The invention is directed to a surgical instrument having a cylindrical tube for accommodating a guidewire therein.
Surgical instruments, such as scalpels, are used to make an incision in the skin, enabling insertion of devices whose purpose is to deliver various substances to the body. In order to minimize the size of the incision, a guidewire is inserted into the body cavity and instruments can be reliably advanced over the guidewire and into the body cavity for proper placement. This method is known as the “Seldinger Technique.” In many circumstances, the guidewire incision needs to be widened in order to accommodate larger medical devices such as a trocar or catheter. The enlargement is typically done by hand which may lead to an imprecise or larger than needed cut. Therefore, a need clearly exists for a surgical instrument capable of using the guidewire to aid a surgical device, such as a scalpel, in making a more precise incision
With reference to
Body 106 comprises grooves 110 and raised stop 112. Detents formed on cover 108 (not shown) interlock with grooves 110 to allow cover 108 to slide over body 106 from a closed position (
Body 106 further comprises a cylindrical tube 114 attached to a top surface of body 106. Preferably, cylindrical tube 114 is formed integral to body 106 and extends substantially the entire length of body 106. This allows a guidewire to extend behind the operator of surgical instrument 100 so it minimizes interference with a user. The proximal end of cylindrical tube 114 is preferably beveled (
The diameter of cylindrical tube 114 is great enough such that a guidewire may easily be passed therethrough. Only the first several millimeters of the cylindrical tube 114 channel need to be precisely fit the guidewire diameter to ensure that blade 500 is located close to the guidewire. The remaining portion of cylindrical tube 114 may have a wider diameter to minimize friction with the guidewire during advancement of surgical instrument 100.
Cover 108 is sized such that it surrounds body 106 as shown in
Once tangs 408 advance past the end of raised stop 112, tangs 108 return to their initial closed configuration. Now, the surgical device 100 is in an open position as shown in
When surgical device 100 is in an open position, blade 500 is exposed. Blade 500 is depicted in
Referring again to
To use surgical instrument 100, a guidewire 802 is first threaded through cylindrical tube 114 as shown in
Pressing button 1202 causes flexible member 1204 to flex toward cover 108, which in turn raises ledge 1206 over hump 1208. Cover 108 can then be slid to position 1210 (at an end of hump 1208). Here, flexible member 1204 returns to its initial unflexed position, thereby preventing further movement of cover 108.
Device Manufacture
Due to the manufacturing difficulties in molding a long narrow slot like cylindrical tube 114, it is preferable to manufacture body 106 in two halves which can later be joined using sonic welding, adhesive, or any other known methods to secure the two halves. Examples of the two halves that may be joined to form body 106 are depicted in
Another possible method of overcoming these manufacturing difficulties is to manufacture the handle without the channel but with provisions to accommodate a separately manufactured tube to be added. For example, as depicted in
In some embodiments, it may be desirable to permanently connect cylindrical tube 114 to surgical device 100. For example, as shown in
This embodiment of surgical device 100 is similar to that depicted in
The present application claims priority to U.S. Provisional Application Nos. 61/864,070, filed Aug. 9, 2013 and 61/952,386, filed Mar. 13, 2014, the entire contents of which are incorporated by reference in their entirety.
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PCT/US2014/049913 | 8/6/2014 | WO | 00 |
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WO2015/021132 | 2/12/2015 | WO | A |
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Number | Date | Country | |
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20160128713 A1 | May 2016 | US |
Number | Date | Country | |
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61952386 | Mar 2014 | US | |
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