36 results about "Tissue Dissection" patented technology

A surgical stapling instrument is configured to dissect tissue, apply a linear staple line along one side of the tissue dissection and apply a suture, such as a purse string suture, to the other side of the tissue dissection. The instrument comprises an elongate shaft, first and second jaws configured to open and close and a cutting element. The instrument includes a first row of staples in each of the first and second jaws having a suture extending therethrough and a second row of staples in the second jaw. A drive member is configured to translate distally through the end effector to dissect tissue with the cutting element, drive the second row of staples into the tissue on one side of the dissection and to apply the first row of staples and suture in combination to form a purse string suture on the other side of the tissue dissection.

The LNTPI is a surgical instrument used to cut through fibrotic and edematous tissue to define the natural tissue plane of dissection. After defining the natural tissue plane, it is designed to move or carefully insinuate tissues along these natural planes without cutting the tissue, so that targeted organs or parts thereof could be viewed and reached during laparoscopic procedures. The following features make the LNTPI unique compared to standard blunt dissectors used in laparoscopy: 1. The tip of the LNTPI is coarse and not smooth. The tip has diagonal, spiral ridges from the sides which are carried onto the tip converging as a single spiral at the center of the tip, creating a pattern resembling that of a screw; 2. The ridges of the LNTPI are comprised of asymmetrical triangular ridges with an acute angle at the apex that may be leaning along with or against the rotation of the spiral; 3. The tip of the LNTPI is made of tungsten carbide metal instead of stainless steel; 4. Dissection can be done in the usual up, down, left, and right motions as standard dissectors; 5. The side of the LNTPI can be used to "peel" tissue by using the ridges on its side combined with a twisting movement. This maneuver cannot be performed using standard dissectors; and 6. The tip of the LNTPI can perform circumferential dissection when used with a twisting movement causing it to engage tissue like a "drill" along the natural tissue plane. The ridges that converge into a single spiral at the tip of the invention appear like a screw and with the proper twisting movement have a similar effect on tissue. Because of the texture, design, and material used for the tip of the LNTPI, it has the following advantages over standard dissectors: The LNTPI can engage tissues more easily even if the tissues are slippery due to the presence of blood or fluids. The LNTPI can be used to engage tissues through a twisting motion which motion allows the tissues to be engaged in a specific manner that defines natural tissue dissection planes. The LNTPI can insinuate / "peel" tissue by using the side spiral ridges in combination with a twisting movement. The LNTPI can perform circumferential dissection by using the tip and the convergence of the spiral ridges at the center of the tip in combination with a twisting movement. The transfer of lateral shear force to the tissue at various angles (45, 90, and 180 degrees) when using the LNTPI is significantly higher whether the motion is by a sweeping motion or twisting of the instrument, allowing it to insinuate better than standard instruments, especially in a wet field. Hand movements needed in insinuating tissue using the LNTPI are different from the usual hand movements when using standard dissection instruments. The hand movements in using LNTPI require less muscular effort and repetitiveness, thus preventing muscle fatigue and repetitive use injury among surgeons. The instrument is reusable, as compared to dissectors that have fabric at the tip, which must be disposed of and replaced once the fabric tip fully absorbs the blood or other fluid in the wet tissue surface.

This disclosure generally relates to the field of medical devices. In particular, this disclosure relates to a tissue traction device, for example, for endoscopic tissue dissection. For example, the tissue traction device may include a first clamp including opposing jaws. The device may include a traction band having a first end, a second end, and a length extending therebetween and along a longitudinal axis. The band may have a first hole at the first end. A second hole may be present at the second end of the band. The first jaw of the opposing jaws of the first clamp may be disposed through the first hole.

A tissue dissecting device, including an inflatable bladder configured to be inserted into a body via an introducer tube in a compact deflated state, and to be inflated to a substantially planar form in a manner which dissects tissue. A method for dissecting tissue, including inserting an inflatable bladder, in a deflated state, via an introducer tube, into a space in a body, and inflating the bladder to a substantially planar form, thereby dissecting tissue. A method for dissecting tissue, including inserting an introducer tube via an incision into a body, inserting an inflatable bladder, in a deflated state, via the introducer tube, into a space in the body, pulling the introducer tube back at least a length of the deflated bladder, inflating the bladder, via a filling tube, to a substantially planar form, thereby dissecting tissue, disconnecting the filling tube from the bladder, retracting the filling tube and the introducer tube from the body. Related apparatus and methods are also described.

