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

1. TITLE OF THE INVENTION:
RESECTION DEVICE

2. APPLICANT:
Meril Healthcare Pvt. Ltd., an Indian company of the Survey No. 135/139, Bilakhia House, Muktanand Marg, Chala, Vapi- 396191, Gujarat, India.

The following specification particularly describes the invention and the 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 a resection device.
BACKGROUND OF INVENTION
[2] Generally, in adults, the knee joint is traumatized due to heavy physical activities which involves jumping, running, lifting, etc. causing pain and/or limited mobility. In old people the knee pain may be a result of aging, repeated stress, injury and/or diseases such as osteoarthritis, rheumatoid arthritis etc.
[3] To restore and treat a traumatized knee, an individual is advised to undergo a surgical procedure known as total knee arthroplasty (TKA). In the said procedure, at least a portion of the natural knee joint is replaced with an implant.
[4] The said procedure of knee replacement surgery involves preparing the tibial bone by resecting a portion or the entire tibial plateau at a specific level (height) and angle. Before resecting the tibial plateau, various resection instruments are used to guide and place the cuts made to the bone for optimal performance of the implant. Conventional resection instruments used in the process of knee replacement surgeries are designed to measure bone gaps and bone landmarks for resecting the tibial plateau.
[5] However, conventional resection instruments lack precision and fail to provide accurate customization of the tibial cut during the surgical procedure.
[6] Hence, there arises a need of an instrument that overcomes the problems associated with the conventional instruments.
SUMMARY OF INVENTION
[7] 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.
[8] The present disclosure relates to a device including a body, a guide block and a foot. The body includes a lumen. The guide block is at least partially disposed within the lumen of the body. The guide block is configured to axially slide within the lumen of the body. The foot is coupled to the body. The foot has one or more adapters. The guide block is interchangeably coupled to one of an arm and an offset arm. The arm has an elongate member and a curved member. The elongate member is slidably and rotatably coupled to the guide block. The curved member includes a first tip defining a first distance from the one or more adapters of the foot. The first distance is manipulated by axially sliding the guide block within the lumen of the body. The offset arm has an elongate member and a curved member. The elongate member is slidably and rotatably coupled to the guide block. The curved member includes a second tip defining a second distance from the one or more adapters of the foot. The second distance is manipulated by axially sliding the guide block within the lumen of the body. The second tip being physically offset from the first tip.
BRIEF DESCRIPTION OF DRAWINGS
[9] 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.
[10] Fig. 1 depicts a device 100, according to one or more embodiment of the present disclosure.
[11] Fig. 2 depicts an exploded view of the device 100, according to one or more embodiment of the present disclosure.
[12] Fig. 2a depicts a cross-sectional view of the device 100, according to one or more embodiment of the present disclosure.
[13] Fig. 3 depicts the device 100 with an arm 140, according to one or more embodiment of the present disclosure.
[14] Fig. 3a depicts the device 100 with an offset arm 240, according to one or more embodiment of the present disclosure.
[15] Fig. 3a1 depicts the offset arm 240, according to one or more embodiment of the present disclosure.
[16] Fig. 3b depicts the device 100 with the offset arm 240, according to one or more embodiment of the present disclosure.
[17] Fig. 4 depicts a method 300 of using the device 100, according to one or more embodiment of the present disclosure.
[18] Fig. 4a depicts a slotted adapter 130a of the device 100 placed adjacent to a tibial plateau 11, according to one or more embodiment of the present disclosure.
[19] Fig. 4a1 depicts an unslotted adapter 130b of the device 100 placed adjacent to a tibial plateau 11, according to one or more embodiment of the present disclosure.
[20] Fig. 4b depicts the slotted adapter 130a of the device 100 adjacent to a resected tibial plateau 11, according to one or more embodiment of the present disclosure.
[21] Fig. 4b1 depicts the unslotted adapter 130b of the device 100 adjacent to a resected tibial plateau 11, according to one or more embodiment of the present disclosure.
