| CPC A61B 17/320036 (2013.01) [A61B 2017/00367 (2013.01); A61B 2017/00477 (2013.01)] | 28 Claims |
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1. An endoscopic surgical instrument, which comprises:
a front slide, the front slide having a rear main body and an elongated, tubular member, the rear main body having an outer side wall defining a hammer receiving opening and an internal bore in communication with the hammer receiving opening, the main body further having a front wall joined to the outer side wall, the elongated, tubular member being joined to the main body at the front wall thereof and extending axially outwardly from the front wall, the elongated, tubular member having a bore extending axially therethrough, the bore of the elongated, tubular member being in communication with the internal bore of the rear main body;
a scope coupler assembly, the scope coupler assembly including a scope coupler and having means for removably mounting an endoscope or arthroscope on the scope coupler, at least a portion of the scope coupler being received by the internal bore of the front slide such that the scope coupler is mounted on the rear main body of the front slide and is reciprocatingly movable within the internal bore of the rear main body;
a hammer, the hammer being pivotally mounted on the rear main body of the front slide, the hammer having a main body, the hammer main body including an upper portion which extends outwardly of the rear main body of the front slide and through the hammer receiving opening formed therein, and a lower portion disposed opposite the upper portion and extending inwardly of the rear main body of the front slide and into the internal bore thereof, the hammer being pivotable on the rear main body of the front slide between a blade retracted position and a blade extended position, the lower portion of the hammer being engageable with the scope coupler such that the scope coupler is in a first, forward position on the front slide when the hammer is in the blade extended position and is in a second, rearward position on the front slide which is different from the first, forward position when the hammer is in the blade retracted position;
a cannula, the cannula having a generally cylindrical rear section and an elongated, slotted tubular member, the rear section of the cannula having an outer side wall defining an interior bore formed in the rear section, and a front wall having an opening formed through the thickness thereof, the slotted tubular member being joined to and extending outwardly from the front wall of the rear section of the cannula, the tubular member including an outer side wall defining a lumen within the tubular member and having a slot formed through the thickness of the outer side wall in communication with the lumen, the slot extending at least partially along an axial length of the tubular member of the cannula, the lumen being in alignment and communication with the opening formed in the front wall of the rear section of the cannula, the cannula being mounted on the front slide such that the tubular member of the front slide is received by the interior bore of the rear section of the cannula;
a sleeve, the sleeve being mounted on the rear section of the cannula and being at least partially rotatable thereon;
a blade tube, the blade tube having a proximal end portion and a distal end portion disposed axially opposite the proximal end portion, the proximal end portion being at least partially received by the bore of the tubular member of the front slide, and the distal end portion of the blade tube being received by the lumen of the tubular member of the cannula, the blade tube having formed therein a bore extending axially thereon and a blade slot formed thereon, the blade tube being positioned within the lumen of the tubular member of the cannula such that the blade slot is in alignment and communication with the axially-extending slot formed on the tubular member of the cannula; and
a retractable cutting blade assembly, the retractable cutting blade assembly being mounted in the internal axial bore of the blade tube in proximity to the distal end portion thereof, the retractable cutting blade assembly having a cutting blade, the cutting blade being positioned to be in alignment with the blade slot formed on the blade tube so as to selectively project outwardly from the blade tube through the blade slot of the blade tube and through the axially-extending slot formed in the tubular member of the cannula and to selectively retract into the bore of the blade tube;
wherein the front slide and blade tube are configured to receive at least a distal viewing end portion of the endoscope or arthroscope such that the distal viewing end portion of the endoscope or arthroscope is selectively engageable with the retractable cutting blade assembly;
wherein, when the hammer on the front slide is in the blade retracted position, the scope coupler is in the second, rearward position on the front slide to prevent the distal viewing end portion of the endoscope or arthroscope coupled to the scope coupler from exerting a blade extending force on the retractable cutting blade assembly, thereby maintaining the cutting blade in a retracted position within the bore of the blade tube; and
wherein, when the hammer on the front slide is in the blade extended position, the scope coupler is in the first, forward position on the front slide to allow the distal viewing end portion of the endoscope or arthroscope coupled to the scope coupler to exert the blade extending force on the retractable cutting blade assembly, thereby causing the cutting blade to project outwardly of the blade tube through the blade slot formed therein and outwardly of the tubular member of the cannula through the axially-extending slot formed therein.
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