The present disclosure relates generally to the field of medical devices. In particular, the present disclosure relates to a tissue traction device, e.g., for endoscopic tissue dissection. For example, a tissue traction device may include a first clip comprising opposable jaws. The device may include a traction band having a first end, a second end, a length therebetween and extending along a longitudinal axis. The band may have a first aperture at the first end. A second aperture may be at the second end of the band. A first jaw of the opposable jaws of the first clip may be disposed through the first aperture.

A system and associated method for manipulating tissues and anatomical or other structures in medical applications for the purpose of treating diseases or disorders or other purposes. In one aspect, the system includes a delivery device including a flexible portion that is suited to access target anatomy. The flexibility of an elongate portion of the delivery device can be varied. Additionally, the delivery device can include structure that maintains the positioning of the delivery device in patient anatomy.

The present invention relates to the field of medical devices. In particular, the present invention provides a tissue retraction device, e.g., for endoscopic tissue dissection.SOLUTION: The tissue retraction device includes a first clip 112 including a plurality of opposable jaws. The device includes a traction band 114 having a first end, a second end, a length between the first end and the second end, and extending along a longitudinal axis. The band has a first opening at a first end. The second opening is provided at a second end of the band. A first jaw of the opposable jaws of the first clip is disposed through the first opening.SELECTED DRAWING: Figure 1

Devices, systems (100, 200), and methods for separating tissue by moving a material layer (140, 240) with respect to a tissue-separating end effector (110, 210). The material layer is moved over a contact surface (152, 252) of the tissue-separating end effector. Contact of the material and the contact surface with tissue, with the moving material moving with respect to the contacted tissue, causes separation of contacted tissue. The tissue-separating end effector may be considered a blunt tissue dissector.

A modular surgical device is disclosed for efficient tissue dissection and fluid evacuation during surgical procedures. The device comprises a first portion with a cutting end tapered to a sharpened tip, a fluidic channel, and a uniquely shaped aperture. The aperture features an elliptical cross-section oriented at an angle relative to the device's longitudinal axis, potentially enhancing fluid flow dynamics. A releasable locking assembly securely connects the first portion to a second handle portion containing a fluidic channel and an angled external port for evacuation hose attachment. The device's modularity allows for customization and its angled port configuration is designed to minimize interference during surgical procedures.

A histotripsy therapy system configured for tissue treatment, which may include any number of features, is provided. Systems and methods providing effective, non-invasive and minimally invasive therapeutic, diagnostic, and research procedures are provided herein. Systems and methods are provided to facilitate real-time monitoring of delivered dose and tissue dissection. Techniques may include monitoring received acoustic cavitation emission signals or using dMRI.

The cardiac valve tissue dissection device includes a housing having an elongated opening formed therein, a cutting guide arm pivotally connected to the housing by a hinge assembly, the cutting guide arm having a slot formed therein, and an actuator wire coupled to the cutting guide arm. Movement of the actuator wire causes the cutting guide arm to pivot outward from the housing. A cutting element including a blade with a sharp tip is coupled to a track link configured to move along a track within the housing. An actuation slider is coupled to the elongated element and movable through a passage within the housing. Movement of the actuation slider causes the track link and cutting element to move along the track. When the track link is at one end of the track, the blade does not protrude from the housing, and when the track link is not at that end of the track, the blade protrudes from the housing.

In connection with coronary artery bypass grafting (CABG), a blood vessel or vessel section, such as an artery or vein, is "harvested" (i.e., dissected and removed) from its natural location in a patient's body to use it elsewhere in the body. Medical device systems can be used for harvesting blood vessels from a subject's body (e.g., from a leg or an arm) in a minimally invasive fashion. For example, this document describes multifunctional all-in-one blood vessel harvesting systems that can include, for example, a tissue dissector, video camera sensor, vessel positioner, vessel cautery device, vessel cutting device, and user controls that are all integrated into a single device.

The invention relates to a method for generating ultrasonic cavitation and a tissue fragmentation robot system, and the method comprises the steps: carrying out the multi-modal image matching, and obtaining a fusion display image; marking an interested target area and a sensitive medium; extracting acoustic parameters of the multilayer medium, and calculating amplitude compensation values and phase compensation values of a plurality of array element driving signals; according to the tissue type, region division is carried out, and at least one of an inherent threshold value, impact scattering and a boiling cavitation region is included; cavitation focuses are arranged; different sound pressure and pulse parameters are set for the inherent threshold value, the impact scattering area and the boiling cavitation area; and generating ultrasonic cavitation at the position of one cavitation focus, and moving the ultrasonic transduction device to generate ultrasonic cavitation on the other cavitation focus until the ultrasonic cavitation of all the cavitation focuses is completed. Compared with the prior art, the method realizes diversification of ultrasonic emission modes, and has the advantages of high pulse emission precision, remarkable tissue fragmentation effect, small side effect, high cost effectiveness and high registration precision.

