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Powered surgical apparatus, method of manufacturing powered surgical apapratus, and method of using powered surgical apparatusRelated Patent Categories: Surgery, Instruments, Cutting, Puncturing Or PiercingPowered surgical apparatus, method of manufacturing powered surgical apapratus, and method of using powered surgical apparatus description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20050267501, Powered surgical apparatus, method of manufacturing powered surgical apapratus, and method of using powered surgical apparatus. Brief Patent Description - Full Patent Description - Patent Application Claims
Detailed Description of the Invention BACKGROUND OF THE INVENTION [0001] The invention relates to a powered surgical apparatus, a method of manufacturing the powered surgical apparatus, and a method of using the powered surgical apparatus. In particular, the invention relates to such a powered surgical apparatus usable to shave, cut and/or remove tissue, bone and/or any other bodily material. [0002] Surgical apparatus are powered to enhance shaving, cutting and/or removal of tissue, bone and/or other bodily material. Such powered surgical apparatus can include a shaving or cutting instrument, such as a rotating blade, for example. The rotating blade can be connected to a handpiece which is held by an operator of the apparatus, such as a surgeon, for example. The surgeon, by holding the handpiece in the surgeon's hand, can thereby manipulate the rotating blade to shave or cut desired tissue, bone and/or other bodily material. [0003] One example of such a surgical apparatus is disclosed in U.S. Patent No.5,492,527 (hereinafter "the 527 patent"), the entire disclosure of which is incorporated herein by reference. The 527 patent is specifically directed to a surgical shaver, for use in endoscopic surgical procedures, that drives an elongated rotatable surgical instrument and aspirates material from a surgical work site. As shown in Figs.1-5 and 14 of the 527 patent, the surgical shaver includes a handpiece 10 with a body 12 having a distal end 14, a proximal end 16, a collet assembly 18, a motor seal assembly 20 and a cable assembly 22. A shaver blade assembly 172, which is attached to the body 12 of the handpiece 10 by the collet assembly 18, includes an elongated rotatable inner blade 174 and an elongated outer blade176. The elongated outer blade 176 defines a cutting window 188 facing a direction that is traverse to the axis of the shaver. The collet assembly 18 is manually rotatable to enable rotation of the cutting window 188. [0004] In operation, a surgeon grasps the elongated body 12 of the handpiece 10 in a manner similar to gripping a writing apparatus, such as a pencil or pen. While gripping the body 12 of the handpiece 10 in this manner, the surgeon is able to direct the distal end of the shaver blade assembly to the bodily material to be cut. With the tips of the surgeon's fingers, the surgeon can also rotate the collet assembly 18 to rotate the cutting window 188 to an appropriate position to cut the bodily material. SUMMARY OF THE INVENTION [0005] However, the body of the handpiece of a surgical apparatus, such as the surgical shaver of the 527 patent, is typically more heavy than a common writing apparatus, such as a pencil or a pen. Thus, the hand muscles of an operator, such as a surgeon, used to grasp the body of the handpiece of the surgical apparatus in this manner may tire during a surgical operation, which can take a considerable amount of time. Also, the surgeon may find it difficult to rotate the collet assembly to move the cutting window of the outer blade while supporting the weight of the surgical apparatus by grasping the body of the handpiece as if it was a writing instrument. Further, the surgeon may find the operation of gripping the body of the handpiece of the surgical apparatus as if it was a writing apparatus to be otherwise cumbersome, unnatural or troublesome. [0006] The invention addresses the above and/or other concerns and can provide a powered surgical apparatus, method of manufacturing the powered surgical apparatus, and method of using the powered surgical apparatus that facilitates ease of operation and/or promotes utility of operation. The invention can also provide apparatus and methods that facilitate and promote ease and effectiveness of cleaning and/or sterilization of at least a portion of the apparatus. [0007] The invention can be used to cut, shave and/or remove tissue, bone and/or any other bodily material in a variety of surgical procedures, such as general ear, nose and throat (hereinafter "ENT"), head and neck, and oteneurologic procedures, for example. In