger than the size of the implant device. Moreover, it might prove difficult to precisely position the to-be-implanted device in the body tissue by using a guiding tool. Furthermore, not all implant devices are suitable for this implantation procedure.
Another procedure for insertion of an implant device uses an implant device having attached to it a surgical suture with a needle. First, the needle is inserted into the body tissue at the desired location and then pushed through the body tissue. Using the suture, the implant device is pulled into the body tissue until the implant device is positioned at the predetermined location in the body tissue. Then the suture with the needle is cut and removed from the device implant. This procedure is particularly suited for narrow, but long, cylindrical shaped implant devices. Such implant devices may be made conical to allow a smoother insertion into the body tissue when pulling at the suture. However, pulling the implant device into the body tissue may cause some tissue damage, as the implant device itself is typically substantially larger than the needle. Furthermore, not all implant devices are fit for insertion using this implant procedure. Depending on the implant device application, when implanted, the implant device must be oriented towards selected tissue to ensure correct sensing thereof. However, this implantation technique does not allow precise control of the orientation of the implant device when inserting the implant device into the body tissue.
Hence, there is a need for a surgical insertion device that allows for reduction of the damage to body tissue when used for inserting an implant device. In example embodiments, this insertion device allows inserting implant devices with an arbitrary shape. Furthermore, this insertion device provides improved control over the orientation and/or position of the implant device when in the body tissue.
A surgical insertion device, comprising an elongated central flat region tapering from one distal end having a device area, configured to receive an electronic device, towards the opposite distal end having a sharp tip. The central flat region, the sharp tip and the device area can be integral with each other. Alternatively, the sharp tip and/or the device area are attached to the central flat region. The insertion device may have at least one opening adjacent to the device area. Optionally, barbs can be present, at least at one side, near the maximal with (W2) of the insertion device, i.e., near the device area or device holder. An electronic device is attached to it at the distal end opposite to the sharp tip, in particular when in use. This electronic device can be embedded in the insertion device, e.g., by means of packaging the electronic device. This electronic device can be at least one electrode, electrically connected to another electronic device, positioned more remote from the sharp tip.
The above, as well as additional, features will be better understood through the following illustrative and non-limiting detailed description of example embodiments, with reference to the appended drawings.
The drawings described are only schematic and are non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes. The dimensions and the relative dimensions do not correspond to actual reductions to practice of the disclosure. In the different figures, the same reference signs refer to the same or analogous elements.
All the figures are schematic, not necessarily to scale, and generally only show parts which are necessary to elucidate example embodiments, wherein other parts may be omitted or merely suggested.
Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings. That which is encompassed by the claims may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example. Furthermore, like numbers refer to the same or similar elements or components throughout.
Moreover, the terms top, bottom, over, under and the like in the description and the claims are used for descriptive purposes and not necessarily for describing relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the disclosure described herein are capable of operation in other orientations than described or illustrated herein.
It is to be noticed that the term “comprising”, used in the claims, should not be interpreted as being restricted to the means listed thereafter; it does not exclude other elements or steps. It is thus to be interpreted as specifying the presence of the stated features, integers, steps or components as referred to, but does not preclude the presence or addition of one or more other features, integers, steps or components, or groups thereof. Thus, the scope of the expression “a device comprising means A and B” should not be limited to devices consisting only of components A and B. It means that with respect to the present disclosure, the only relevant components of the device are A and B.
Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment, but may. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner, as would be apparent to one of ordinary skill in the art from this disclosure, in one or more embodiments.
Similarly it should be appreciated that in the description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this disclosure.
Furthermore, while some embodiments described herein include some but not other features included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the disclosure, and form different embodiments, as would be understood by those in the art. For example, in the following claims, any of the claimed embodiments can be used in any combination.
As illustrated by
Although the surgical insertion device 1 can be manufactured integrally, whereby the sharp tip 3, the center part or ribbon 2 and the device area 4 are formed together, the disclosure is not limited thereto. Instead of having the insertion device 1 formed as one piece, one can also assemble the insertion device 1 by attaching to the center part 2 made of a first material or set of material(s), the sharp tip 3 made of a second material or second set of material(s) selected to provide to provide the required sharpness and mechanical strength exerted upon the insertion device 1 when pushing the tip through the body tissue. The device area 4 can be formed of this first material, e.g., formed integral with the central part 2 or, when formed from another material or set of material(s), can be attached to the center part 2. In the latter case it may be easier to remove, after insertion, that part 2, 3 of the insertion device 1 that is not supporting the to-implanted-device 5.
