DESC: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:
DELIVERY TOOL

2. 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 the manner in which it is to be performed:

FIELD OF INVENTION
[001] This present disclosure relates to a delivery tool. More particularly, the present disclosure relates to a delivery tool for insertion and retrieval of a medical device.
BACKGROUND OF INVENTION
[002] Knee joint is a four-component orthopedic joint involving thigh bone or femur, shin bone or tibia, patella and a cartilaginous tissue between the femur and tibia. The cartilaginous tissue is very important for smooth movement of the knee joint and is crucial for mobility of the whole body. The cartilaginous tissue comprises of a soft part and a fibrous tough part. The soft part or hyaline cartilage covers the thigh bone i.e. femoral component and shin bone i.e. tibial component to reduce friction among these bones during movements. The fibrous part or fibrocartilage provides the cushioning and shock absorbance properties to the knee joint.
[003] Deterioration of these cartilaginous tissue with increasing age results in irreplaceable damage to the knee joint. The patients usually experience difficulty and excruciating pain in the knee while walking, running, and/or sitting, severely impacting the quality of life. Knee arthroplasty commonly known as knee joint replacement surgery being the only remedy for a damaged knee, have become fairly common.
[004] Knee joint replacement prosthesis involves three components, a femoral component, a tibial component and a liner. The surgery involves removing the damaged cartilaginous tissue and surfaces of the femoral and tibial bone. The surgeon makes an incision over the knee joint, rotates the patella to gain access to the joint area. Initially, the femoral bone is resurfaced by removing the damaged bone and cartilage, followed by resurfacing of the tibial bone. During the procedure, the surgeon also takes measurements of the bone. The end of the femur is cut and the femoral component also called a femoral base plate, is positioned. Once the femoral component and tibial component are fixed, the surgeon snaps a medical grade soft insert over the tibial tray which is commonly known as the tibial liner. The tibial liner sits between the femoral component and the tibial component which acts a buffer for absorbing the stress laid on the prosthesis knee joint while bending and flexing the knee. Last step is to readjust and fix the patella bone. After completion, the surgeon may bend the knee to check the flexibility so achieved.
[005] The procedure is quite complicated and given to the human bone complexities, a lot of precision and accuracy is required for a successful surgery. Besides the precision and accuracy in cuts being made on the femoral and tibial bone, placement of tibial liner plays a crucial role in the obtaining a successful knee joint replacement.
[006] For accurate placement of the femoral component, tibial component etc., many tools have been designed for assisting the surgeon in real time acquisition of dimensions, resurfacing, positioning and fitting of both of the bone components. Some of these tools are multipurpose and can position and hold their respective base plates at the same instance, however others may comprise of subparts which function in unison to achieve the goal.
[007] The tools generally contain protrusions, projections, orifices, holes or edges specifically designed to mate with complementing shapes on the prosthesis they are specific to, and are capable of holding them firmly during the procedure. The specification for femoral base plate is totally different from those of tibial tray or the tibial liner so much so that no one tool meant to hold or position one component, can hold or position the other components during the surgery. There are many tools specifically designed for the femoral base plate and the tibial tray. However, no specific tools are known in the art for holding, positioning or extracting the tibial liner.
[008] Therefore, there is a need for devices to handle tibial liners.
BRIEF DESCRIPTION OF DRAWINGS
[009] Fig 1 illustrates an exemplary embodiment, of a delivery tool 100 with a prosthesis of the present disclosure.
[0010] Fig 2 illustrates an exemplary embodiment, of a mounting component 200 of the delivery tool 100 of the present disclosure.
[0011] Fig 2a depicts an exemplary stepped diameter of the shaft 201 of the delivery tool 100 of the present disclosure.
[0012] Fig. 2b illustrates an exemplary embodiment of a handle 205 of the delivery tool 100 of the present disclosure.
[0013] Figs 3-3a illustrate exemplary embodiments of a slider 300 of the delivery tool 100 of present disclosure.
[0014] Fig. 3b illustrates exemplary embodiment of a locking member 309 of the delivery tool 100 of present disclosure.
[0015] Fig 4 illustrates an exemplary embodiment, of a first assembly of the present disclosure.
[0016] Fig 5 illustrates an exemplary embodiment, of the delivery tool without a prosthesis of the present disclosure.
[0017] Fig 5a illustrates an exemplary embodiment, the close-up view of coupling projections of the delivery tool 100 of present disclosure coupled with a trial/prosthesis 600.
