132 results about "Single chamber" patented technology

Trocar components and methods of use are described, wherein the trocar components are configured to provide access to intraperitoneal space via the rectouterine pouch to surgical tools, which optionally include one or more surgical robot members. The surgical tools are optionally 5 mm or more in diameter. In some embodiments, a cannula part has a lumen sized to provide to a plurality of the surgical tools simultaneous transvaginal access to the intraperitoneal space via the rectouterine pouch. In some embodiments, an incision sized to receive a distal aperture of the cannula is created, optionally using one or two dilators. The dilators are sized to create (optionally starting from a puncture by a needle 2 mm in diameter or less) an oblong aperture. In some embodiments, the oblong aperture is at least twice as wide across a long diameter as across a short diameter.An access port for sealing an opening of a natural orifice and supplying access to a body cavity through the natural orifice including: a sealing unit; an unobstructed single lumen cannula extending to the body cavity; a connector connecting the cannula to the sealing unit; an access opening through the sealing unit to the single lumen; a cap including a plurality of cap openings configured to seal between medical instruments inserted into the openings and the access opening.

The invention relates to the technical field of medical instruments, and discloses a vascular surgery clinical thrombolysis catheter fixing device which comprises a single-cavity tube, a fixing mechanism arranged at the top of the single-cavity tube and a clamping mechanism arranged on the outer side of the fixing mechanism. The fixing mechanism is used for fixing the skin of a patient and the top end of the single-cavity tube, and the clamping mechanism is used for fixing the tail end of the guide wire; the fixing mechanism comprises a connector arranged at the top of the single-cavity pipe, a sliding groove formed in the middle of the connector, two sliding blocks symmetrically arranged on the two sides of the sliding groove, telescopic units arranged at the bottoms of the sliding blocks and used for transmitting the acting force of the sliding blocks, a connecting plate arranged at the bottom of the sliding groove and two tension springs symmetrically arranged on the two sides of the connecting plate. By arranging the fixing mechanism, the device can be adjusted to adapt to the body surface so as to adapt to the joint, the neck or the groin and other areas, the fixing device can restrain the tail end of the guide wire, and axial sliding or radial deflection of the guide wire caused by external force interference is avoided.

The utility model relates to a catheter type ventricular assist system which can provide different flows and is small in trauma, and comprises a single-channel double-cavity cannula and a single-channel single-cavity cannula, the single-channel double-cavity cannula comprises an inner tube and an outer tube, the near end of the inner tube is communicated with an inlet tube of a blood pump, and an outlet tube of the blood pump is communicated with the near end of the outer tube or the near end of the single-channel single-cavity cannula. Blood is sucked in from the blood inflow port at the far end of the inner tube and flows out from the blood outflow port at the far end of the outer tube to form a small-flow circulation auxiliary system, and blood is sucked in from the blood inflow port at the far end of the inner tube and flows out from the opening at the far end of the single-channel single-cavity cannula to form a large-flow circulation auxiliary system. By means of the mode that the outer tube and the single-channel single-cavity cannula are switched, one set of ventricle auxiliary device can meet small-flow circulation assistance and large-flow circulation assistance, and the ventricle auxiliary device is suitable for different scenes. In small-flow circulation assistance, the outer tube and the inner tube are single-channel double-cavity intubation tubes, the single-channel double-cavity intubation tubes can be intervened to the designated position only through one incision, trauma is small, and postoperative recovery is fast.

The utility model discloses a Y type double cavity type switchable vacuum charging system, including vacuum pump unit, vacuum tank, buffer tank, reaction kettle and vacuum charging control system, vacuum pump unit and vacuum tank are connected through pipeline, reaction kettle feed inlet on the top of reaction kettle is fixedly connected with Y type buffer stock bin through fifth pneumatic butterfly valve, and the vacuum pump unit is connected with the buffer stock bin through the fifth pneumatic butterfly valve. And the upper part of the Y-shaped buffer bin is fixedly connected with a first vacuum charging machine and a second vacuum charging machine through a third pneumatic butterfly valve and a fourth pneumatic butterfly valve respectively. By arranging the two vacuum charging machines smaller than the existing vacuum charging machine in volume, the Y-shaped buffer stock bin and the corresponding pneumatic butterfly valve, double-cavity circulating switching continuous feeding is realized, and the feeding efficiency of the vacuum charging machine is basically the same as that of the existing single-cavity vacuum charging machine, so that the feeding efficiency of the vacuum charging machine is greatly improved in the feeding process. The reaction kettle is always isolated from the two vacuum charging machines, so that harmful gas in the reaction kettle is prevented from eroding the vacuum charging machines and materials in the vacuum charging machines.

