90 results about "Vascular clamp" patented technology

A vascular clamp and a method for temporarily occluding a vessel. The vascular clamp comprises two jaws, two handles, and a pivoting point. A biasing mechanism is positioned between the handles for biasing the handles apart so that a closing force is imparted along the length of the jaws. The pivoting points pivotally connect the jaws together and are also configured to allow one jaw to be lifted relative to the other jaw. The method of temporarily occluding a blood vessel comprises the steps of providing a vascular clamp as described above and positioning the clamp about a blood vessel.

An improved vascular clamp structure is comprised of a clip body and two clipping pieces, all of which constitute a vascular clamp used cooperatively for medical clamping pliers. The clip body is arranged with a bridge part, and from two ends of which a clipping part extends respectively and making one side of the clip body forming an opening; the clipping piece is arranged with a clipping body with a fitting slot. The fitting slot and the clipping part can be assembled together. Both adjacent faces of the clipping bodies are respectively arranged with a groove and at least one male or female fastener inter-buckled together. Wherein, the clip body is set as a memory metal. By arranging clipping pieces, the vascular clamp of the present invention enhances the frictional areas of inter-contact. Arranging male and female fasteners at the adjacent faces of clipping pieces also enhances the clipping force, and effectively improves the slipping drawback of traditional vascular clamp. In addition, the vascular clamp is made of memory metal; by the separation of male and female fasteners, the vascular clamp further possesses the function of dismantlement.

The present invention relates to vascular clamps, in particular, a clamp designed to clamp a vein or artery such as an umbilical vascular, without severing the vasculature.

The invention discloses a biodegradable medical Zn-Li-X series alloy material and a preparation method and application. The alloy material comprises 0.1-10 wt.% of Li, 0.01-4 wt.% of X and the balance Zn. X refers to at least one element of Cu, Ag, Mn, Mg, Si, Ca and Sr. Thermoplastic deformation processing is further required before smelted alloy is used, the alloy structure is refined, and thus alloy performance is improved. The zinc alloy has the advantages of excellent comprehensive mechanical property, good biocompatibility, regulatory degradation rate and the like and thus can be used as a material for preparing biodegradable medical implantation instruments to be applied to preparation of intravascular stents, bone implants, maxillofacial surgery and craniocerebral surgery implantation instruments, surgical sutures, various sorts of surgical patches, anastomats, vascular clamps or neural restoration catheters and the like.

The invention provides devices, systems and methods for clamping arteries which are useful in reducing or abolishing blood flow in an artery, and may be used to control hemorrhage following a caesarian delivery. A clamping device embodying features of the invention includes a pair of clamping members with opposed pressure-applying members having facing pressure-applying surfaces, at least one of which is a yieldable pressure-applying surface. The yieldable pressure-applying surface is preferably resilient. The clamping members are configured to adjust the distance between pressure-applying surfaces, and a blood flow sensor is disposed on at least one of the pressure-applying members to aid in locating the target artery and also to monitor blood flow through the artery. The clamping device is particularly suitable for occluding uterine arteries by compressing the broad ligament which contains the uterine artery and which is connected to the patient's uterus with the arterial clamp.

The invention relates to a vascular clamp, an occlusion clamp, a vascular clamp mould, and a method for manufacturing the vascular clamp. The vascular clamp has a V shape and is provided with clamp rods, a clamp hook, a clamp seat and clamp rod seats, wherein two clamp rods on two sides are bent and connected; the head part of one clamp rod is provided with the clamp hook and one clamp rod seat; the head part of the other clamp rod is provided with the other clamp rod seat and the clamp seat matched with the clamp hook; and the vascular clamp is made of elastic materials. The occlusion clamp is provided with an occlusion clamp sleeve hook matched with the clamp rod seats. The vascular clamp mould is provided with a vascular clamp mould groove, a mould gate and a flow passage which are communicated. The method for manufacturing the vascular clamp comprises the following steps: making early-stage preparation; performing heating reaction on plants, namely corns through catalysis under normal pressure, extracting a solution, and polymerizing the solution to generate synthesis plastic resin; performing air baking treatment on the synthesis plastic resin; and injecting the synthesis plastic resin into the vascular mould to form the vascular clamp. The vascular clamp has the advantages of reasonable structural design, good clamping and closing effects, convenient and safe surgical use and high reliability.

