Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
PROVISIONAL SPECIFICATION
(Section 10 and Rule 13)

TITLE OF THE INVENTION
IMPLANT EXTRACTOR ASSIST DEVICE

APPLICANT:
Meril Corporation (I) Private Limited, an Indian company of the address Survey No. 135/139, Muktanand Marg, Bilakhia House, Pardi, Vapi, Valsad-396191 Gujarat, India.

The following specification particularly describes the invention and manner in which it is to be performed:

FIELD OF INVENTION
[1] The present disclosure relates to a medical device. More particularly, the present disclosure relates to an implant extractor assist device.
BACKGROUND OF INVENTION
[2] In-bone implants, after a long period of implantation, undergo osteointegration. Osteointegration is a process of bone ingrowth on the surface of the implant. Osseointegration is critical for implant stability and provides rigid fixation of the artificial implant with the bone.
[3] However, during revision surgery, the old implant is extracted and replaced with a new implant. Due to osteointegration of the old implant, the conventionally available extraction devices used to extract the implant, fail to provide safe and easy extraction of the old implant. Further, the extraction procedure may sometimes cause medical complications as the conventional extraction device can damage the bone and nearby tissues.
[4] Thus, there arises a need for a device that overcomes the problems associated with the conventional devices.
SUMMARY OF INVENTION
[5] Particular embodiments of the present disclosure are described herein below with reference to the accompanying drawings, however, it is to be understood that the disclosed embodiments are mere examples of the disclosure, which may be embodied in various forms. Well-known functions or constructions are not described in detail to avoid obscuring the present disclosure in unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.
[6] The present disclosure relates to a device including at least one arm. The arm extending from a proximal end to a distal end. The arm including at least a neck, a body and a plurality of elongate members. The neck is provided with at least one hole. The hole is configured to receive a connector having a plurality of optical fiber to deliver a laser to the arm. The body is coupled to the neck. The plurality of elongate members extends from the body towards the distal end. The plurality of elongate members at least partially encircles an outer surface of an implant. At least a portion of an outer surface of the plurality of elongate members is provided with a plurality of first pores fluidically coupled to the hole. The plurality of first pores configured to emit the laser.
BRIEF DESCRIPTION OF DRAWINGS
[7] The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the apportioned drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the disclosure is not limited to specific methods and instrumentality disclosed herein. Moreover, those in the art will understand that the drawings are not to scale.
[8] Fig. 1 depicts an assembled view of a device 100, according to an embodiment of the present disclosure.
[9] Fig. 1a depicts a plurality of optical fibers 113b1 of the device 100, according to an embodiment of the present disclosure.
[10] Fig. 2 depicts a side view of a first arm 110 of the device 100, according to an embodiment of the present disclosure.
[11] Fig. 2a depicts a perspective view of the first arm 110 of the device 100, according to an embodiment of the present disclosure.
[12] Fig. 2b depicts an enlarged view of a portion of the first arm 110 of the device 100, according to an embodiment of the present disclosure.
[13] Fig. 3 depicts a side view of a second arm 120 of the device 100, according to an embodiment of the present disclosure.
[14] Fig. 3a depicts a perspective view of the second arm 120 of the device 100, according to an embodiment of the present disclosure.
[15] Fig. 3b depicts an enlarged view of a portion of the second arm 120 of the device 100, according to an embodiment of the present disclosure.
[16] Fig. 4 depicts the device 100 along with an implant 200 and a bone 1, according to an embodiment of the present disclosure.
[17] Fig. 4a depicts the device 100 with the implant 200, according to an embodiment of the present disclosure.
[18] Fig. 4b depicts the device 100 with the implant 200, according to an embodiment of the present disclosure.
DETAILED DESCRIPTION OF THE DRAWINGS
[19] Prior to describing the invention in detail, definitions of certain words or phrases used throughout this patent document will be defined: the terms "include" and "comprise", as well as derivatives thereof, mean inclusion without limitation; the term "or" is inclusive, meaning and/or; the phrases "coupled with" and "associated therewith", as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have a property of, or the like. Definitions of certain words and phrases are provided throughout this patent document, and those of ordinary skill in the art will understand that such definitions apply in many, if not most, instances to prior as well as future uses of such defined words and phrases.