[22] Fig. 4b2 depicts the unslotted adapter 130b of the device 100 adjacent to a resected tibial plateau 11, according to one or more embodiment of the present disclosure.
DETAILED DESCRIPTION OF THE DRAWINGS
[23] 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.
[24] 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.
[25] 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.
[26] 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.
[27] The present disclosure discloses a resection device (or device). In an exemplary embodiment, the device is used in knee replacement procedures to determine the dimensions of a tibial cut (with respect to a tibial plateau) for accurate placement of a knee prosthesis.
[28] Although the device is explained with the example of knee replacement procedure, the device may be used in any join replacement procedure and the same is within the scope of the teachings of the present disclosure.
[29] The device of the present disclosure provides accurate customization to the user while the device is being used in a surgical procedure as required. Thus, the device provides the user flexibility to make more precise bone resections during the surgical procedure and ensure optimum implant fit with for example, the tibial plateau.
[30] Now referring to the figures, Fig. 1 depicts an exemplary device 100. Figs. 2 and 2a depict an exploded view and a cross-sectional view of the device 100, respectively. The device 100 includes a plurality of components including but not limited to a body 110, a guide block 120, a foot 130 and an arm 140. The plurality of components of the device 100 are operationally coupled in a pre-defined manner. As shown in Fig. 1, the device 100 has a proximal end 100a, a distal end 100b, a top end 100c and a bottom end 100d.
[31] The body 110 acts as a backbone for assembling the plurality of components of the device 100. The body 110 may have a pre-defined shape including but not limited to cylindrical, rectangular, sphere, elliptical, etc. In an exemplary embodiment, as shown in Figs. 1 and 2, the body 110 is a hollow cylinder-like structure. The body 110 may be made of any metal, metal alloys or poly materials including but not limited to stainless steel, titanium, cobalt-chromium, etc. In an exemplary embodiment, the body 110 is made from 17-4PH stainless steel.
[32] The body 110 may be provided with at least one slot 111. The slot 111 may extend at least partially along a height of the body 110. In an exemplary embodiment, as shown in Figs. 1 and 2, two slots 111 extend axially on the body 110. At least one indicia 111a may be provided adjacent to the slot 111 to help a user to visually confirm a distance set/measured by the device 100 (described later). In an exemplary embodiment, as shown in Figs. 1 and 2, the indicia 111a is provided with markings ranging from “5 mm” to “13 mm”.
[33] The body 110 may be provided with at least one window 113. The window 113 may extend at least partially across a width of the body 110. In an exemplary embodiment, as shown in Fig. 1, the window 113 extends laterally on the body 110. The window 113 may be disposed either above or below the slot 111. In an exemplary embodiment, the slot 111 is disposed towards the top end 100c and the window 113 is disposed towards the bottom end 100d.
[34] As shown in Fig. 2, the body 110 is provided with a lumen 115. The lumen 115 may have a shape corresponding to a shape of the guide block 120 (described later).
[35] Additionally or optionally, the body 110 may be provided with one or more ergonomic contours 117 for easy handling of the device 100.
[36] Fig. 2 depicts the guide block 120 and Fig. 2a depicts a cross-sectional view of the guide block 120. The guide block 120 is at least partially disposed within the lumen 115 of the body 110. The guide block 120 is made of any metal, metal alloys or poly materials including but not limited to stainless steel, titanium, cobalt-chromium, etc. In an exemplary embodiment, the guide block 120 is made of 17-4PH stainless steel. The guide block 120 may include a plurality of portions. As shown in Fig. 2, the guide block 120 includes a head portion 121, a neck portion 123, a body portion 125 and a stem portion 127. Although the guide block 120 is described to have a plurality of portions, the guide block 120 may be an integral structure. Alternatively, the plurality of portions of the guide block 120 may be removably or fixedly coupled to each other.