The cardiac valve tissue dissection device includes a housing having an elongated opening formed therein, a cutting guide arm pivotally attached to the housing at a distal pivot, the cutting guide arm having a slot formed therein, and a first actuator wire coupled to the cutting guide arm. Movement of the first actuator wire causes the cutting guide arm to rotate about the distal pivot. A cutting element having a blade is coupled to a track link configured to move along a track within the housing. A second actuator wire is connected to the track link. Movement of the second actuator wire causes the track link and cutting element to move distally or proximally along the track. When the track link is in a proximal portion of the track, the blade does not protrude from the housing, and when the track link is not in a proximal portion of the track, the blade protrudes from the housing.

A tissue dissection system for directing a cannula between natural tissue layers includes a tube defining a lumen therethrough; an attachment and stabilization device configured to receive and guide the tube at an operation angle with respect to the natural tissue layers; and an actively steerable cannula (ASC) configured to pass through the lumen of the tube between the natural tissue planes. The ASC defines first and second substantially parallel lumens therethrough configured to receive corresponding first and second steering wires. An attachment and stabilization device for a tissue dissection system is configured to receive and guide a tube at an operation angle with respect to natural tissue layers. The device includes a base having a size and shape so as to securely attach to a body part of interest for tissue dissection.

The application provides a skin surgery tissue stripping and perforating needle, which comprises a structure sleeve, a needle sleeve and a needle body, the lower end of the structure sleeve is provided with the needle sleeve, the inside of the needle sleeve is provided with the needle body, the upper end of the structure sleeve is provided with a screw pipe, the inside of the screw pipe is provided with a screw rod through screwing, the upper end inside of the structure sleeve is provided with an extension cavity, the upper end of the needle body extends into the inside of the extension cavity, and the lower end of the screw rod extends into the extension cavity and is rotationally connected with the upper end of the needle body; the needle body is arranged inside the needle sleeve and the structure sleeve, the screw rod is rotated by rotating the knob, the screw rod is lifted and descended through the screwing of the screw rod and the screw pipe, the needle body is extended and retracted, the length of the needle body extending out is adjusted at any time, the application is convenient to use, and in the adjusting process, the needle body is prevented from rotating in the extension and retraction process through the action of the rotation stopping ring and the movable connection of the bearing, the needle body is more stable in the extension and retraction through the sliding sleeve and the convex point along the sliding groove, and the reliability is ensured.

The present disclosure relates generally to the field of medical devices. In particular, the present disclosure relates to traction systems, and methods of use thereof, for endoscopic procedures such as tissue dissection. For example, a traction system may include a filament extendable along an outer surface of an endoscope with a distal end of the filament attachable to a medical device engaged with a target tissue of a body lumen.

This invention discloses a device and method for creating a mouse model of chronic pancreatitis by impact, belonging to the technical field of animal experimental equipment. The device includes a vibration generator, a vibration rod, and a vibration head, and can also be equipped with an outer shell, levers, and a buffer sleeve. The vibration generator drives the vibration rod to generate high-frequency reciprocating vibrations in the vibration head. The vibration head is a miniature rigid structure with various end shapes such as spherical, spoon-shaped, and forceps-shaped. The outer shell enables tissue dissection, pancreatic clamping, and axial extension and retraction of the vibration head. The buffer sleeve blocks vibration transmission. The modeling method involves pre-setting the device parameters, exposing the pancreas through levers after abdominal incision, allowing the vibration head to contact the target area and initiate high-frequency vibration to complete the modeling. This device achieves precise targeted stimulation of the mouse pancreas, with controllable damage intensity, avoiding collateral damage to surrounding organs. It is simple to operate, has high model repeatability, and can construct mouse models of chronic pancreatitis of different degrees, making it suitable for basic research on pancreatic diseases.