A magnetic vascular clamp for vascular repair is described. There are two clamp pieces, where each clamp piece forms a partial cylindrical section of an annular cylinder. Each clamp piece has an outer surface and an inner surface, structural ribs arranged across the inner surface from one sectional end to the other, and a pair of magnetic sectional end surfaces connecting the outer surface and the inner surface and having a characteristic magnetic field arrangement. The sectional end surfaces and magnetic field arrangements of each clamp piece cooperate with the sectional end surfaces and magnetic field arrangements of the other clamp piece to form a complete annular cylinder held together by the magnetic field arrangements and enclosing an inner cylinder so as to structurally support damaged vascular tissue therein with minimal fluid leakage.

The invention relates to the technical field of medical instruments, and discloses a disposable vascular clamp. The disposable vascular clamp comprises a first clamping arm and a second clamping arm, the inner end of the first clamping arm is elastically connected with the inner end of the second clamping arm, the outer end of the first clamping arm is provided with a hook, the outer end of the second clamping arm is provided with a clamping base matched with the hook, the inner side surface of the first clamping arm is a cambered surface, the inner side surface of the second clamping arm is a cambered surface, the inner end of the first clamping arm is connected with the inner end of the second clamping arm through an elastic connector, the elastic connector is annular, the elastic connector, the first clamping arm and the second clamping arm are integrated, and several arc-shaped grooves which are distributed along the circular ring are arranged in two side surfaces of the elastic connector. After the disposable vascular clamp can clamp a blood vessel stably, and is not liable to be damaged when the disposable vascular clamp is used, and the disposable vascular clamp can be used more safely.

The invention discloses a metal vascular clamp capable of being degraded and absorbed directionally and a manufacturing method thereof. The metal vascular clamp comprises an upper arm, a lower arm and a tail O-shaped structure, all of which are used for closing the blood vessel. A V-shaped structure is formed by the upper arm, the lower arm and the tail O-shaped structure before closing. The end of the upper arm and the end of the lower arm are provided with self-locking structures matched with each other. When the metal vascular clamp is used, a gap between the upper arm and the lower arm of the V-shaped structure is placed on the blood vessel needing to be closed, and the upper arm and the lower arm are extruded to enable the included angle between the upper arm and the lower arm to gradually become smaller until the self-locking structure of the upper arm and the self-locking structure of the lower arm are locked and closed. The outer side and the inner side of the upper arm and the outer side and the inner side of the lower arm are provided with different microstructures and electric potential differences, the grains on the outer sides are larger than the grains on the inner sides, the electric potential differences on the outer sides are lower than the electric potential differences on the inner sides, and directional degrading from the outer side of the blood to the inner side of the blood is achieved after the vascular clamp is closed. According to the metal vascular clamp, the electric potential differences are changed by changing the tissue structure differences of different positions of the vascular clamp in a directional mode, and orientation degrading in different degrading sequences is achieved.

The invention relates to a drug delivery system for experimental animals, in particular to a tiny vein injection drug delivery system on body surfaces of experimental animals. The system comprises a fixed chamber 5 for experimental animals, a simple desk type magnifying glass, a vascular clamp 7 and an injector 1 with a superfine injection needle 2, wherein the fixed chamber 5 for experimental animals fixes experimental animals; the vascular clamp 7 is clamped above injection blood vessel; the injector 1 is connected with the superfine injection needle 2; the simple desk type magnifying glassis arranged above vein injection operation, and the injection can be carried out; and component parts of the device can be used solely or be in arbitrarily combined use according to actual operation requirement. The invention has the beneficial effect that the tiny vein injection process of experimental animals is more accurate, efficient, convenient and fast.

The invention discloses a biodegradable medical zinc-lithium binary alloy material and a preparation method and application thereof. The biodegradable medical zinc-lithium binary alloy material is composed of, by weight, 0.55%-10% of lithium and the balance zinc. Alloy obtained through smelting further needs to be subjected to thermoplastic deformation processing before being used, so that the alloy structure is refined and the performance of the alloy is improved. The zinc alloy has the advantages of being excellent in comprehensive mechanical property, good in biocompatibility, controllable in degradation rate and the like, can be used as a material for preparing a degradable medical implantable instrument and is applied to prepare endovascular stents, bone implants, maxillofacial surgery and craniocerebral surgery implantable instruments, surgical sutures, various surgical patches, anastomats, vascular clamps or neural restoration catheters and the like.

A fixator of the external circulation tubes and stitch silk for heart operation is composed of a rectangular main body with several fixing slots for external circulation tubes and stitch silk, three folded operation towels and a position where the operation tools are fixed.