One can also embed the to-be-implanted device 5 in the material(s) forming the insertion device 1. One can position the to-be-implanted device 5 on the device area 4 and then apply a material covering this device 5. As an alternative, the layers used to package the to-be-implanted device 5 can be patterned to extend in sideward direction, thereby forming the device area 4, and in lateral direction, thereby forming the center part 2, optionally also forming the sharp tip 3.
One or more openings 6 can be provided in the surgical insertion device 1, adjacent to location where the to-be-implanted device will be attached to the insertion device 1. These openings can be used to secure the part of the insertion device 1, containing the to-be-implanted device 5, to the tissue, e.g., by using surgical suture.
The device-to-be-implanted 5 can be an integrated circuit, a microelectromechanical systems (MEMS), an interconnect board, or a combination thereof. These electronic devices may be sensory devices. Such a device 5 can, e.g., be a board containing a metal pattern with functionalized electrodes interacting with the body tissue and/or body liquids to be examined, whereby the metal pattern allows accessing these electrodes and providing an interconnect to other electronic systems 10 in the body tissue.
This insertion device 1 is particularly suitable for flat devices 5, which need maximal contact with local tissue. The procedure consists of insertion the device 5 by pulling at a thin, flat implantation ribbon 2. This ribbon 2 is attached, e.g., glued, at one side to the to-be-implanted device 5. Alternatively the ribbon 3 is fabricated as part of the to-be-implanted device 5. The other part of the ribbon 2 is attached to a miniaturized ‘knife/needle’ structure 3. This ribbon 2 can be made from a strong biocompatible polymer such as poly-imide. The knife/needle 3 is a very thin hard piece with a triangular or arrow like shape, made from a hard material such as SST (stainless steel), in order to allow to cut through tissue accurately with minimal tissue damage. The knife/needle 3 has a sharp point at its tip and is manipulated using a pair of tweezers or a surgical needle holder in order to allow puncturing of the tissue at the desired location for the implant. After pushing the knife/needle 3 through the tissue, the ribbon 2 attached to the knife/needle 3 can be pulled through the tissue until the device 5 is located in its desired position. The ribbon 2 is flat and will pass through the tissue in the same orientation as the knife/needle 3, and hence the device 5 will be inserted into the tissue in exact the same and hence well controlled orientation as of the ribbon 2. Especially when the device 5 is flat, this insertion will take place with minimum tissue damage, since the knife/needle 3 and ribbon 2 are all flat and pass through the tissue in the same way. If the device 5, which is implanted, is larger than the ribbon 2 and knife/needle 3, then this device 5 may have a triangular shape having its tip pointing towards the knife/needle structure 3 to allow a smooth insertion into the incision in the body tissue made by the knife/needle 3. The implantation ribbon 2 can be attached to the device 5 after fabrication of this device 5, or can be fabricated simultaneously with the device 5 when shaping the polymers which are encapsulating the device 5. All used materials should be selected with the required biocompatibility properties for this medical application. After implantation in the body tissue, the device 5 needs to remain at its desired position. This can be realized by using a small saw tooth profile fabricated at the sides of the insertion device 1 adjacent to the device 5. The saw tooth profile should be designed to allow for easy insertion, but to stop a possible sliding back of the implant device 5 after the insertion and positioning. An additional suture at the tip of the implant device 5 can be used to guarantee a stable long term implant positioning. After this procedure, the guiding ribbon 2 can be cut and removed together with the tip of the insertion device 1, thereby leaving the implant device 5 and a small corresponding part of the insertion device 1 in the body tissue.
Additionally, the part 4 of the insertion device 1 containing the electrodes 5 can be further fixed by a suture 9 through the tissue 31, 32, 33 and the fixation hole 6. The device 10 remains in electrical contact with the tissue 31, 32, 33 to-be-examined via the electrodes 5 which are in electrically connected to the device 10 via conductive lines on the insertion device 1.
While some embodiments have been illustrated and described in detail in the appended drawings and the foregoing description, such illustration and description are to be considered illustrative and not restrictive. Other variations to the disclosed embodiments can be understood and effected in practicing the claims, from a study of the drawings, the disclosure, and the appended claims. The mere fact that certain measures or features are recited in mutually different dependent claims does not indicate that a combination of these measures or features cannot be used. Any reference signs in the claims should not be construed as limiting the scope.
| Number | Date | Country | Kind |
|---|---|---|---|
| 16202828.6 | Dec 2016 | EP | regional |