[37] The head portion 121 of the guide block 120 is disposed outside the lumen 115 of the body 110, towards the top end 100c of the device 100. The head portion 121 may have a pre-defined shape including but not limited to cylindrical, rectangular, sphere, elliptical, etc. In an exemplary embodiment, as shown in Fig. 2, the head portion 121 is cylindrical. The head portion 121 may have a diameter of at least 1 mm. In an exemplary embodiment, the diameter of the head portion 121 is 8 mm.
[38] The neck portion 123 of the guide block 120 is disposed outside the lumen 115 of the body 110, towards the top end 100c of the device 100. The neck portion 123 may have a pre-defined shape including but not limited to cylindrical, rectangular, sphere, elliptical, etc. In an exemplary embodiment, as shown in Fig. 2, the neck portion 123 is cylindrical. A diameter of the neck portion 123 may be less than the diameter of the head portion 121. The diameter of the neck portion 123 may at least be 1 mm. In an exemplary embodiment, the diameter of the neck portion 123 is 4.5 mm. The neck portion 123 may be operationally coupled to the arm 140 of the device 100 (described later).
[39] The body portion 125 is disposed at least partially inside the lumen 115 of the body 110. The neck portion 123 is flanked by the head portion 121 (towards the top end 100c) and the body portion 125 (towards the bottom end 100d). The body portion 125 may have a diameter greater than the diameter of the neck portion 123. The diameter of the body portion 125 may at least be 1 mm. In an exemplary embodiment, the body portion 125 is 12 mm.
[40] The body portion 125 is provided with at least one pin 125a. The pin 125a is configured to slide within the slot 111 of the body 110. The movement of the pin 125a is directly proportional to the movement of the guide block 120 within the lumen 115. In an exemplary embodiment, the pin 125a moves axially within the slot 111 corresponding to the axial movement of the guide block 120 within the lumen 115 of the body 110.
[41] Additionally or optionally, as shown in Fig. 2, the pin 125a is provided with at least one pointer 125a1 that helps a user to read the position of the pin 125a with respect to the indicia 111a (described later). The pointer 125a1 may be at least one of a marking, an engraving, a protrusion, an etching, a laser marking, etc. In an exemplary embodiment, the pointer 125a1 is an ink-based marking.
[42] The stem portion 127 may be disposed within the lumen 115 of the body 110. The stem portion 127 may extend away from the body portion 125 and towards the bottom end 100d of the device 100. In an exemplary embodiment, a diameter of the stem portion 127 is less than the diameter of the body portion 125. At least a portion of the stem portion 127 may be provided with a plurality of external threads 127a.
[43] A roller 127b may be disposed within the lumen 115 of the body 110 and around the stem portion 127 of the guide block 120 such that the roller 127b at least partially protrudes out of the window 113 of the body 110 (as shown in Fig. 1). The roller 127b may be made of any metal, metal alloys or poly materials including but not limited to stainless steel, titanium, cobalt-chromium, etc. In an exemplary embodiment, the roller 127b is made of 17-4PH stainless steel. As shown in Fig. 2, the roller 127b may be provided with a plurality of internal threads 127b1 complementing the external threads 127a of the stem portion 127.
[44] The window 113 allows the user to interact with the roller 127b and rotate the roller 127b in at least one of clockwise direction and anti-clockwise direction. The rotation of the roller 127b translates to linear motion (or axial motion) of the guide block 120 within the lumen 115 of the body 110 due to the interaction of the internal threads 127b1 of the roller 127b with the external threads 127a of the stem portion 127. In an exemplary embodiment, the roller 127b is rotated in clockwise direction to move the guide block 120 towards the top end 100c of the device 100 and vice versa. In an alternate embodiment, the roller 127b is rotated in anti-clockwise direction to move the guide block 120 towards the top end 100c of the device 100 and vice versa.
[45] Although the movement of the guide block 120 is described with the help of the roller 127b, other functionally equivalent structures instead of the roller 127b are within the scope of the teachings of the present disclosure.