[20] Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment, but mean “one or more but not all embodiments” unless expressly specified otherwise. The terms “including,” “comprising,” “having,” and variations thereof mean “including but not limited to” unless expressly specified otherwise. An enumerated listing of items does not imply that any or all of the items are mutually exclusive and/or mutually inclusive, unless expressly specified otherwise. The terms “a,” “an,” and “the” also refer to “one or more” unless expressly specified otherwise.
[21] Although the operations of exemplary embodiments of the disclosed method may be described in a particular, sequential order for convenient presentation, it should be understood that the disclosed embodiments can encompass an order of operations other than the particular, sequential order disclosed. For example, operations described sequentially may in some cases be rearranged or performed concurrently. Further, descriptions and disclosures provided in association with one particular embodiment are not limited to that embodiment, and may be applied to any embodiment disclosed herein. Moreover, for the sake of simplicity, the attached figures may not show the various ways in which the disclosed system, method, and apparatus can be used in combination with other systems, methods, and apparatuses.
[22] Furthermore, the described features, advantages, and characteristics of the embodiments may be combined in any suitable manner. One skilled in the relevant art will recognize that the embodiments may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments. These features and advantages of the embodiments will become more fully apparent from the following description and apportioned claims, or may be learned by the practice of embodiments as set forth hereinafter.
[23] The present disclosure relates to an implant extractor assist device (or device). The device is used to extract stem-like prosthesis, for example, a femoral implant. The device of the present disclosure helps to loosen at least a portion of an implant by breaking osteointegration on application of a laser through the device.
[24] Now referring to the figures, Fig. 1 depicts an assembled view of a device 100. The device 100 includes at least one arm. In an exemplary embodiment, as shown in Fig. 1, the device includes two arms, namely, a first arm 110 and a second arm 120. The arms are designed to at least partially encircle a portion of an implant 200. In an exemplary embodiment, as shown in Fig. 1, the arms of the device 100 at least partially encircles a proximal portion of a femoral stem implant (or implant) 200.
[25] The device 100 (and the arms of the device 100) extends between a proximal end 100a and a distal end 100b. As shown in Fig. 1, a distal portion of the device 100 is shaped to closely hug an outer surface of the implant 200.
[26] Fig. 2 depicts the first arm 110 of the device 100. In an exemplary embodiment, as shown in Fig. 1, the first arm 110 is configured to be at least partially inserted towards the greater trochanter area of the implant 200. The first arm 110 is made of a material including, but not limited to, 17 4PH stainless steel, titanium, cobalt-chromium (Co-Cr), stainless steel, etc. In an exemplary embodiment, the first arm 110 is made of 17 4PH stainless steel.
[27] The first arm 110 includes at least a head 111, a neck 113, a body 115 and a plurality of elongate members 117. The head 111 is disposed towards the proximal end 100a of the device 100 and the elongate members 117 are disposed towards the distal end 100b of the device 100. The neck 113 couples the head 111 to the body 115. And, the body 115 couples the neck 113 to the elongate members 117.
[28] The head 111 has a pre-defined shape including, but not limited to, circular disc, semi-circular disc, etc. In an exemplary embodiment, as shown in Fig. 2a, the head 111 is shaped like a semi-circular disc. The head 111 helps the user to hold and manipulate the device 100. The head 111 may also be used to hammer-on the device 100 to insert the device 100 between a bone and the implant 200.
[29] The neck 113 may have a pre-defined shape including, but not limited to, cuboidal, cubical, cylindrical, etc. In an exemplary embodiment, as shown in Fig. 2a, the neck 113 is cuboidal in shape.