This invention discloses a medical aesthetic lifting guide, which relates to the field of aesthetic medical device technology. It includes an adjusting base and a needle sheath. A fixed base is provided on the upper part of the adjusting base. Limiting shafts are slidably installed on both upper sides of the fixed base. Limiting balls are provided at the upper ends of the two limiting shafts. A first limiting ball is connected to the upper center of the fixed base. A main needle rod is connected to the upper part of the first limiting ball. Guide rods are connected to the upper parts of the two second limiting balls. Guide rods are provided at the other ends of the two guide rods. This medical aesthetic lifting guide adopts a rhomboid design, resulting in a large force-bearing area per operation. The thread forms a triangular tension in the tissue, which greatly expands the lifting range compared to a single needle. The balanced force makes the lifted area smoother. It allows for a larger tissue dissection unit per operation, saving time during the procedure and increasing customer comfort. It changes the limitations of traditional guides and meets the further advancements in medical device usage needs in the aesthetic industry.

This invention discloses a quantitative method for sea cucumber bone fragment density, including steps such as sea cucumber weight measurement, anesthesia, ethanol dehydration, tissue dissection, bone fragment extraction, washing, and density quantification. Anesthesia allows the sea cucumber body wall to fully extend, which helps shorten the low-temperature dehydration time and obtain relatively uniform tissue blocks. Low-temperature dehydration with ethanol causes fibrosis of the sea cucumber body wall, facilitating tissue block dissection and bone fragment extraction. Different body wall tissue blocks are then cut to ensure representative sampling. A weak alkali is used to digest tissue blocks of specific sizes and masses, extracting all morphologically intact bone fragments. Finally, the number of bone fragments is quantified using an optical microscope and a counting frame, and the bone fragment density per unit mass of body wall tissue is calculated using a formula, which is then converted to the bone fragment density under the fresh weight of the sea cucumber before dehydration.

In connection with coronary artery bypass grafting (CABG), a blood vessel or vessel section, such as an artery or vein, is "harvested" (i.e., dissected and removed) from its natural location in a patient's body to use it elsewhere in the body. Medical device systems can be used for harvesting blood vessels from a subject's body (e.g., from a leg or an arm) in a minimally invasive fashion. For example, this document describes multifunctional all-in-one blood vessel harvesting systems that can include, for example, a tissue dissector, video camera sensor, vessel positioner, vessel cautery device, vessel cutting device, and user controls that are all integrated into a single device.

An assembly and / or system has a cutting device configured to cut tissue; and an inflatable device configured to be inserted into the cut tissue to further separate the cut tissue. The inflatable device may be wedge-shaped to separate the cut tissue upon insertion into an incision. The inflatable device is inflatable and otherwise adjustable to separate the tissue to a medically indicated degree. For example, the inflatable device can move axially relative to the cutting device; and / or can be inserted into or removed from the sheathing canal to adjust the exposed inflation length thereof; and / or may include two or more individually inflatable elements. The inflatable device can thus achieve blunt tissue dissection after making an initial incision into the tissue with a sharper instrument.

The invention belongs to the technical field of biomedical optical marking and imaging, and particularly relates to a dyeing imaging method for acquiring three-dimensional tissue anatomical construction information of a biological sample, which comprises the steps of tissue treatment, construction imaging liquid preparation and three-dimensional information acquisition. According to the method disclosed by the invention, the structure type distinction degree is increased by relying on compounding of various construction dyes and utilizing the difference of molecular types, colors and intensities of different fluorescent dyes combined in tissues, so that multicolor and multitype anatomical construction information is obtained. According to the method, real-time ultra-thin chromatography dyeing of the constructed dye on the surface of the resin embedded sample is depended on, the dyeing thickness is reduced by changing the types of the imaging liquid and the resin, and the high-contrast, three-dimensional continuous and uniform and high-resolution imaging effect of the large-volume sample is realized by utilizing consistent surface dyeing time, dyeing thickness and optimal imaging conditions among layers. Compared with the prior art, the method has the advantages that the biological sample does not need to be pre-dyed, and multi-color, multi-type and high-resolution three-dimensional anatomical construction information of the complete organ can be obtained.

The invention discloses a surgical instrument, a surgical system and a surgical instrument.The surgical instrument comprises an instrument body, the instrument body is designed to be in a tweezers form for achieving tissue dissection and comprises first tweezers and second tweezers, and the surgical instrument is integrally provided with a bioelectricity monitoring device and / or an electrocoagulation device; wherein the bioelectricity monitoring device is used for monitoring a bioelectricity signal of a tissue to be subjected to surgical treatment by utilizing the first tweezers and the second tweezers; the electrocoagulation device is used for conducting electrocoagulation treatment on tissue to be subjected to surgical treatment through the first tweezers and the second tweezers. The surgical instrument has the functions of electrocoagulation and / or bio-electricity signal monitoring and tissue dissection, in the using process, the operation of electrocoagulation or electrophysiology monitoring or tissue dissection can be selectively executed according to needs, an operator can flexibly select according to needs, time waste caused by frequent replacement of the surgical instrument in the surgical process can be reduced, and the operation efficiency is improved. And the operation efficiency is greatly improved.

