72 results about "Bone trephine" patented technology

A bone recuperating drilling device includes a trephine in the form of a tube designed to be driven in rotation, open at both ends and provided with teeth on the periphery of its front opening. The trephine is internally equipped with a bone crushing blade which has one end provided with cutting edges extending substantially in the plane of the trephine front opening.

A system is disclosed for creating a hole in a body vessel or hollow organ. Such holes are useful in surgically preparing the hollow organ or body vessel for connection with another hollow organ, body vessel or prosthetic conduit. For example, an assist device is generally connected to the left ventricle through a ventriculotomy created at the apex of the left ventricle. This ventriculotomy is most easily created with a punch or trephine. Control over such a procedure must be precise so as not to damage the ventricular wall or intracardiac structures such as papillary muscles, chordae tendinae, etc. The punch of the current invention allows for precise location and alignment of the cutting segment. The punch of the current invention also allows for precise advance of the cutting blade and a very clean cut of the tissue. Such clean cuts improve the healing when the hole in the body vessel or hollow organ is closed or attached to a connection, either prosthetic or natural.

A generally cylindrical broken bone screw removal device having a trephine assembly located at the distal end and a proximal end adapted to be engaged by a tool for rotating the device. The trephine assembly has a trephine, an alignment pin, and an internal annular cam. The cam is free to rotate independent of the trephine. The internal wall of the cam has a D shaped cross-section which is tapered, i.e. decreases in size from the distal toward the proximal end of the device. The internal diameter of the trephine is eccentric to its outer diameter, and the D shaped cross-section of the cam is eccentric to the internal diameter of the trephine. A broken screw is removed from bone by placing the trephine over the proximal end of the screw and rotating the device while applying pressure to cause the trephine to core bone around the screw, so that the device descends down the body of the screw until the screw to enters the interior of the cam to a depth where it engages the tapered walls of the cam and causes the cam to rotate with respect to the adjacent internal wall of the trephine; and the body of the screw becomes wedged between the cam internal wall of the trephine to transmit torque from the device to the screw to unscrew it from the bone.

The present invention relates to a stapler apparatus, comprising a stapler having a proximal end, a distal end and a longitudinal axis, the stapler further comprising a trigger, an anvil docking pin aligned substantially parallel with the longitudinal axis of the stapler, and a stapling means, the anvil docking pin and stapling means being at the distal end of the stapler, and a detachable anvil, comprising an anvil head and an anvil shaft, wherein the anvil shaft is adapted to receive the anvil docking pin and operation of the trigger causes the stapling means to be actuated, characterised in that the length of the anvil shaft is at least 4 cm. The present invention also relates to a method of forming an anastomosis between two surfaces using the stapler apparatus of the invention and a method of forming a stoma trephine in a subject using the stapler apparatus of the invention. The present invention further relates to the use of the stapler apparatus or anvil for a stapler apparatus in such methods and a kit of parts comprising the stapler apparatus of the invention and additional components.

A method of surgically accessing intervertebral disc space involves a less invasive technique than prior procedures. The method avoids violation of the disc annulus and utilizes the annulus for containment of artificial disc material. The less invasive technique results in less blood loss and minimization of surgical trauma. The method includes the steps of identifying a target disc space, preparing portals adjacent the disc space, introducing a guide wire into each of the portals, using the guide wires, removing a core of bone with a trephine along each of the portals, and accessing the intervertebral disc space for performing intradiscal procedures.

A surgical instrument for forming precise incisions in a cornea of an eye is provided. The surgical instrument comprises a blade carrier and an applanator. The blade carrier has a central bore and a blade. The blade depends from a distal end of the blade carrier. The applanator has an applanating surface. The applanator is received within the central bore of the blade carrier. The applanator is positioned within the central bore to axially position the blade a desired blade depth relative to the applanating surface such that when the applanating surface applanates the cornea the blade penetrates the cornea to a desired depth.

The invention discloses a decellularized heterogeneous corneal stromal carrier and its preparation method and application. The carrier is an animal lamellar cornea from which epithelial cells and stromal cells have been removed through hypertonic solution combined with enzyme digestion. The preparation method of the carrier is as follows: firstly, take Fresh animal eyeballs are aseptically operated under an operating microscope, and the lamellar cornea with a thickness of 150 μm to 400 μm is drilled with a graduated trephine drill with a diameter of 5 mm to 12 mm, and then removed under the combined action of hypertonic solution and trypsin/pancreatin substitute The cells are finally dehydrated and dried to obtain the decellularized heterogeneous corneal stroma carrier, which is stored for future use. The decellularized heterogeneous corneal stroma carrier can be used as a corneal transplant donor to directly perform therapeutic corneal transplantation, and can also be used as an artificial biological corneal scaffold to construct a full-layer or lamellar artificial biological cornea. The decellularized heterogeneous corneal stroma carrier prepared by the invention has the following characteristics: the collagen is neatly arranged, similar to normal corneal tissue, and has good transparency after rehydration.