The invention discloses a peripheral shock wave balloon system, and belongs to the field of medical technical instruments.The peripheral shock wave balloon system comprises a control unit, a handle seat, a balloon, a dressing change mechanism and a catheter, one end of the catheter penetrates through the dressing change mechanism in a sliding mode and is connected with the handle seat, and the other end of the handle seat is connected with the control unit; the other end of the catheter extends into the balloon and is connected with the balloon; the dressing change mechanism is positioned on one side of the control unit; according to the invention, rapid drug delivery can be realized after the balloon reaches a diseased region, the limitation that a traditional balloon needs to depend on a surface coating or a single chamber to carry drugs is avoided, and the drug delivery amount is ensured; meanwhile, the arranged medicine changing mechanism can be used for rapidly washing and changing medicine for the balloon after the balloon completes single-time medicine feeding, and the delivery sequence and dosage of the medicine can be accurately controlled according to treatment requirements in combined medicine feeding of multiple types of medicine conveniently.

The visual single-cavity bronchial cannula comprises a cannula body, a blocking balloon is arranged on the inner wall of the far end of the cannula body, a trachea cuff and a bronchial cuff which are gradually close to the far end of the cannula body are sequentially arranged on the outer wall of the cannula body, and the trachea cuff, the bronchial cuff and the blocking balloon are all connected with a cuff inflation system. The tracheal tube further comprises a camera shooting system and at least one side vent hole, the side vent hole is formed in the side wall of the tube body and located between the tracheal cuff and the bronchial cuff, and the lens end of the camera shooting system is located below the inner side of the side vent hole and shoots outwards through the side vent hole. The utility model has the advantages that the operation is simple and convenient, the intubation success rate can be improved, and the airway mucosa injury of a patient is reduced.

The utility model discloses a single-cavity silent oxygen generator which comprises a base, and an outer shell and an inner shell are mounted on the base; an air compressor, an air inlet silencer and a nitrogen silencer are installed in the inner shell. An air inlet cavity is formed in the outer shell, a filter is placed in the air inlet cavity, the air inlet cavity is connected with an air inlet silencer, and the air inlet silencer is connected with an air compressor; a condenser pipe connected with an air compressor is arranged outside the inner shell, the other end of the condenser pipe is connected with an adsorption tower, and a nitrogen discharge port of the adsorption tower is connected with a nitrogen silencer; an oxygen outlet is formed in the outer shell, an oxygen exhaust port of the adsorption tower is connected with the oxygen outlet, the air compressor, the air inlet silencer and the nitrogen silencer are installed in the inner shell, an air sound insulation layer is defined by an interlayer space and an air outlet channel and wraps the inner shell, noise transmission can be effectively reduced, the average noise of the whole machine is controlled within 38dB, and the service life of the whole machine is prolonged. An independent gas storage bottle is omitted, oxygen storage and an adsorption tower are combined into a whole, the space is reduced, and the structure is simplified.

The invention relates to the technical field of medical instruments, provides a catheter assembly with flow regulation, backflow prevention and self-adaptive sealing functions, and particularly relates to a peripheral vessel catheter assembly for hemodialysis. The self-adaptive anti-backflow catheter mainly comprises a catheter body, a flow adjusting and anti-backflow linkage unit and a self-adaptive sealing unit. The independent cavities of the main channel and the auxiliary channel can avoid turbulent flow generated by mixing of high-flow blood and medicine in the single-cavity catheter, so that mechanical damage to blood cells is reduced, the flow adjusting and backflow preventing linkage unit accurately adjusts flow through a pressure induction type adjusting piece, a lever mechanism and simple mechanical transmission, and the flow adjusting effect is good. And a bistable silica gel membrane backflow blocking petal and an electromagnetic locking device are matched, so that backflow is reliably prevented. The hemodialysis device has excellent performance in the aspects of flow regulation, backflow prevention, sealing and self-cleaning, and the safety and effectiveness of hemodialysis are remarkably improved.

The invention relates to a balloon catheter for transurethral use, having a proximal region (2) comprising an at least single-lumen catheter shaft (4) with an inflation lumen and an inflatable balloon (5) connected to the distal end of the inflation lumen in a fluid-permeable manner, and a distal region (3) comprising a distal shaft (7) and a distal tip (9). The balloon (5) is coated with a medication and a placement aid (10) is provided at least in the proximal region (2). The placement aid (10) is tubular at least in the region of the balloon (5), and the tubular section has a length at least equal to the length of the balloon (5). The balloon catheter according to the invention allows the conservative treatment of benign prostatic hyperplasia without the use of additional imaging techniques.