The invention discloses a continuous acting vascular clamp. The continuous acting vascular clamp comprises an upper clamp body, a flexible body and a lower clamp body. The continuous acting vascular clamp can be freely opened or closed and can be opened to reach an included angle of 90 degrees, thus the vessel is easily aligned, and the vessel is particularly conveniently clamped and closed during minimally invasive surgery; two ends are fixed and parallel during clamping, so that the clamping force can be parallel and balanced; the clamp can be reversely buckled to be self-locked, and therefore, the vessel can be firmly closed; the clamp can be used in match with an automatic continuous acting plastic clamp, the a plurality of vessels can be continuously clamped to be closed; the clamp is prepared from an absorbable material or non-absorbable polymer synthesis material which can be implanted into a human body for a long term; due to be prepared from a biodegradable material which can be implanted into the human body for a long term, the clamp can be completely absorbed by the human body without residue after permanent vascular embolization, and therefore, the tissue adhesion or obstruction possibly caused by non-absorbable vascular clamp can be effectively avoided.

The invention relates to the field of machines, in particular to a precision mouse spinal cord clamping injury clamp and clamping injury force adjusting method. The distance between the abutting side of the clamp and the clamping penetrating side of the clamp is adjusted by screwing in or screwing out an abutting screw so as to adjust the clamping force. The method comprises the following steps of selecting a female mouse with the weight ranging from 18 g to 21 g, precisely positioning the eleventh vertebral body of the mouse, conducting an osteotomy on the back vertebral plate of the vertebral body, and clamping the segment of the spinal cord to be injured in the left-right direction with a special improved vascular clamp, so that molding is successful. Compared with the prior art, the method for building the spinal cord injury model is simple and easy to implement, precise, easy to repeat, high in success rate and the like. After an injury, behavior indicators, spinal cord injury pathological indicators and glial scar indicators are observed, the method can well simulate the real process formed after the human spinal cord injury, the simulation degree is quite high, the real process is highly reproduced, and the method has the advantages beyond comparison with existing methods.

The invention provides a tissue vascular clamp capable of being decomposed by body fluid. The tissue vascular clamp is made from magnesium-based metal, consists of a primary arm, a self-locking arm, a secondary arm, wherein one end of the primary arm is connected with one end of the secondary arm to form a V-shaped or U-shaped structure; one end of the primary arm is connected with the self-locking arm with an included angle w larger than 80 degrees and smaller than 110 degrees; self-locking devices which are matched with one another are arranged at the other ends of the self-locking arm and the secondary arm. The tissue vascular clamp capable of being decomposed by body fluid provided by the invention is strong in clamping capacity, not prone to drop, can be completely degraded in the body to release trace elements and locally antibacterial, is small in tissue reaction, and does not cause tissue adhesion or obstruction.

The invention discloses a venous indwelling needle for hemodialysis. The venous indwelling needle for hemodialysis comprises a steel needle, a catheter, a catheter holder, a silica-gel flexible pipe, an artery blood leading end connector and a pipe stopper. Grooves with inverted hooks are evenly formed in the outer lateral side of the front end of the steel needle; an elastic clip is installed in the pipe stopper and is used for preventing the needle from being separated from the pipe stopper in the needle withdrawing process; a butterfly wing and a flow control clip are further arranged on the catheter holder and the silica-gel flexible pipe respectively. A safe and effective needling withdrawing mode is arranged, and the danger that patients or medical staff may be stabbed in the needling withdrawing process is avoided; because the clip is added to the silica-gel flexible pipe, inconvenience and potential danger caused by vessel forceps are omitted, and the venous indwelling needle for hemodialysis is more convenient and safer to use; because the butterfly wing capable of rotating freely is arranged , punching is facilitated and fixable area is increased; the needle is more firmly fixed through adhesive tape and doe not easily fall off and the defects that an existing venous indwelling needle for hemodialysis easily falls off are overcome.

The invention discloses a curved hemostatic forceps for conveniently placing an intrathoracic drain. The curved hemostatic forceps conveniently guides the intrathoracic drain into the thoracic cavitysmoothly, avoids excessive force or repeatedly using the hemostatic forceps for exploration, alleviates the sufferings of patients, and improves operation efficiency. The hemostatic forceps consists of grip rings, a buckle, a forceps handle, an axial ring and forceps leaves. Alveolus bed surfaces of two forceps leaves are provided with symmetrical concave surfaces, the concave surfaces are of semiellipse shape along cross sections of the forceps leaves, the concave surfaces of the two forceps leaves form a tubular structure with the cross section of oval shape when the hemostatic forceps is closed, and a tubular head is of conical shape and points at the front end of the forceps leaves; in such a way, a clamped cylindrical intrathoracic drain can slightly deform, which is favorable for exact clamping. Insection at other part of the alveolus bed is transverse insection, and insection at the concave surfaces part is vertical insection along vertical axis of the forceps leaves, which caneffectively clamp the intrathoracic drain tightly, and does not coarsen and damage the smooth surface of the intrathoracic drain. The head of the forceps can support the chest-wall muscular layer andparietal pleura, guide the orifice of the intrathoracid drain clamped by the forceps leaves into the thoracic cavity smoothly, and then the forceps is loosened, and leaves the thoracic cavity. The conical head part of the tubular structure can exactly clamp intrathoracic drains of different diameters, and avoid bringing out the intrathoracic drains when the hemostatic forceps is removed.