The invention relates to an instrument for preparing an corneal endothelial graft, the tool being a trephine blade (1) having a cross section in the form of an arc of a circle of between 270° and 355°. The invention also relates to a method of preparing a graft using such an instrument.

A cruciate ligament rebuilding hollow trephine belongs to medical apparatuses and instruments. A bone residue removing rod is arranged in an axial center hole of the trephine in an insertion mode, and the bone residue removing rod and the trephine are positioned as a whole through the fastening matching of a fastening screw mounted on the bone residue removing rod with an axial sliding hole on the side wall of the trephine. A piston is mounted at the front end of the bone residue removing rod in the axial center hole of the trephine. Sawteeth of the trephine are arranged on the front side end surface of the trephine. Kirschner wires are inserted into the bone residue removing rod, the piston and the axial center hole of the trephine sequentially, and the outer surfaces of the Kirschner wires match with the inner surfaces of the bone residue removing rod, the piston and the axial center hole in a contact mode, so that the Kirschner wires can be positioned radially. The cruciate ligament rebuilding hollow trephine is simple in structure, high-quality and effective in bone-side tunnel establishment and simple in postoperation bone residues removing.

The invention relates to an articular process directional bone cutting trephine which structurally comprises a directional casing, a guide rod and a trephine, wherein an axially-penetrating trephine through-connection hole passage and an axially-penetrating guide rod through-connection hole passage are formed in a body of the directional casing; the lower end of the directional casing is an angled end face; a lower port of the trephine through-connection hole passage is cut into an inclined port; the guide rod is a straight-handle round rod, and axially-penetrating thread eyes are formed in the guide rod; the trephine is a cylindrical straight rod with a handle, the lower end of the cylindrical straight rod is a hollow end, and annular sawteeth are arranged on lower end edges of the cylindrical straight rod; and the length of the cylindrical straight rod is greater than that of the guide rod. By adopting the articular process directional bone cutting trephine provided by the invention, an operative approach direction can be accurately positioned, sclerotins obstructing in the operative approach direction can be accurately abraded on the premise of a safe and stable condition, and in the process of abrading the sclerotins, the abrading range can be expanded by rotating the directional casing, so that an accurate and broad implantation space is provided for a working casing, and a sufficient visual angle is provided for an endoscope.

The invention relates to a trephine having a limiting sleeve, wherein the trephine is used for a medical surgery purpose in skull defect and skull puncture surgeries. The trephine with the limiting sleeve comprises a motor, an internal trephine, and at least one trephine sleeve. The internal trephine is nested in the trephine sleeve by means of at least two bearings and is driven, by means of themotor, to rotate. The external trephine sleeve defines and adjusts the cutting depth of the internal trephine, while protecting a surgery operator and the tissue around a surgical site from being injured by a trephine rotating at a high speed; moreover, by drilling using the trephine having a limiting sleeve, a bone flap can be completely removed and retrieved from a trephined bone. The present invention realizes standardization and repetition of cranial defect and drilling surgery, and makes the surgery simple, easy to operate, safe and reliable, efficient, and is less traumatic. In a commonmedical researching laboratory condition, the trephine supplies a surgery technological insurance for a skull defect model and a clinical medical craniotomy and skull puncture of mice to large animals.

The invention relates to a multifunctional trephine. The multifunctional trephine is characterized by comprising a host and a drill bit; the host comprises a battery clamping groove, a battery, a handle, a motor, a lighting lamp, a switch fuse, a heat dissipating hole, a motor, a drill bit connecting clamping groove base, a clutch and a sensor; the drill bit connecting clamping groove base is arranged at the head end of the host, the drill bit is detachably connected with the drill bit connecting clamping groove base, the battery clamping groove is formed in the bottom end of the host, the battery is arranged in the battery clamping groove, the lighting lamp is installed at the front end of the handle, the switch fuse is arranged at the position, easy to operate, of the handle, the motor is arranged in the host, the heat dissipating hole corresponds to the motor in position, the clutch is arranged in the drill bit connecting clamping groove base, the drill bit is connected with the clutch device, and the sensor is arranged on the drill bit and connected with the motor in a linkage mode. When the drill bit drills through the bone, the sensor detects the changes of rotating speed and torque of the drill bit to be in linkage with the motor so that the motor can stop working and force the drill bit to stop rotating.