accordance with one embodiment of the invention, it is used as a sinus debrider. However, the invention can be used in other surgical procedures. More specifically, the invention can be used in sinus procedures, such as ethmoidectomy/ sphenoethmoidectomy, polypectomy, septoplasty, antrostomy, endoscopic DCR, frontal sinus drill-out, frontal sinus trephination and irrigation, septal spurs removal, and trans-spehnoidal procedures, for example. The invention can be used in nasopharyngeal/laryngeal procedures, such as adenoidectomy, laryngeal lesion de-bulking, laryngeal polypectomy, tracheal procedures, and tonsillectomy, for example. The invention can be used in head & neck procedures, such as soft tissue shaving, rhinoplasty (narrowing the bony valut and revision of the bony pyramid), removal of fatty (adipose) tissue (lipodebridement) in the maxillary and mandibular regions of the face, and acoustic neuroma removal, for example. The invention can also be used in otology procedures, such as mastoidectomy, and mastoidotomy, for example. [0008] The above list of surgical operations and procedures is not intended to be exhaustive, and the surgical apparatus in accordance with the invention is intended to be used in any other applicable currently known or later developed surgical operation and procedure. In fact, the apparatus in accordance with the invention is not only intended to be used in surgical operations and procedures for humans, but can also be used in applicable surgical operations and procedures for animals and other organic matter. [0009] However, even though the apparatus is intended to be usable in a variety of other applications, for convenience of explanation it is described below in the context of human surgery, such as ear, nose and throat surgery, and in particular sinus surgery. In this context, the apparatus and methods in accordance with the invention can be provided to comply with, but do not necessarily need to be provided to comply with, standards for surgical instruments, such as the following current voluntary standards: UL 2601-1: Medical Electrical Equipment, Part 1: General Requirements for Safety Australian Deviations, CSA22.2 No. 601: Canadian Standards, IEC 601-1-1 (EN 60601-1): Medical Electrical Equipment, Part 1: General Requirements for Safety, IEC 601-1-2 (EN 60601-1-2) Medical Safety Equipment, Part 2: Particular Requirements for Safety, IEC 601-1-4 (EN 60601-1-2) Medical Electrical Equipment, Part 1: General Requirements for Safety 4. Collateral Standard: Programmable Electrical Medical Systems, IEC 61000-4-2: Electromagnetic Compatibility (EMC) -- Part 4: Testing and Measurement Techniques -- Section 2: Electrostatic Discharge Immunity Test, IEC 61000-4-3: Electromagnetic Compatibility (EMC) -- Part 4: Testing and Measurement Techniques -- Section 3: Radiated, Radio Frequency, Electromagnetic Field Immunity Test, IEC 61000-4-4: Electromagnetic Compatibility (EMC) -- Part 4: Testing and Measurement Techniques -- Section 4: Electrical Fast Transient/Burst Immunity, IEC 61000-4-5: Electromagnetic Compatibility (EMC) -- Part4: Testing and Measurement Techniques -- Section 5: Surge, IEC 529: Installation Protective Equipment, ISO 10993-1: Biological Evaluation of Medical Devices, and EN55011 Limits and Methods of Measurement of Electromagnetic Disturbance Characteristics of Industrial, Scientific, and Medical (ISM) Radio-Frequency Equipment, Class B, for example. The apparatus and methods in accordance with the invention can also be provided to comply with other current standards and/or any later developed standards. [0010] Various aspects of the invention are described below. These aspects are provided for exemplary purposes only, and should not be construed as limiting the scope of the invention.I. Handle [0011] The invention includes a handle that is usable as a powered surgical apparatus with a movable cutting blade assembly. The handle includes an upper portion defining a distal section connectable to the cutting blade assembly. The handle also includes a lower portion that extends downwardly from the upper portion so as to define an angle of less than 90( with the distal section of the upper portion. [0012] This structure provides ergonomic advantages over other handle structures. For example, the operator of the above handle may grasp the handle as if was a pistol, and find the pistol grip easier to hold for long periods of time, easier to operate with one hand or easier to precisely manipulate the cutting blade assembly to its desired area, for example. The orientation of the lower portion relative to the upper portion also reduces, minimizes or prevents interference between the lower portion and the patient's chin during certain