The invention is suitable for the technical field of medical treatment, and provides a single-cavity flushing and multi-groove drainage integrated high negative pressure drainage device which comprises a shell, two containing grooves are formed in the shell and used for containing a drainage bottle and a flushing bottle respectively, and a first bottle cap and a second bottle cap are installed on the drainage bottle and the flushing bottle respectively in a sealed mode; an extraction opening and a drainage inlet are formed in the first bottle cap, and a liquid outlet pipe and an air supply opening which extend into the flushing bottle are arranged on the second bottle cap; the drainage tube is connected to the drainage inlet, the drainage tube is provided with a plurality of drainage channels and used for being inserted into the body of a patient for drainage, a flushing tube is arranged in the drainage tube, and one end of the flushing tube extends out of the drainage tube from one side of the drainage tube. According to the high negative pressure drainage device integrating single-cavity flushing and multi-groove drainage, the technical problem that a drainage tube in a traditional drainage device is prone to being blocked is solved, the drainage tube can be flushed, and the drainage effect is remarkably improved.

The utility model discloses a hemodialysis catheter device with multiple connectors. The hemodialysis catheter device comprises a catheter and a conversion connector communicated with the catheter. The adapter can be a single-cavity interface, a double-cavity interface and a multi-cavity interface; the fixed wing is arranged on the adapter and is used for limiting and fixing the catheter; each connector assembly can be connected with a single-cavity connector, a double-cavity connector and a multi-cavity connector. Each connector assembly comprises a first outer extension tube, an ID identification piece and a catheter clamp, wherein the end, away from the conversion connector, of each first outer extension tube is connected with a Luer connector, and the ID identification piece and the catheter clamp are arranged on the first outer extension tube. Through the combination of the catheter and the adapter and the multi-cavity design of the adapter, different numbers of multi-connector dialysis catheter devices can be formed, and the functionality and practicability of the multi-connector dialysis catheter devices are improved.

The invention discloses a pediatric infusion protection device, a using method and a flexible fixing module, the flexible fixing module comprises an antibacterial silica gel buffer layer, an array type pressure sensor and an inflation adjusting unit, and a breathable micro-convex structure is arranged on the inner side of the antibacterial silica gel buffer layer; the array type pressure sensors are embedded into the buffer layer to form 2 * 3 matrix distribution, the inflation adjusting unit comprises a miniature air pump and a multi-cavity air bag, and partition pressure adjustment is achieved through air conveying pipeline connection; the central control module can upload monitoring data such as pressure, temperature and puncture point states to a medical care management terminal through Wi-Fi, centralized management of information of multiple child patients is achieved, and the workload of one-by-one inspection of medical staff is reduced; in addition, the medical staff can remotely send an instruction through the terminal to control the inflation adjusting unit to carry out single-cavity / multi-cavity pressure fine adjustment, the fixing requirement of the child patient after movement can be met without field operation, and the management efficiency is improved.

The invention relates to the technical field of medical instruments, in particular to a nasal gastrointestinal tube with a tube diameter conversion function, which comprises an intestinal tube and a stomach tube, one end of the stomach tube is connected with a reducer tube, the diameter of one end of the reducer tube is the same as that of the intestinal tube, and the stomach tube is connected with the intestinal tube through the reducer tube; an enteric cavity is formed in each of the stomach tube and the reducer tube, a stomach cavity is formed in one side of each enteric cavity, an air inlet cavity is formed in one side of each stomach cavity, a stomach cavity closing wall is arranged between each enteric cavity and the corresponding stomach cavity, and an air inlet cavity closing wall is arranged between each enteric cavity and the corresponding air inlet cavity. According to the multi-cavity nasal gastrointestinal tube, conversion transition from a multi-cavity tube to a single-cavity tube is smoother, and damage of the outside of the tube body to a human body is greatly reduced; the gastrointestinal tube is welded into a whole, no additional adapter substitute is needed, the inner diameter of the intestinal tube body is effectively enlarged, and sufficient drainage, administration and nutrition delivery are achieved.