[46] Additionally or optionally, as shown in Fig. 2, a washer 127c is disposed adjacent the body portion 125 and around the stem portion 127 of the guide block 120. And, a resilient member 127d is disposed within the lumen 115 extending between the roller 127b and the washer 127c such that the resilient member 127d at least partially encompasses the stem portion 127 of the body 110. The washer 127c may be coupled to the body portion 125 of the guide block 120, towards the bottom end 100d of the device 100. The resilient member 127d along with the washer 127c helps to provide stability to the roller 127b and the guide block 120 within the lumen 115 of the body 110, thereby preventing any inadvertent movement of the guide block 120 within the lumen 115 of the body 110.
[47] The washer 127c may be made of any metal, metal alloys or poly materials including but not limited to stainless steel, titanium, cobalt-chromium, etc. In an exemplary embodiment, the washer 127c is made of stainless steel.
[48] As shown in Fig. 2, the roller 127b may include a groove 127b2 to couple the resilient member 127d to the roller 127b. The resilient member 127d may at least partially be disposed within the groove 127b2 of the roller 127b.
[49] The foot 130 of the device 100 is either fixedly or rotatably coupled to the body 110 towards the bottom end 100d. The foot 130 is provided with a void 131. In an exemplary embodiment, as shown in Fig. 2, the void 131 of the foot 130 couples to the body 110 by at least partially encircling the body 110 of the device 100. The foot 130 includes one or more adapters 130a, 130b. The adapters 130a, 130b are used to couple various surgical tools to perform the surgical procedure. In an exemplary embodiment, the adapters 130a, 130b are used to couple bone cutting tools to make tibial cuts on the tibial plateau.
[50] In an exemplary embodiment, as shown in Figs. 1 and 2, the foot 130 includes a slotted adapter 130a and an unslotted adapter 130b. The slotted adapter 130a is used to make an initial tibial cut. The unslotted adapter 130b is used to make an offset cut from the initial tibial cut, for example, 4 mm away from the initial tibial cut (as shown in Fig. 4b2).
[51] As shown in Fig. 1, the arm 140 of the device 100 includes an elongate member 141 and a curved member 143. The elongate member 141 and the curved member 143 may form an integral structure or may be coupled to each other. In an exemplary embodiment, the elongate member 141 and the curved member 143 forms an integral structure. The arm 140 may be made from any metal, metal alloys or poly materials including but not limited to stainless steel, titanium, cobalt-chromium, etc. In an exemplary embodiment, the arm 140 is made of 17-4PH stainless steel.
[52] The elongate member 141 includes a slot 141a and a hole 141b. The slot 141a, as depicted in Fig. 1, is disposed towards the distal end 100b of the device 100. And, the hole 141b is disposed towards the proximal end 100a of the device 100, i.e., proximal to the slot 141a. The slot 141a and the hole 141b are conjoined. The slot 141a may have a width that is greater than the diameter of the neck portion 123 of the guide block 120 but less than the diameter of the head portion 121 of the guide block 120. The said width of the slot 141a allows the arm 140 to slide along a length of the slot 141a around the guide block 120, as required by the user. The user may rotate the arm 140 around the guide block 120, while the neck portion 123 is disposed within the slot 141a, as required by the user. In other words, the elongate member 141 is slidably and rotatably coupled to the neck portion 123 of the guide block 120. In an exemplary embodiment, the user rotates the arm 140 around the guide block 120 to align the curved member 143 of the arm 140 with one of the one or more adapters 130a, 130b of the foot 130.
[53] The hole 141b may have a diameter greater than the diameter of the head portion 121 of the guide block 120. The said diameter of the hole 141b allows the user to couple and decouple the arm 140 to the guide block 120 via the head portion 121. For example, the user may insert the head portion 121 of the guide block 120 through the hole 141b of the arm 140 and slide the arm 140 around the neck portion 123 such that the neck portion 123 is disposed within the slot 141a, thus coupling the arm 140 to the guide block 120.