A tissue dissection device and method thereof, the tissue dissection device is connectable to a needle used to define a puncture path. The tissue dissection device includes a blade (170) that cuts the skin while inserting the device into the puncture path to enlarge the puncture path. The tissue dissection device may be configured to laterally separate from an elongated medical device (50) (e.g., a guidewire). The tissue dissection device may include a channel (131) for receiving the elongated medical device. The channel may be configured to (i) retain the elongated medical device within the channel in the absence of intentional manipulation by a clinician and (ii) facilitate lateral removal of the elongated medical device from the channel in response to intentional manipulation. A needle assembly includes a needle coupled to the tissue dissection device. The tissue dissection device may include a sheath (121) extending along a distal portion of the tissue dissection device.

The present disclosure relates to the field of tissue dissection. Specifically, the present disclosure relates to medical devices that lift and retract tissue during a dissection procedure to improve visualization of target tissue and mitigate obstruction of dissection tools. In particular, the present disclosure relates to a tissue retraction device that moves from a constrained configuration to a relaxed configuration during a dissection procedure to secure and retract a peeled portion of target tissue.

The invention provides an antigen repair liquid. The antigen repair liquid is composed of 50-200 ml of a TBS buffer solution, 0.02-0.3 g of trypsin and 0.01-0.5 g of anhydrous calcium chloride. The invention also provides a renal biopsy paraffin section antigen repair method, which comprises the following steps: dewaxing and washing a paraffin section by using a volatile organic solvent to obtain a dewaxed section, putting the dewaxed section into the antigen repair liquid, treating at 35-40 DEG C for 0.5-2 hours, dropwise adding the confining liquid after washing, and keeping the temperature at 35-40 DEG C for 5-20 minutes. The device is good in safety, and experimental accident risks such as container bursting and scalding are reduced; the dissection rate is low, and repeated experiments and specimen loss caused by tissue dissection are reduced; the dyeing effect is stable and remarkable, the reproducibility is good, and the dyeing quality is high.

This invention discloses a plasma tissue dissection knife, relating to the field of medical device technology. To address the problem of reduced surgical efficiency caused by frequent instrument switching during endoscopic surgery involving multiple instruments, the following technical solution is proposed: It includes a blade head, a blade shaft, a handle, and a cable connected in sequence. The blade head includes a blade telescopic assembly located at the tip. The handle houses an endoscope guide tube and a blade telescopic control mechanism, which drives the blade extension and retraction of the blade telescopic assembly via a transmission component. A positive electrode cable extends to the blade head and connects to the blade telescopic assembly, while a negative electrode steel pipe connects to a negative electrode cable, forming a dual-frequency polarized cutting pattern at the blade. A suction channel within the blade shaft is used for surgical field irrigation and intraoperative fluid aspiration. This invention significantly improves upon traditional cold instruments in terms of cutting efficiency, bleeding control, surgical field clarity, optimized blade shaft size, cutting flexibility, sealing performance, and ease of operation.

The present invention relates generally to the field of medical devices. In particular, the present invention relates to traction systems for endoscopic procedures, such as tissue anatomy, and methods of use thereof. For example, a traction system may include a filament extendable along an outer surface of an endoscope, where a distal end of the filament may be attached to a medical device that engages a target tissue of a body lumen.

A laparoscopic instrument includes fluid carrying channels incorporated into lateral aspects of jaws of the instrument and extending to outlets adjacent distal tips of the jaws, fluid carrying channels incorporated into a shaft of the instrument, and flexible fluid carrying channels connecting the distal ends of the shaft channels with the proximal end of respective jaw channels. An actuator on the device handle controls either delivery of fluid jets emanating lateral to tissue grasped between the instrument jaws or suction from the distal tips of the jaws to remove fluid in the vicinity of the jaws. The fluid jets perform atraumatic tissue dissection lateral to the structures grasped by the jaws, while the grasping jaws provide counter traction while conducting soft tissue hydro-dissection, by stabilizing the tissue in a direction opposite to the force exerted by the hydro-dissection fluid jets.