The present disclosure sets forth a peritoneal dialysis (“PD”) system, which allows the lowest operating ambient temperature of the PD fluid to be decreased without modifying the heater power or the flow rate during treatment. The system includes a PD machine or cycler. Fresh PD fluid is delivered via a single or dual lumen patient line to the patient and is first heated to a body fluid temperature, e.g., 37° C. Before fill, the PD fluid is preheated by pumping the fresh PD fluid from a solution bag, through the inline heater, into an empty solution bag, and back until the fresh PD fluid is heated to a pre-determined temperature. This allows the initial temperature of the fresh PD fluid in the solution bag to be lower.

The utility model belongs to the field of medical instruments, and particularly relates to a portable dry sealing drainage bottle. A common water seal drainage bottle is large in size, complex in internal structure and high in failure rate, a plurality of partition cavities are arranged in the bottle so that a patient can not take exercises conveniently, drainage liquid flows back to the human body when the water seal bottle topples over, and rehabilitation exercise and recovery are not facilitated. The portable dry sealing drainage bottle comprises a drainage bottle body and a drainage connector arranged on the drainage bottle body and communicated with a bottle cavity, the drainage bottle body is provided with a single bottle cavity, an exhaust hole channel communicated with the bottle cavity is transversely formed in the side wall of the upper portion of the drainage bottle body, and a sealing valve capable of blocking flow and exhausting air outwards in a one-way mode is arranged in the exhaust hole channel. And an open liquid storage tank is arranged on the outer surface of the drainage bottle body around the opening at the outer end of the exhaust duct. The bottle cavity is small and exquisite, the interior of the bottle cavity is not separated and is only a single cavity, water seal liquid does not need to be pre-filled, drainage liquid cannot flow back to a human body, drainage is safe and convenient, a patient can conveniently carry the bottle cavity for rehabilitation exercise and daily activities, and the hospitalization time is shortened.

VfA cardiac therapy uses an implantable medical device or system. The implantable medical device includes a tissue piercing electrode that is implanted from the Koch triangle area of the right atrium through the right atrial endocardium and the central fibrous body into the basal region and / or septal region of the left ventricular myocardium of the patient's heart. The device may include a right atrial electrode, a right atrial motion detector, or both. The device may be fully implanted within the patient's heart or one or more leads may be used to implant the electrodes into the patient's heart. The device may be used to provide cardiac therapy, including single chamber or multi-chamber pacing, atrioventricular synchronous pacing, asynchronous pacing, triggered pacing, cardiac resynchronization pacing, or tachycardia-related therapy. Separate medical devices may be used to provide some of the functions for cardiac therapy, such as sensing, pacing, or shock therapy.

The utility model provides a bottom disc device for preventing and fixing enterostomy prolapse, including bottom disc, the outer edge part of symmetrical setting in the bottom disc periphery, the lock hole formed on the outer edge part, transparent ring pad, set in the center of bottom disc, set in the upper convex of transparent ring pad top, a plurality of anti -drop hole is formed on the upper convex, set in transparent ring pad top and in the limiting ring of outer periphery of upper convex, connecting structure is connected with outer edge part, makes bottom disc with transparent ring pad fixed in patient stoma, buckle structure, encircles the top of bottom disc and is used for with limiting ring buckle connection for fixing transparent ring pad. The utility model discloses through the softness of silica gel material, the unobstructedness of anti -drop hole and the protectivity of disinfecting cotton, effectively prevent the prolapse and infection of stoma, can also fix the prolapse of enterostomy, improve the comfort of patient, especially applicable to single cavity stoma and ileostomy.

The utility model relates to an unpowered heat conduction air pipe of an air compressor, which comprises an indoor double-cavity air pipe, an outdoor double-cavity air pipe, a corner double-cavity air pipe, a double-cavity air pipe, a single-cavity air pipe and an air inlet single-cavity air pipe, at least one section of double-cavity air pipe is installed between the indoor double-cavity air pipe and the corner double-cavity air pipe, at least one section of double-cavity air pipe is installed between the outdoor double-cavity air pipe and the corner double-cavity air pipe, and at least one section of single-cavity air pipe is installed between the air inlet single-cavity air pipe and an outdoor air inlet cavity of the outdoor double-cavity air pipe. And height-adjustable supporting legs are mounted at the bottom end of the air inlet single-cavity air pipe. The air compressor has the beneficial effects that on one hand, hot air on the air outlet of the air compressor is led out, and on the other hand, outdoor normal-temperature air is led into a room, so that heat dissipation of the air compressor is promoted, air circulation in the feed plant is promoted, and the environment temperature in the feed plant is reduced.