The invention relates to a vascular clamp which comprises a supporting rod and a plurality of clips. The supporting rod comprises a supporting rod I and a supporting rod II; the tail end of the supporting rod I and the tail end of the supporting rod II are rotationally connected by a hinge pin; both the supporting rod I and the supporting rod II are movably connected with a plurality of clips; each clip comprises two clip bodies connected by a connecting shaft; each clip body comprises a chuck and a handle; every two corresponding handles are connected by a spring; the bottom of one of every two corresponding handles is provided with a collar; and the clips are sleeved on the supporting rod I and the supporting rod II by the collars. According to the invention, the supporting rod I and the supporting rod II are rotationally connected by the hinge pin, so that blood vessels at different angles can be fixed so as to conveniently carry out suture, and thus, the requirements on end-end suture, end-side suture and side-side suture in clinical practice are met and working intensity of medical personnel is reduced; and the clips are all connected with the supporting rod I and the supporting rod II by the collars, so that in the suturing process, different fixing requirements can be met only by rotating the direction of the clips, so that both time and labor are saved.

The invention discloses a degradable zinc alloy anastomotic apparatus and a preparation method thereof. The degradable zinc alloy anastomotic apparatus uses a degradable Zn-Li-Mn-Y alloy as a material, and the degradable Zn-Li-Mn-Y alloy includes the following components: 0-1 wt.% of Li, 0-1 wt.% of Mn and 0-1 wt.% of Y, without including 0, and the rest are Zn and unavoidable impurities. The degradable zinc alloy anastomotic apparatus includes any one of absorbable suture, medical zipper, anastomotic nail, anastomotic ring, anastomotic clip, anastomotic cannula or vascular clamp. The degradable zinc alloy anastomotic apparatus of the invention is excellent in mechanical properties, simple and convenient in operation, firm in anastomosis, capable of being decomposed in tissues or organs, capable of being fully absorbed by tissues and high in tissue compatibility.

The invention discloses a degradable medical Zn-Li-Fe ternary alloy material, preparation and application. The material is mainly composed of the following materials: 0.4-4wt.% of Li, 0.1-0.8wt.% of Fe, and 95.2-99.5wt.% of Zn. Before use, the alloy obtained by smelting has to be subjected to thermoplastic deformation machining to refine the alloy structure so as to improve the alloy performance. The zinc alloy provided by the invention has the advantages of excellent comprehensive mechanical properties, good biocompatibility and controllable degradation rate, etc., can be applied as a material for preparing degradable medical implantable devices to preparation of endovascular stents, bone implants, maxillofacial surgery and craniocerebral surgery implantable devices, surgical sutures, various surgical patches, anastomats, vascular clamps or neurorestorative conduits, etc.

The invention discloses a vascular clamp. The vascular clamp comprises a first supporting portion, a second supporting portion, a first operating portion, a second operating portion, a first clampingportion, a second clamping portion and a deformation portion, wherein the first supporting portion and the second supporting portion are arranged in a separated mode; the first operating portion extends upwards from the first end of the first supporting portion, and the second operating portion extends upwards from the first end of the second supporting portion; the first clamping portion extendsupwards from the second end of the first supporting portion, and the second clamping portion extends upwards from the second end of the second supporting portion; the distance between the first clamping portion and/or the second supporting portion and a middle vertical plane between the first supporting portion and the second supporting portion is gradually increased upwards from the first supporting portion or the second supporting portion; and the deformation portion is connected with an extending end of the first clamping portion and an extending end of the second clamping portion, and thedeformation portion can be deformed by operating the operating portions. When the vascular clamp is used, the gravity center of the vascular clamp is lower than that of a blood vessel, tissue damage caused by pulling and twisting can be reduced, and the vascular clamp is suitable in size and does not occupy the view during operation.