The invention provides a corneal trephine. The corneal trephine comprises a body part in a hollow cylindrical shape, a knife part in an approximate hollow cylindrical shape, and a finger holding part, wherein the thickness of a column wall of the knife part is gradually reduced from top to bottom; a knife edge for annular cutting is formed at the bottommost end of the column wall; an upper end of the knife edge is fixedly connected with a lower end of the body part; a central shaft line of the knife edge is overlapped with that of the body part; finger holding part comprises a hollow cylindrical body and lug bodies symmetrically fixed to an outer side surface of the hollow cylindrical body, the hollow cylindrical body of the finger holding part can be rotationally sleeved onto the body part; and an alignment device is also arranged on the finger holding part. When being used for corneal transplantation, the corneal trephine can be easily and accurately fixed to a cornea of a patient so as to avoid shifting or separation of the corneal trephine in the corneal transplantation, a proper and uniform pressure can be easily applied to the corneal trephine, and a knife feeding situation can be conveniently observed, thereby enabling the corneal transplantation to be safer and accurate.

The present invention relates to an extracting device for extracting bone core (20). The extracting device comprises a tubular tool (1) and a grasping tail (3) for rotating and driving the tool (1) through one apparatus. The devices for guiding the tool (1) comprise a rod (4) exposed from the tool (1). The rod (4) is installed with centralizing devices (2, 11; 9, 10) on the extracting device. The devices for guiding the tool (1) include a drill (19, 25). The drill (15) can install a front opening (6) in the bone material before the tool (1) contacts the bone material (7). The front opening (6) forms a channel for receiving the exposed end of rod (4). The exposed end of rod (4) forms a guiding finger-shaped object (5) which is installed with a pin mode. The pin can be guided to one front opening (6) according to the invention.

The present invention relates to a stapler apparatus, comprising a stapler having a proximal end, a distal end and a longitudinal axis, the stapler further comprising a trigger, an anvil docking pin aligned substantially parallel with the longitudinal axis of the stapler, and a stapling means, the anvil docking pin and stapling means being at the distal end of the stapler, and a detachable anvil, comprising an anvil head and an anvil shaft, wherein the anvil shaft is adapted to receive the anvil docking pin and operation of the trigger causes the stapling means to be actuated, characterised in that the length of the anvil shaft is at least 4 cm. The present invention also relates to a method of forming an anastomosis between two surfaces using the stapler apparatus of the invention and a method of forming a stoma trephine in a subject using the stapler apparatus of the invention.; The present invention further relates to the use of the stapler apparatus or anvil for a stapler apparatus in such methods and a kit of parts comprising the stapler apparatus of the invention and additional components.

There is disclosed a trephine guide having an upper guide member having a first substantially circular guide aperture and a first circumferential portion and a lower guide member having a second substantially circular guide aperture and a second circumferential portion. The upper and lower guide members are connected in a spaced apart configuration by at least one arm extending from the first circumferential portion to the second circumferential portion, such that the first and second guide apertures are substantially concentric, thereby to allow a trephine to pass through the upper and lower guide members. The at least one arm has a width that extends over less than three quarters of the circumference of the first or second circumferential portions to allow good visibility to a trephine blade.

The invention discloses a skin biopsy trephine device which comprises a cylindrical trephine body with the two ends open. An annular cutter is arranged at the front end of the trephine body. A piston is arranged in the trephine body and connected with a push-pull rod. The free end of the push-pull rod extends out of a rear end opening of the trephine body and provided with a pushing handle. A cutting edge of the annular cutter is of a shuttle shape. Scale marks are arranged on the outer surface of the annular cutter in the length direction of the annular cutter. According to the skin biopsy trephine device, the cutting edge of the annular cutter is of the shuttle-shaped structure, compared with a circular cutting edge of an existing annular cutter, the shuttle-shaped cutting edge has the advantages that a wound surface is small, alignment suture is easy, healing is fast, and the phenomena of a dog ear and scars are not prone to generation; the scale marks are arranged on the outer surface of the annular cutter, the incision depth can be displayed and the material obtaining depth can be effectively controlled conveniently; in addition, the skin biopsy trephine device is made of metal except for the piston so that the device can be reused after being sterilized and disinfected and use cost can be reduced.

The invention discloses a device for taking out a broken instrument in a root canal and a take-out method thereof. The device is characterized by comprising a mechanical trephine and a single-opened window sleeve, wherein the mechanical trephine is composed of a cylindrical trephine (1) and an adapter, wherein the adapter is composed of a connector (2) and a fastener (3); the cylindrical trephine (1) is connected with one end of the connector through a fastener; the other end of the connector is matched with a connector in a dentsply root canal treatment motor, so that the cylindrical trephine is arranged on the dentsply root canal treatment motor to realize rotary control on the cylindrical trephine; the single-opened window sleeve is composed of a single-opened window sleeve body (4), a wedge (5) and a clamping handle (6); and a manual trephine can be replaced with the mechanical trephine to form another set of device. According to the take-out method of the device for taking out the broken instrument in the root canal, a few of dental tissues are removed when the broken instrument in the root canal is taken out, and the device has the advantages of being simple and fast to operate.