The utility model discloses a roof drainage structure, which relates to the field of building drainage, and adopts the technical scheme that the roof drainage structure comprises a flow channel, one inner side wall of the flow channel is an arc surface, the other inner side wall of the flow channel is an inclined surface tangent to the arc surface, a plurality of partition plates are arranged in the flow channel at intervals, and the partition plates are detachably connected with the inner side wall of the flow channel. The top surface of the clapboard is lower than the highest water level of the runner. According to the utility model, deposited sundries are intercepted in the cavities by the partition plate, so that the sundries gathered towards the water outlet are reduced, the water outlet is prevented from being blocked by the sundries, the partition plate is taken out when cleaning is needed, the partition plate is prevented from hindering cleaning, and the sectional area of the partition plate is smaller than that of the flow channel; and deposited impurities can pass through the partition plate to be transferred into the adjacent cavity, and the situation that too many impurities exist in a single cavity, and consequently a flow channel is blocked is avoided.

Various embodiments of the present invention comprise a single-chamber collapsible and expandable prosthetic valve implant device with an elevated valve section and comprising the following capabilities: (1) preservation of native valve functionality; (2) initial preservation of native valve functionality with subsequent full replacement of native valve functionality; (3) full replacement of native valve functionality; and / or (4) mitigation of the prolapsing distance of the dysfunctional leaflets by preventing the anterior excursion of the prolapsing leaflets above the upper annular surface and into the left atrial chamber in order to preserve native leaflet functionality for as long as possible. The expanded and implanted device does not extend beyond the boundaries of the subject heart chamber, e.g., the left atrium, thereby enabling the preservation of any remaining native valve functionality with subsequent full replacement of native valve functionality if and when needed.

The device for testing pacemakers in static and extremely low frequency magnetic fields comprises an Agar phantom (6) irradiated by an electromagnetic field source (5) and at least one three-axis static magnetic field sensor (4a) and at least one three-axis alternating magnetic field sensor (4b). These are placed at the same distance from the pacemaker under test (3) to monitor the intensity, direction and spatial distribution of the magnetic field generated by the electromagnetic field source (5) in the area of ​​a single-chamber or dual-chamber tested pacemaker (3) placed in the Agar phantom (6). A test pulse generator (1) is connected to the single-chamber pacemaker (3) by one wire or to the dual-chamber pacemaker (3) by two wires and a response sensor (2) is connected by an electrode to sense the response of the pacemaker (3) in real time. The generator (1), the static magnetic field sensor (4a), the alternating magnetic field sensor (4b) and the response sensor (2) are connected by wires to the communication module (7) and wired or wirelessly connected to a computer (8) for processing, analyzing and visualizing the measured data.

The single-cavity self-balancing support for the bridge comprises a support body made of an elastic material, a sealing cavity is formed in the support body, and the sealing cavity is filled with a pressure-bearing medium; the support provides reliable support in the vertical direction by utilizing the flow characteristic of a pressure-bearing medium and the deformation capacity of an elastic material of the support, and meets the requirement of bridge displacement in the horizontal direction. The multiple support bodies can be communicated in the transverse bridge direction or the longitudinal bridge direction through the communicating pipes to form a supporting system, pressure-bearing media circulate among the supports, automatic balance adjustment is achieved, and all the supports are stressed in a balanced mode. Even if the phenomenon of uneven stress occurs under the long-term action of the load, the balance state can be recovered by adjusting the pressure of the pressure-bearing medium, and the stress uniformity, safety and durability of the bridge structure are improved.

The utility model relates to the technical field of medical equipment, in particular to an isolation balloon with a positioning function. Comprising a handle and an outer needle tube connected with the handle, a diagonal plane facilitating puncture is arranged at the front end, away from the handle, of the outer needle tube, a penetrating type channel is formed in the handle and communicated with the outer needle tube, and an injection channel is formed in one side of the handle and connected with a Luer connector through a hose. The single-cavity catheter is arranged in the outer needle tube, a balloon is arranged at one end of the single-cavity catheter, and the end, close to the balloon, of the single-cavity catheter is closed. When the catheter is used for ablation isolation, due to the fact that the outer needle tube is made of hard materials, compared with a traditional balloon isolation catheter, puncture is more convenient, and for hard tissue organs, puncture and balloon imbedding are easier; when the positioning needle is used for lung positioning, compared with a traditional balloon positioning needle, the liquid injection function is added, coloring agents can be injected, the accuracy of lung positioning is improved, and treatment means are increased.