[30] The neck 113 is provided with a hole 113a. As shown in Fig, 1, the hole 113a is configured to be removably coupled to a connector 113b. The connector 113b maybe made of a material including, but not limited to, 17 4PH stainless steel, titanium, Co-Cr, stainless steel. In an exemplary embodiment, the connector 113b is made of 17 4PH stainless steel.
[31] The connector 113b includes a plurality of optical fibers 113b1 (as shown in Figs. 1 and 1a). The optical fibers 113b1 may be made medical-grade polymers (for example, polyether ether ketone (PEEK)), biocompatible glasses (for example, fused silica), fibers (for example, silica fibers) or a combination thereof. In an exemplary embodiment, the optical fibers 113b1 are made of silica fibers. The optical fibers 113b1 help to deliver a laser (or laser beam) within the first arm 110 from a pre-defined laser source (not shown).
[32] The body 115 has a shape at least partially corresponding to an upper surface of the implant 200.
[33] The elongate members 117 extend away from the body 115 towards the distal end 100b of the device 100. The elongate members 117 may at least partially encircle a portion of the implant 200. In an exemplary embodiment, as shown in Figs. 1 and 2a, the first arm 110 is provided with three elongate members 117 that at least partially encircles a proximal portion of the implant 200. Towards the proximal end 100a, the elongate members 117 are coupled to each other via the body 115.
[34] As shown in Figs 2a and 2b, at least a portion of an outer surface of the elongate members 117 are provided with a plurality of first pores 118a. The first pores 118a are laterally facing openings.
[35] The first pores 118a are fluidically coupled to the hole 113a of the neck 113 from within the device 100. In an exemplary embodiment, the first pores 118a are fluidically coupled to the hole 113a via a plurality of lumens (not shown) disposed within the first arm 110. Other functionally equivalent structure to couple the plurality of first pores 118a with the hole 113a are within the scope of the teachings of the present disclosure.
[36] Additionally or optionally, towards the distal end 100b, the elongate members 117 are coupled to each other via at least one band 117a. As shown in Figs 2a and 2b, at least a portion of an outer surface of the band 117a is provided with a plurality of second pores 118b. The second pores 118b may be openings that extend axially. In an exemplary embodiment, as shown in Fig. 2a, the first arm 110 is provided with one band 117a having second pores 118b that face towards the distal end 100b of the device 100.
[37] The second pores 118b are fluidically coupled to the hole 113a of the neck 113 from within the device 100. In an exemplary embodiment, the second pores 118b are fluidically coupled to the hole 113a via a plurality of lumens (not shown) disposed within the first arm 110. Other functionally equivalent structure(s) to couple the plurality of second pores 118b with the hole 113a are within the scope of the teachings of the present disclosure.
[38] The first pores 118a and the second pores 118b are configured to produce the laser that is delivered to the first arm 110 via the connector 113b.
[39] Once the first arm 110 is at least partially inserted between the bone and the implant 200, the laser is delivered to the first arm 110 via optical fibers 113b1 disposed within the connector 113b. The laser is emitted by the first arm 110 through the plurality of first pores 118a and the second pores 118b to break osteointegration between the bone and the implant 200. The action of the laser loosens at least the proximal portion of the implant 200 such that the implant 200 can be easily extracted using a conventional implant extractor (not shown).
[40] In an exemplary embodiment, the laser is programmed to only break osteointegration and not cause harm to the surrounding bone.
[41] The second arm 120 is depicted in Fig. 3. Structurally and functionally, the second arm 120 is substantially similar to the first arm 110. In an exemplary embodiment, as shown in Fig. 1, the second arm 120 is configured to be at least partially inserted towards the trochanter area of the implant 200.
[42] Similar to the first arm 110, the second arm 120 includes a head 121, a neck 123, a body 125, and a plurality of elongate members 127. The neck 123 is provided with a hole 123a. The hole 123a is configured to receive a connector 123b having a plurality of optical fibers (not shown).
[43] In an exemplary embodiment, as shown in Figs. 3 and 3a, the second arm 120 is provided with two elongate members 127. The elongate members 127 are not provided with any pores.