[0018] Fig. 5b illustrates an exemplary embodiment of the prosthesis 600 coupled to a pin member 501 of the delivery tool 100 of the present disclosure.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0019] Prior to describing the disclosure 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.
[0020] 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.
[0021] 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.
[0022] 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.
[0023] The present disclosure relates to a delivery tool which firmly holds and suspends a prosthesis (for example, a knee prosthesis) or a trial at an optimized position for insertion in a small cavity between the femoral base plate and the tibial base plate.
[0024] The delivery tool of the present disclosure is provided with a plurality of coupling projections that are capable of suspending a prosthesis/trial at an angle such that the prosthesis/trial can be easily placed as well as retrieved from the cavity between the femoral base plate and tibial base plate. In an embodiment, the delivery tool of the present disclosure is capable of holding the prosthesis/trial firmly suspended at an angular position from the central axis of the assembled device. Conventionally, the surgeon had no option but to place and remove the prosthesis/trial with their hand and fingers which had numerous disadvantages including lack of convenience, susceptibility to infections, incorrect size acquisition of the prosthesis/trial etc. With the use of the delivery tool of the present disclosure, all the disadvantages are overcome as no manual contact is needed which eliminates chances of infection, ease of handling the prosthesis/trial, accurate assessment of size/dimensions, etc.
[0025] The prosthesis/trial on being mounted on the delivery tool of the present disclosure provides an ergonomic advantage to the surgeon while positioning, inserting, holding or replacing the prosthesis/trial. During the procedure, the delivery tool of the present disclosure provides safe solution by streamlining work flow efficiency of the surgeon and the team involved.
[0026] Now referring to the figures, Figure 1 depicts an exemplary delivery tool 100 removably coupled to a prosthesis 600. Alternately, the delivery tool 100 may be removably coupled to a trial. In an embodiment of the present disclosure, the trial/prosthesis is a tibial liner. The delivery tool 100 includes a plurality of components including, but not limited to, a mounting component 200 and a slider 300.
[0027] The mounting component 200 (or component 200) is a rigid or semi rigid structure. The component 200 also defines the central axis of the whole delivery tool 100. The mounting component 200 is capable of coupling with the other components of the present disclosure. The mounting component 200 provides a platform for assembling the other components.
[0028] The slider 300 is a movable component of the delivery tool 100. The slider 300 is mounted on the mounting component 200 as explained below and includes one or more projections that mate with the prosthesis/trial to correctly align or position the prosthesis/trial between the femoral base plate and the tibial base plate. The alignment/positioning includes linear and/or angular alignment with respect to the central axis of the mounting component 200.
[0029] The mounting component 200 includes three parts, namely, a shaft 201, an extension 203 and a handle 205. An exemplary mounting component 200 is depicted in Fig. 2. The proximal end of the mounting component 200 aligns with the proximal end of the handle 205 while the distal end of the mounting component 200 aligns with the extension 203.
[0030] The shaft 201 of the mounting component 200 includes a proximal end 201b and a distal end 201a defining a length therebetween. The shaft 201 can be rigid or semi rigid. The shaft 201 can be of any cross-sectional shape such, as but not limiting to cylindrical, triangular, rectangular, cuboidal etc. In an embodiment, the shaft 201 is cylindrical. The shaft 201 of the mounting component 200 can be hollow or solid. In an embodiment of the present disclosure, the shaft 201 is hollow. The shaft 201 provides a platform for mounting the slider 300 of the delivery tool 100. The materials for making shaft 201 may be selected from, but not limiting to, medical grade stainless steel, polymers etc.
[0031] In an embodiment, the shaft 201 includes a stepped diameter such that the distal portion of the shaft 201 is narrower than the proximal portion of the shaft 201 as shown in Fig. 2a. The distal portion of the shaft 201 defines the span of longitudinal movement of the slider 300. In other words, the distal portion creates a barrier to restrict the movement of the slider 300 along the length of shaft 201 of the mounting component 200.
[0032] The extension 203 of the mounting component 200 extends from the distal end 201a of the shaft 201. The extension 203 acts as a mounting platform for a pin member (shown in Fig. 5 as 501) of the delivery tool 100 of the present disclosure.
[0033] The extension 203 is a rigid or semi rigid structure with a defined body, a distal end and a proximal end defining a length therebetween. The extension 203 can be of a shape such as, but not limiting to cylindrical, cuboidal, conical etc. In an embodiment, the extension 203 is cylindrical. The extension 203 can be of a reduced dimension in comparison to the shaft 201. For example, the diameter of the extension is less than the diameter of the shaft 201. The extension 203 can be solid or hollow. In an embodiment, the extension 203 is solid.