[54] Conversely, the arm 140 is slid around the neck portion 123 of the guide block 120 such that the head portion 121 is aligned with the hole 141b of the arm 140. The user may then pull away the arm 140 from the guide block 120, thus decoupling the arm 140 from the guide block 120.
[55] Additionally or optionally, the slot 141a is provided with one or more tension arms 141a1. The tension arms 141a1 may be disposed within the slot 141a and towards the proximal end 100a (i.e., towards the hole 141b). As shown in Figs. 1 and 2, the slot 141a is provided with two tension arms 141a1. The tension arms 141a1 provide resistance to the movement of the neck portion 123 of the guide block 120 from the slot 141a to the hole 141b. The tension arms 141a1 prevents inadvertent detachment of the arm 140 from the guide block 120 while the device 100 is in use.
[56] In an exemplary embodiment, the tension arms 141a1 are in the form of flexible overhangs configured to frictionally interact with the neck portion 123 of the guide block 120 when the neck portion 123 is disposed in between the tension arms 141a1.
[57] Additionally or optionally, the elongate member 141 is provided with a grip portion 141c. As shown in Fig. 1, the grip portion 141c is disposed proximal to the hole 141b, i.e., towards the proximal end 100a of the device 100. The grip portion 141c helps the user to interact with the arm 140 and manipulate its position with respect to the guide block 120.
[58] As shown in Fig. 1, the curved member 143 of the arm 140 is disposed distal to the elongate member 141, i.e., towards the distal end 100b of the device 100. The curved member 143 include a first tip 143a. The first tip 143a defines a first distance from the adapter(s) 130a, 130b of the foot 130. The distance is visually depicted by the intersection of the pointer 125a1 of the pin 125a and the indicia 111a provided adjacent to the slot 111. The first distance may be manipulated by the user by rotating the roller 127b thereby sliding the guide block 120 (linearly and/or axially) and moving the first tip 143a either away or towards the adapter(s) 130a, 130b of the foot 130. The said manipulation in distance is simultaneously reflected by the intersection of the pointer 125a1 of the pin 125a and the indicia 111a.
[59] In an exemplary embodiment, as shown in Fig. 3, the first tip 143a defines a first distance of 5 mm from the slotted adapter 130a of the foot 130. As shown in Fig. 3, the pointer 125a1 of the pin 125a intersects with a “5 mm” mark of the indicia 111a, thus, providing visual confirmation to the user that the distance defined between the first tip 143a and the slotted adapter 130a is 5 mm.
[60] The first tip 143a of the arm 140 may be physically offset (thus, providing an offset arm 240 as shown in Fig. 3a) to introduce offset in the first distance defined between the first tip 143a and the slotted adapter 130a of the foot 130. In other words, a second tip 243a (of the offset arm 240) is physically offset from the first tip 143a.
[61] In an exemplary embodiment, as shown in Fig. 3a, the arm 140 of the device 100 is replaced with the offset arm 240, i.e., the arm 140 and the offset arm 240 are interchangeably coupled to the guide block 120. As shown in the Fig. 3a, the offset arm 240 has a pre-determined offset of negative 5 mm. The pointer 125a1 of the pin 125a intersects with the “5 mm” mark of the indicia 111a but a second distance defined between the second tip 243a of the offset arm 240 and the slotted adapter 130a of the foot 130 is 0 mm, because of the negative 5 mm offset of the offset arm 240. The second distance may be manipulated by the user by rotating the roller 127b thereby sliding the guide block 120 (linearly and/or axially) and moving the second tip 243a either away or towards the adapter(s) 130a, 130b of the foot 130. The said manipulation in distance is simultaneously reflected by the intersection of the pointer 125a1 of the pin 125a and the indicia 111a.
[62] The guide block 120 defines a third distance corresponding to a portion of the guide block 120 that is disposed outside of the lumen 115 of the body 110. For the same third distance defined by the guide block 120, the first distance defined by the arm 140 is different than the second distance defined by the offset arm 240.