The invention relates to a nodular cast iron pipe inside and outside spraying bin group and a bin cover opening and closing method, and the nodular cast iron pipe inside and outside spraying bin group comprises a working bin which is a cavity with the top open and the periphery closed; a handling station; the bin cover is located at the top of the working bin, and wheel bodies capable of supporting the bin cover to slide horizontally are arranged at the bottom of the bin cover; the multiple sets of working bins are arranged in series, and a through rail is arranged at the top of each working bin. Connecting assemblies capable of disconnecting or connecting the adjacent bin covers are arranged between the adjacent bin covers on the multiple sets of working bins. One ends of the multiple groups of bin covers are provided with second drivers, and the multiple groups of bin covers or a single bin cover can be dragged to horizontally move by the distance not smaller than the distance for allowing the nodular cast iron pipes to be transported outwards in the working bins, and the beneficial effects are that the slidable bin covers are arranged at the tops of the multiple groups of working bins, and by means of the second drivers, opening of any bin cover is achieved; and the sealing states of other bin covers are not changed.

Described are methods, systems, devices for facilitation of intraluminal medical procedures within the neurovasculature. A catheter advancement device includes a flexible elongate body having a proximal end, a distal end, and a single lumen extending therebetween. The flexible elongate body has a proximal segment, an intermediate segment, and a tip segment. The proximal segment includes a hypotube coated with a polymer. The intermediate segment includes an unreinforced polymer having a durometer of no more than 72D. The tip segment is formed of a polymer different from the intermediate segment and has a durometer of no more than about 35D and a length of at least 5 cm. The tip segment has a tapered portion that tapers distally from a first outer diameter to a second outer diameter over a length of between 1 and 3 cm.

The application discloses a crankcase, which comprises a crankcase body and a cylinder body. The cylinder body is formed on one side of the crankcase body and communicates with the crankcase body. A push rod chamber is formed on the top of the cylinder body. The push rod chamber comprises a reinforcing part, a first push rod chamber and a second push rod chamber which are formed by the reinforcing part. An oil return cavity and an oil return hole are formed in the first push rod chamber and the second push rod chamber, and a double oil return hole structure is formed. The application has the beneficial effect that the push rod chamber is divided into the first push rod chamber and the second push rod chamber by the reinforcing part, the original single chamber is divided into double chambers, the strength and rigidity of the push rod chamber are improved, deformation after long-term use is avoided, the service life of the crankcase is ensured, and the reinforcing part increases the heat dissipation area to transfer part of the heat generated by the piston in the cylinder body, thereby preventing the push rod chamber from deforming.

The needle cylinder assembly comprises a needle cylinder, a needle head and a needle head, a single cavity is formed in the needle cylinder, and freeze-dried powder is pre-filled in the single cavity; and the plunger is accommodated in the needle cylinder in a reciprocating motion manner. Wherein the needle cylinder is made of plastic, and a needle is integrally formed on the needle cylinder, and the needle is also made of plastic. The needle cylinder assembly is simple in structure, easy to operate and convenient to recycle.

A compression wave massage device for body parts is described, particularly for erogenous zones such as the clitoris, comprising a pressure field generation device and a drive device. The pressure field generation device has at least one cavity with a first end and a second end, located opposite the first end and distanced from said first end, with the first end being provided with at least one opening for placement on a body part. The drive device causes a change of the volume of at least one cavity between a minimal volume and a maximal volume such that in at least one opening a stimulating pressure field is generated. The cavity is formed by a single chamber, and the ratio of the volume change to the minimal volume is not below 1 / 10, preferably not below ⅛.

The utility model discloses a single-connector double-side-hole type nutrition pusher which comprises a nutrition tube, a supporting tube and a path finding guide tube, the nutrition tube is movably arranged in the supporting tube in a penetrating mode, and the path finding guide tube is movably arranged in the supporting tube in a penetrating mode. The nutrient canal is in a straight tube shape, a plurality of second interlayer side holes and a plurality of third interlayer side holes are formed in the positions, away from the near end and the far end, of a canal body of the nutrient canal respectively, and the second interlayer side holes are communicated with the third interlayer side holes through a plurality of second interlayer channels formed in the canal wall. According to the nutrient canal, the structural design of the single-cavity connector, the double cavities and the near-end and far-end double-side holes is adopted, the MARK on the nutrient canal is located between the near-end side hole and the far-end side hole, the near-end side hole and the far-end side hole are communicated, when the nutrient canal is placed, it is guaranteed that the MARK crosses the narrow section of the intestinal tract and serves as a temporary intestinal tract support, a patient can eat residue-free fluid by himself / herself, and nutrition can also be injected through the nutrient canal.