[0034] The extension 203 can be a cast extension of the shaft 201 or alternatively, can be an attachment or an additional mount over the distal end 201a of shaft 201. In an embodiment, the extension 203 is a cast extension of the shaft 201. The extension 203 can be casted at an angle or co-axial to the shaft 201. In an embodiment, the extension 203 is casted co-axially with respect to the shaft 201. Given the extension 203 and the shaft 201 are a single component, the component has better strength. The extension 203 can be made of same material as that of the shaft 201. Alternatively, the extension 203 can be made of a different material from that of the shaft 201 selected from but not limiting to medical grade stainless steel, polymers, etc.
[0035] The handle 205 of the mounting component 200 includes a proximal and a distal end defining a length there between. The handle includes a torso or body extending from the proximal end to the distal end. The handle 205 is used for maneuvering the mounting component 200 and thereby the delivery tool 100 of present disclosure.
[0036] The handle 205 can be of any cross-sectional shape such as but not limiting to triangular, rectangular, circular etc. In an embodiment, the handle 205 has a rectangular cross section. The proximal end of the handle can be of any shape including but not limiting to rounded, rectangular, triangular etc. In an embodiment, the proximal end of the handle is rounded.
[0037] The dimensions of the handle 205 are substantially large than the dimensions of shaft 201 such that the distal end of the handle 205 tapers over the proximal end 201b of shaft 201.
[0038] The handle 205 can be solid or hollow. In an embodiment, the handle 205 is solid. In an embodiment, the handle 205 includes an inner lumen 206. The inner lumen 206 of the handle 205 can have any cross-section including but not limiting to circular, tubular, rectangular, triangular etc. In an embodiment, the inner lumen 206 of the handle 205 has a tubular cross section (fig. 2b). The inner lumen 206 of the handle 205 is capable of receiving the proximal end 201b of the shaft 201. In an embodiment, the proximal end 201b of the shaft 201 is housed within the inner lumen 206 of the handle 205 such that the distal end of the handle 205 covers the periphery of proximal end 201b of the shaft 201.
[0039] The handle 205 is ergonomically designed to provide an optimized grip of the delivery tool 100. In another embodiment, the surface of the torso of the handle 205 includes an ergonomic design to achieve an optimized grip. For example, the torso may include one or more slots 207 to provide optimized grip, reduced weight of the handle etc.
[0040] The handle 205 and the shaft 201 can be an integrated structure or can be coupled using any coupling techniques. In an embodiment, the handle 205 is coupled to the shaft 201 using any suitable coupling techniques such as, but not limited to press-fit, welding, riveting, clamping, bonding, shrink fitting etc. For example, the handle 205 of the mounting component 200 can be a cast extension of the shaft 201 or can be welded to the shaft 201. To a person skilled in the art, it would be obvious that any known means of attaching the handle 205 to the shaft 201 can be used in the context of the teachings of the present disclosure.
[0041] The handle 205 may be made of same material as the shaft 201. Alternatively, the material for making a handle 205 may be selected from, but not limiting to, medical grade stainless steel, polymers, etc.
[0042] For the purpose of illustration, Fig. 3 provides an exemplary embodiment of the slider 300. The slider 300 includes a body 301, a cavity 303, a plurality of coupling projections 307a and 307b, and a locking member 309. The slider 300 is a rigid or semi-rigid structure.
[0043] The body 301 of the slider 300 as in the depicted embodiment, is of a stepped configuration. That is, the body 301 may be a cuboidal body with the two legs 305a and 305b extending from one of the peripheries of the distal surface 301a. The legs 305a, 305b may be standalone structures projecting below the height ‘H’ of the cuboidal body. It is to be noted that various configurations of the body 301 may be devised such that the legs 305a, 305b are positioned below the cavity 303 (described below) and all such embodiments are within the scope of the teachings of the present disclosure.
[0044] The body 301 includes a distal surface 301a and a proximal surface 301b. In an embodiment, one of the peripheries of the distal surface 301a extends into two legs 305a, 305b. The legs 305a, 305b act as a mounting platform for the coupling projections 307a and 307b which removably couple with the prosthesis 600. The coupling projections 307a and 307b are removably coupled to the prosthesis 600 using any coupling technique such as but not limited to slide-fit, press-fit, friction-fit, slot-fit, etc. In an embodiment, the coupling projections 307a and 307b are coupled using a slide-fit coupling mechanism. In an embodiment, the coupling projections 307a and 307b are integrally coupled to the legs 305a, 305b respectively, of the distal surface 301a. Alternately, the coupling projections 307a and 307b may be screwed to the distal surface 301a of the body 301. The two coupling projections 307a and 307b may be separated by a predefined distance. In an example, the distance between the coupling projections 307a and 307b is equivalent to the distance between two holes provided in a side surface of the prosthesis/trial. The coupling projections 307a and 307b protrude forward at an angle with respect to the central vertical axis of the slider 300. The angle may range from 80 to 90 degrees depending upon the dimensions of the prosthesis 600. In the depicted embodiment, the angle is 90 degrees with respect to the central vertical axis of the slider 300.