surgical procedures, such as sinus surgery. This orientation also enables at least one of a surgeon's fingers to be disposed at a position to facilitate manipulation of a collet assembly, which can be provided to form a distal section of the upper portion and enables rotation of a cutting window of the cutting blade assembly. [0013] The invention also provides a method of manufacturing the above handle. The method includes forming an upper portion having a distal section that is connectable to the movable cutting blade assembly, and connecting a lower portion to the upper portion such that the lower portion extends downwardly from the upper portion so as to define an angle of less than 90( with the distal section of the upper portion. [0014] The invention also provides a handle that is usable as a powered surgical apparatus with a movable cutting blade assembly and a source of irrigation fluid. The handle includes an upper portion defining a distal section connectable to the cutting blade assembly. The upper portion includes a proximal end that defines an irrigation fluid coupling that is connectable to the source of irrigation fluid. The upper portion defines an irrigation fluid channel that extends from the irrigation fluid coupling to the cutting blade assembly. The handle also includes a lower portion that extends downwardly from the upper portion. [0015] This handle provides various advantages. For example, this handle provides ergonomic advantages while also enabling the use of irrigation fluid. [0016] The invention also provides a method of manufacturing this handle. The method includes forming an upper portion having a distal section that is connectable to the movable cutting blade assembly, forming an irrigation fluid coupling that is connectable to the source of irrigation fluid at a proximal end of the upper portion, forming an irrigation fluid channel from the irrigation fluid coupling to the cutting blade assembly, and connecting a lower portion to the upper portion so as to extend downwardly from the upper portion.II. Handle Assembly [0017] The invention also provides a handle assembly that is usable as a powered surgical apparatus with a movable cutting blade assembly and a source of irrigation fluid. The handle assembly includes a handle having a distal section that is connectable to the movable cutting blade assembly. The handle includes a proximal end that defines an irrigation fluid coupling. The handle defines an irrigation fluid channel that extends from the irrigation fluid coupling to the cutting blade assembly. The handle assembly also includes a connector that is connectable to the proximal end of the handle at the irrigation fluid coupling. The connector defines an irrigation fluid entry channel that is contiguous with the irrigation fluid channel of the handle. [0018] This invention provides various advantages. For example, utilizing the connector obviates connecting the source of irrigation fluid directly to the cutting blade assembly. Thus, the source of irrigation fluid does not need to be detached from the handle assembly when the cutting blade assembly is changed. [0019] The invention also provides a method of manufacturing this handle assembly. The method includes forming a handle having a distal section that is connectable to the movable cutting blade assembly, forming an irrigation fluid coupling at a proximal end of the handle, forming an irrigation fluid channel in the handle from the irrigation fluid coupling to the cutting blade assembly, connecting a connector to the proximal end of the handle at the irrigation fluid coupling, and forming an irrigation fluid entry channel in the connector that is contiguous with the irrigation fluid channel of the handle. [0020] The invention also provides a handle assembly that is usable as a powered surgical apparatus with a movable cutting blade assembly. The handle assembly includes an upper portion defining a distal section that is connectable to the cutting blade assembly and a lower portion that extends downwardly from the upper portion. The handle assembly also includes a trigger switch assembly that is connected to the lower portion that provides at least one output signal relevant to operation of the powered surgical apparatus. [0021] This handle assembly provides various advantages. For example, because of its disposition on the lower portion of the handle, the trigger switch assembly can be easier to operate than other types of actuating mechanisms, such as a footswitch, for example. Continue reading about Powered surgical apparatus, method of manufacturing powered surgical apapratus, and method of using powered surgical apparatus... 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