[63] The offset arm 240 is structurally similar to the arm 140 except for the introduction of physical offset in the second tip 243a. Fig. 3a1 depicts the offset arm 240 of the device 100. Similar to arm 140, the offset arm 240 includes an elongate member 241 and a curved member 243. The elongate member 241 includes a slot 241a, a hole 241b and a grip portion 241c. The slot 241a is provided with one or more tension arms 241a1. The curved member 243 includes the second tip 243a. The elongate member 241 is slidably and rotatably coupled to the neck portion 123 of the guide block 120.
[64] In another exemplary embodiment, as shown in Fig. 3b, the pointer 125a1 of the pin 125a intersects with a “7 mm” mark of the indicia 111a. But the distance defined between the second tip 243a and the slotted adapter 130a of the foot 130 is 2 mm, because of the negative 5 mm offset of the offset arm 240.
[65] Although the offset arm 240 has been described with an example of negative 5 mm offset, offset arms 240 having offset of at least 1 mm, are also within the scope of the teachings of the present disclosure.
[66] Fig. 4 depicts an exemplary method 300 to use the device 100 of the present disclosure. The method 300 is executed to prepare a bone (i.e., accurately resect the bone) intended to receive an implant. In an exemplary embodiment, the method 300 is executed to prepare the tibial plateau of the tibial bone such that a tibial plate may be implanted on the tibial bone.
[67] The method 300 commences at step 301, where the roller 127b is rotated to set the distance between the first tip 143a and the adapter(s) 130a, 130b of the foot 130. The distance is confirmed by the user by visually inspecting the intersection between the pointer 125a1 of the pin 125a and the markings of the indicia 111a provided on the body 110.
[68] At step 303, the device 100 is coupled to a tibial jig 400 (an exemplary surgical tool used to resect bone). In an exemplary embodiment, as shown in Fig. 4a, the slotted adapter 130a of the device 100 is coupled to the tibial jig 400. In an exemplary embodiment, as shown in Fig. 4a1, the unslotted adapter 130b of the device 100 is coupled to the tibial jig 400.
[69] At step 305, the device 100 is placed adjacent to a tibial bone 10 (or any other bone) such that the first tip 143a of the arm 140 is placed at a pre-determined location on the tibial plateau 11, as determined by the user (physician). The user may interact with the grip portion 141c of the arm 140 to accurately position the first tip 143a of the arm 140 on the tibial plateau 11.
[70] At step 307, the user may use the tibial jig 400 to resect a portion of the tibial plateau 11 of the tibial bone 10 as shown in Figs. 4b and 4b1. In case of the slotted adapter 130a, the resected portion of the tibial plateau 11 has a thickness equivalent to the distance set by the user between the first tip 143a and the slotted adapter 130a. In case of the unslotted adapter 130b, as shown in Fig. 4b2, the resected portion of the tibial plateau 11 has a thickness equivalent to 4 mm more than the distance set by the user between the first tip 143a and the unslotted adapter 130b. Thus, the device 100 provides accurate measurement and resection of the bone to prepare them to receive corresponding implants.
[71] Additionally or optionally, the user may replace the arm 140 with the offset arm 240, if required, and repeat the method 300 mutatis mutandis. Thus, due to the presence of the arm 140, the offset arm 240, the slotted adapter 130a and the unslotted adapter 130b, the device 100 provides accurate customization to the user while the device 100 is being used in a surgical procedure as required. Thus, the device 100 provides the user flexibility to make more precise bone resections during the surgical procedure and ensure optimum implant fit with for example, the tibial plateau 11.