[0045] The slider 300 includes a cavity 303 for engaging with the mounting component 200. The cavity 303 extends through the width of the slider 300 penetrating the surface at the proximal surface 301b and ending at the distal surface 301a. The cavity 303 can be of a cross-sectional shape selected from but not limiting to circular, tubular, rectangular, triangular, D shaped, etc. In a preferred embodiment, the cavity 303 is D shaped providing a D shaped passage. For the purposes of the present disclosure, the D shaped cross section prevents the rotational movement of the shaft 201 within the lumen of the cavity 303. In an embodiment, the shape of the cavity 303 is complementary to the shape of the shaft 201.
[0046] The materials for making the slider 300 may be selected from but not limiting to medical grade stainless steel, polymers, etc.
[0047] In addition to the distal surface 301a and proximal surface 301b, the body 301 includes a third surface 301c. The third surface 301c may be a lateral surface of the body 301 and includes a hole 311 (shown in Fig. 3a) that extends through the width of the face of the body at the third surface 301c. The hole 311 may be a threaded or semi-threaded hole. The hole 311 receives the locking member 309 which in turn, controls the movement of the slider 300 on the shaft 201. While the depicted embodiment illustrates that the hole 311 is provided at the top end of the third surface 301c, it would be apparent to a person skilled in the art that the hole 311 may be placed anywhere along the third surface 301c. Alternately, the hole 311 may be provided on the top surface of the body 301 or a surface opposite to the third surface 301c. The locking member 309 once inserted in the hole 311, locks or releases the slider 300 on the shaft 201 thereby obstructing or enabling its movement. In an embodiment, the hole 311 and the locking member 309 have complementary threads disposed on their respective surfaces.
[0048] The locking member 309 incudes a head 309a and a tail 309b as depicted in fig. 3b. The tail 309b includes a length that extends between a proximal and a distal end. In an embodiment, the length of the tail 309b is slightly more than the width of the face of the third surface 301c in which the hole 311 is provided. This is needed to ensure effective locking of the slider 300 with the shaft 201.
[0049] The head 309a of the locking member 309 may be defined to be held for maneuvering the locking member 309. The head 309a of the locking member 309 may be of any cross- sectional shape selected from but not limited to, triangular, rectangular, circular etc.
[0050] In an embodiment, the locking member 309 is a screw knob. The materials for making the locking member 309 may be selected but not limiting to medical grade stainless steel, polymers, etc.
[0051] The slider 300 is mounted on the shaft 201 of the mounting component 200 as shown in Fig. 4, referred to as a ‘first assembly’ for the purposes of explaining the teaching of the present disclosure below. The slider 300 through its cavity 303 engages with the shaft 201 of the mounting component 200. The mounting component 200 provides an axis for movement for slider 300.
[0052] Fig 5 depicts a pin member 501 of the delivery tool 100 of present disclosure for coupling with the trial/prosthesis 600. The pin member 501 mounts on the distal end 201a of shaft 201 of mounting component 200. Specifically, the proximal end of the pin member 501 is coupled to the distal end of the extension 203. The extension 203 and the pin member 501 have complementary shapes for proper coupling. The pin member 501 can be coupled co-axially or at an angle to the extension 203. In an embodiment, the pin member 501 is angularly coupled to the extension 203. The angle between the pin member 501 and the extension ranges from 25° to 35° degrees. In an embodiment, the angle between the pin member 501 and the extension 203 is 30°.
[0053] The pin member 501 is a rigid or semi rigid structure with a body, a proximal and distal end defining a length therebetween. The pin member 501 can be of any shape such, as but not limiting to, cylindrical, cuboidal conical etc. In an embodiment, the pin member 501 is cylindrical.
[0054] The pin member 501 may be solid or hollow. In an embodiment of the present disclosure, the pin member 501 is solid. The proximal end of the pin member 501 mates with the extension 203 of the mounting component 200. For example, towards the proximal end of the pin member 501, the inner surface of the pin member 501 may include a hole having a plurality of threads for mating with the extension 203 of the mounting component 200. Alternate ways of coupling the pin member 501 and extension 203 for example, welding etc., are within the teachings of the present disclosure.