[44] In an alternate embodiment, not shown, the elongate members 127 are provided with a plurality of first pores.
[45] Towards the distal end 100b, the elongate members 127 are coupled to each other via a band 127a. In an exemplary embodiment, as shown in Fig. 3a, the band 127a is axially curved at the distal end 100b.
[46] As shown in Figs. 3a and 3b, the band 127a is provided with a plurality of second pores 128b. Due to the curved end of the band 127a, at least a few of the second pores 128b are at an angle compared to a longitudinal axis (not shown) of the device 100.
[47] Fig. 4 depicts the implant 200 within a bone 1. As shown in Fig. 4, the first arm 110 and the second arm 120 are inserted between the bone 1 and an outer surface of the implant 200. In an exemplary embodiment, as shown in Fig. 4, the first arm 110 is inserted towards the greater trochanter area of the implant 200 and the second arm 120 is inserted towards the trochanter area of the implant 200. Fig. 4a further shows the assembly of the implant 200 and the arms of the device 100 without the bone 1.
[48] Fig. 4b depicts the assembly of the implant 200 and the device 100 after the arms of the device 100 are inserted completely in between the bone and the outer surface of the implant 200. After the arms of the device 100 are inserted, the device 100 is configured to emit the laser out of the first pores 118a and the second pores 118b/128b (as descried above) to break osteointegration between the bone 1 and the implant 200. Thereafter, the arms of the device 100 are recovered from around the implant 200 and the implant 200 is easily extracted from the bone 1 using a conventional extractor.
[49] The scope of the invention is only limited by the appended patent claims. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials, and configurations described herein are meant to be exemplary and that the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the teachings of the present invention is/are used. , Claims:WE CLAIM:
1. A device (100) comprising:
a. at least one arm extending from a proximal end (100a) to a distal end (100b) including:
i. a neck (113, 123) provided with at least one hole (113a, 123a), the hole (113a, 123a) is configured to receive a connector (113b, 123b) having a plurality of optical fibers (113b1) to deliver a laser to the arm;
ii. a body (115, 125) coupled to the neck (113, 123); and
iii. a plurality of elongate members (117, 127) extending from the body (115, 125) towards the distal end (100b), the plurality of elongate members (117, 127) at least partially encircles an outer surface of an implant (200), at least a portion of an outer surface of the plurality of elongate members (117, 127) provided with a plurality of first pores (118a) fluidically coupled to the hole (113a, 123a), the plurality of first pores (118a) configured to emit the laser.
2. The device (100) as claimed in claim 1, wherein the plurality of elongate members (117, 127) of the at least one arm are coupled to each other via a band (117a, 127a).
3. The device (100) as claimed in claim 2, wherein at least a portion of an outer surface of the band (117a, 127a) is provided with a plurality of second pores (118b, 128b) fluidically coupled to the hole (113a, 123a).
4. The device (100) as claimed in claim 2, wherein the band (127a) is axially curved towards the distal end (100b).
5. The device (100) as claimed in claim 1, wherein a head (111, 121) is disposed at the proximal end (100a) coupled to the neck (113, 123).
6. The device (100) as claimed in claim 1, wherein the arm is made of a material including at least one of 17 4PH stainless steel, titanium, cobalt-chromium (Co-Cr), or stainless steel.
7. The device (100) as claimed in claim 1, wherein the connector (113b, 123b) is made of a material including at least one of 17 4PH stainless steel, titanium, cobalt-chromium (Co-Cr), and stainless steel.
8. The device (100) as claimed in claim 1, wherein the optical fiber (113b1) is made of a material including at least one of medical-grade polymers, biocompatible glasses, fibers or a combination thereof.
9. The device (100) as claimed in claim 1, wherein the optical fiber (113b1) is made of a material including at least one of polyether ether ketone (PEEK), fused silica, silica fibers or a combination thereof.
10. The device (100) as claimed in claim 1, wherein the at least one arm includes a first arm (110) and a second arm (120).