[72] 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. , C , Claims:WE CLAIM
1. A device (100) comprising:
a. a body (110) including a lumen (115);
b. a guide block (120) at least partially disposed within the lumen (115) of the body (110), the guide block (120) configured to axially slide within the lumen (115) of the body (110); and
c. a foot (130) coupled to the body (110), having one or more adapters (130a, 130b);
wherein, the guide block (120) is interchangeably coupled to one of:
i. an arm (140) having an elongate member (141) and a curved member (143), the elongate member (141) slidably and rotatably coupled to the guide block (120), the curved member (143) includes a first tip (143a) defining a first distance from the one or more adapters (130a, 130b) of the foot (130), the first distance is manipulated by axially sliding the guide block (120) within the lumen (115) of the body (110); and
ii. an offset arm (240) having an elongate member (241) and a curved member (243), the elongate member (241) slidably and rotatably coupled to the guide block (120), the curved member (243) includes a second tip (243a) defining a second distance from the one or more adapters (130a, 130b) of the foot (130), the second distance is manipulated by axially sliding the guide block (120) within the lumen (115) of the body (110), the second tip (243a) being physically offset from the first tip (143a).
2. The device (100) as claimed in claim 1, wherein a roller (127b) is disposed within the lumen (115) of the body (110) and around the stem portion (127) of the guide block (120), the roller (127b) having a plurality of internal threads (127b1) complementing a plurality of external threads (127a) of the stem portion (127), the roller (127b) configured to axially slide the guide block (120) within the lumen (115) of the body (110) on rotation of the roller (127b).
3. The device (100) as claimed in claim 1, wherein the elongate member (141, 241) includes a slot (141a, 241a) slidably and rotatably coupled to the neck portion (123) of the guide block (120).
4. The device (100) as claimed in any of the claims 1 and 2, wherein the guide block (120) defines a third distance corresponding to a portion of the guide block (120) that is disposed outside of the lumen (115) of the body (110).
5. The device (100) as claimed in claim 4, wherein, for the same third distance defined by the guide block (120), the first distance defined by the arm (140) is different than the second distance defined by the offset arm (240).
6. The device (100) as claimed in claim 1, wherein the body (110) is provided with at least one slot (111) extending at least partially along a height of the body (110).
7. The device (100) as claimed in claim 1, wherein the body (110) is provided with indicia (111a).
8. The device (100) as claimed in claim 2, wherein the roller (127b) at least partially protrudes out of a window (113) of the body (110).
9. The device (100) as claimed in claim 1, wherein the guide block (120) includes:
a. a neck portion (123) having a first diameter, disposed outside the lumen (115) of the body (110),
b. a stem portion (127) having a plurality of external threads (127a), and
c. a body portion (125) disposed between the neck portion (123) and the stem portion (127), the body portion (125) having a second diameter greater than the first diameter of the neck portion (123).
10. The device (100) as claimed in claim 9, wherein the guide block (120) includes a head portion (121) disposed outside the lumen (115) of the body (110), having a diameter greater than the diameter of the neck portion (123), the neck portion (123) disposed between the head portion (121) and the body portion (125).
11. The device (100) as claimed in claim 9, wherein the body portion (125) is provided with at least one pin (125a) configured to slide within at least one slot (111) of the body (110) corresponding to the axial sliding of the guide block (120).
12. The device (100) as claimed in claim 1, wherein the first distance and the second distance are reflected by intersection of a pointer (125a1) of at least one pin (125a) coupled to the guide block (120) with a marking of indicia (111a) provided on the body (110).
13. The device (100) as claimed in claim 9, wherein the device (100) includes:
a. a washer (127c) disposed adjacent the body portion (125) and around the stem portion (127) of the guide block (120); and
b. a resilient member (127d) disposed within the lumen (115) of the body (110) extending between the washer (127c) and the roller (127b), the resilient member (127d) at least partially encompasses the stem portion (127) of the guide block (120).
14. The device (100) as claimed in claim 1, wherein the one or more adapters (130a, 130b) of the foot (130) include at least one of a slotted adapter (130a) and an unslotted adapter (130b).
15. The device (100) as claimed in claim 9, wherein the elongate member (141, 241) includes a hole (141b, 241b) conjoined with the slot (141a, 241a), the hole (141b, 241b) having a diameter greater than or equal to a diameter of a head portion (121) of the guide block (120).