[0055] In an embodiment, the pin member 501 is projected at an angle with respect to the central axis of the shaft 201. The angle ranges from 30 to 60 degrees. In an embodiment, the angle of projection of the pin member 501 is adjustable. The distal end of the pin member 501 is operatively coupled to an orifice of the prosthesis/trial (shown in Fig. 5a).
[0056] The materials for pin member 501 may be selected from but not limiting to medical grade stainless steel, polymers, etc.
[0057] To the first assembly, once the pin member 501 is coupled with the extension 203 of the mounting component 200, the second assembly is obtained. The functioning of the delivery tool 100 is described below.
[0058] The mounting process of a prosthesis using the delivery tool 100 of the present disclosure is illustrated by way of following non-limiting exemplary steps. The delivery tool 100 for positioning or repositioning of the prosthesis involves first obtaining the first assembly followed by obtaining the second assembly. The first assembly is obtained by engaging the slider 300 on the mounting component 200 through the cavity 303 of slider 300. The second assembly is obtained by coupling the pin member 501 with the extension 203 thereby assembling the delivery tool 100. The slider 300 is locked in position by rotating the head of the locking member 309. The slider 300 is moved longitudinally to position it at a desired spot over the shaft 201.
[0059] A complementary orifice in the trial/prosthesis 600 is coupled with the distal end of the pin member 501 as depicted in fig. 5b. Thereafter, the coupling projections 307a, 307b are coupled with the respective complementary orifice in the trial/prosthesis. This may require unlocking and moving the slider 300 towards the proximal end 201b of the shaft 201 of mounting component 200 to insert the coupling projections 307a and 307b in the complementary orifices in the trial/prosthesis. The final mounting of the trial/prosthesis is achieved on the delivery tool 100 by locking the position of the slider 300 by clockwise rotation of the locking member 309.
[0060] A non-limiting exemplary process of unmounting the prosthesis and disengagement of the delivery tool 100 involves rotating the locking member 309 anti-clockwise, thereby releasing the slider 300 from its position on the shaft 201 of the mounting component 200. Thereafter, the delivery tool 100 with the slider 300 is pulled slightly for disengaging the coupling projections 307a, 307b from the trial/prosthesis.
[0061] 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 delivery tool (100) for holding and suspending a prosthesis, comprising:
a. a locking member (309);
b. a mounting component (200);
c. a slider (300) mounted on and movable with respect to the mounting component (200), including:
i. a body (301) having a distal surface (301a), a proximal surface (301b) and a third surface (301c);
ii. a plurality of coupling projections for coupling the slider (300) with the prosthesis; and
iii. a hole (311) provided on the third surface of the body (301) to receive the controlling mechanism;
wherein at least distal portion of the mounting component (200) defines the span of longitudinal movement of the slider (300);
wherein the locking member (309) is configured to control the movement of the slider (300) on the shaft (201).
2. The delivery tool (100) as claimed in claim 1, wherein the mounting component includes a shaft (201) having a proximal end (201b) and a distal end (201a) defining a length therebetween and optionally, an extension (203) extending from the distal end (201a) of the shaft (201).
3. The delivery tool (100) as claimed in claim 1, wherein the slider includes a cavity (303) to engage the slider with the mounting component (200).
4. The delivery tool (100) as claimed in claim 3, wherein the cavity (303) extends through the width of the slider (300) penetrating the proximal surface (301b) and the distal surface (301a).
5. The delivery tool (100) as claimed in claim 3, wherein the cavity (303) is D-shaped providing a D-shaped passage to the mounting component and preventing rotational movement of the mounting component.
6. The delivery tool (100) as claimed in claim 1, wherein the locking member (309) includes a screw knob.
7. The delivery tool (100) as claimed in claim 1, wherein the hole (311) and the locking member (309) include complementary threads disposed on their respective surfaces.
8. The delivery tool (100) as claimed in claim 1, wherein the delivery tool (100) includes a pin member (501) coupled to the distal end of the extension (203).
9. The delivery tool (100) as claimed in claim 1, wherein the pin member (501) is adjustably coupled to the shaft (201)where the angle of adjustment ranges from 30 to 60 degrees.
10. The delivery tool (100) as claimed in claim 1, wherein the plurality of coupling projections is angularly coupled to the slider (300) at an angle ranging from 80 to 90 degrees with respect to the central vertical axis of the slider (300).