180 results about "Central venous catheter" patented technology

Rapidly insertable central catheters (“RICCs”), introducers, and insertion devices including combinations and methods thereof are disclosed. For example, a RICC system can include an introducer and a RICC insertion assembly including a RICC assembly disposed in a RICC insertion device. The RICC assembly can include a RICC, an access guidewire, and a splittable casing over a catheter tube of the RICC and the access guidewire forming a longitudinal composite. The RICC insertion device can include a frame and a nose cover forming a split channel that splits away from a through channel of a nose of the frame. The RICC insertion device can be configured for advancing the RICC assembly by rolling the longitudinal composite across roller wheels disposed in the frame. The through channel can be configured for advancing the catheter tube therethrough while the split channel can be configured for both splitting and passing the splittable casing therethrough.

The invention belongs to the technical field of medical treatment, and discloses a laryngeal membrane implantation system combined with a central vein puncture device, which comprises a self-retaining laryngoscope, a hollow puncture needle, a catheter sleeved on the puncture needle, a skin expander, a metal guide wire, a central vein catheter, a non-absorbable suture and a laryngeal membrane. The puncture needle penetrates into the laryngeal cavity, and the catheter is retained. And guiding by using a metal guide wire, expanding the skin by using a skin expander, and smoothly placing into the central venous catheter. The central venous catheter is pulled out of the self-retaining laryngoscope, and the non-absorbable suture is reversely arranged along the tip of the catheter, so that the suture smoothly penetrates out of the larynx from the inside of the larynx to the outside of the larynx, the laryngeal membrane is firmly fixed on the larynx, and further adhesion of vocal cords is avoided. Components required by the invention are simple and easy to obtain. Compared with a traditional method, the method is simple and easy to operate, saves operation time and is easy to popularize nationwide.

Rapidly insertable central catheters (“RICC”) and methods thereof are disclosed. In an example, a RICC includes a catheter tube, a suture wing disposed over a medial portion of the catheter tube, a hub coupled to a proximal-end portion of the catheter tube, and a number of extension legs extending from the hub. The catheter tube can include a first section in a distal portion of the catheter tube formed of a first polymeric material having a first durometer. The catheter tube can also include a second section proximal of the first section of the catheter tube formed of a second polymeric material having a second durometer less than the first durometer. The catheter tube can have a column strength sufficient to prevent buckling of the catheter tube when inserted into an insertion site and advanced through a vasculature of a patient without use of the Seldinger technique.

The invention relates to the technical field of central venous catheters, in particular to a construction method of a central venous catheter intelligent decision model based on multi-source data. The method comprises the following steps: acquiring case data of the central venous catheter, processing the data, and obtaining sign data of a patient and structural feature data of the catheter by extracting sign data of a case patient and analyzing structural features of the central venous catheter; acquiring a vein ultrasonic image according to the sign data of the patient, estimating the specification of the central venous catheter through ultrasonic image analysis, and calculating the displacement probability of the catheter; according to the displacement probability data, mistaken touch area collection is carried out, and the abnormal state of the catheter is analyzed in combination with the vein ultrasound image data; performing catheter risk assessment according to the abnormal state data, and constructing a central venous catheter intelligent decision model based on catheter risk data; according to the method, the central venous catheter decision is optimized, so that the central venous catheter decision is more accurate.

The invention relates to the technical field of medical instruments, and discloses a high-pressure-resistant injection type central venous catheter and a preparation method thereof.The high-pressure-resistant injection type central venous catheter is characterized in that a polyurethane elastomer is used as a main body material, and the polyurethane elastomer has high tearing strength and flexibility; the aramid fiber and carbon nanotube composite material is used as a reinforcing layer and is used for improving the pressure resistance and fatigue resistance of the catheter; according to the catheter, polyether block amide is used as an inner layer material, the polyether block amide has excellent elastic restoring force and biocompatibility, and the outer layer material of the catheter is polyether-ether-ketone, so that the temperature resistance and chemical resistance of the catheter are enhanced. By adopting the design of the multi-layer composite material, the high-pressure resistance and the tear resistance of the conduit are remarkably improved, the rigidity problem caused by increase of the wall thickness of a traditional conduit is solved, the sealing performance and the pressure resistance are improved through the design of the conical sealing structure and the metal reinforcing ring of the connector part, and the leakage risk is avoided.

The invention discloses a central vein vascular access complication risk management method and related equipment. The method comprises the steps that based on basic physiological information and edema related information of a patient, ideal pressure values of different edema parts of the patient are determined through a treatment pressure decision model, and the treatment pressure decision model is obtained through training according to historical clinical treatment data; displaying the ideal pressure values of the different edema parts of the patient; in the binding process, the actual pressure value between the bandage and the skin of the patient is obtained, and the actual pressure value is displayed. The problems that in the prior art, complication supervision of a patient after a central venous catheter is implanted through a peripheral vein and infusion port implantation stays in static inquiry, the response speed is low, emergency situations cannot be recognized in time, the data collection mode is single, and the evaluation accuracy is insufficient can be solved.

The invention discloses a synergistic dual-mode anticoagulation and anti-inflammatory central venous catheter BC-BCD double-layer bionic hydrogel coating and a preparation method thereof. BSA / CBAA hydrogel formed by copolymerizing bovine serum albumin and carboxyl betaine acrylamide is used as an outer coating of the catheter, dopamine containing catechol groups is introduced as a main chain network, and BSA / CBAA / DA hydrogel is obtained and used as an inner coating of the catheter. The two layers are combined through a two-step impregnation method to obtain the BC-BCD double-layer bionic coating, thrombus can be defended on a catheter interface in an active mode and a passive mode, oxidation factors in a body can be removed, oxidative stress and bacterial infection can be reduced, and the BC-BCD double-layer bionic coating can be tightly attached to a base material. Experimental results show that the prepared bionic hydrogel coating has excellent anticoagulation and anti-inflammatory performance and long-term stable adhesion performance, the main defects of a traditional central venous catheter are remarkably overcome, and the bionic hydrogel coating has a positive effect on clinical prevention of thrombus and infection.

The invention discloses a hemodialysis central venous catheter with an anti-adherence assembly, and relates to the technical field of hemodialysis, the hemodialysis central venous catheter comprises a double-cavity central venous catheter body, the outer end of the double-cavity central venous catheter body is connected with a connector, the upper end of the connector is connected with a blood outlet pipe and a blood inlet pipe, and the blood outlet pipe and the blood inlet pipe are connected with an anti-adherence assembly. The blood outlet pipe is connected with the blood inlet end of the hemodialysis instrument, and the blood inlet pipe is connected with the blood outlet end of the hemodialysis instrument. The blood outlet and the blood inlet of the central venous catheter are formed in the front end of the central venous catheter, the situation that the side edge of the blood outlet is prone to being attached to the wall to affect the bleeding amount is avoided, meanwhile, the wall attachment preventing assembly is arranged at the end of the central venous catheter, and a gap is formed between the end of the central venous catheter and the blood vessel wall; and the phenomenon that the central venous catheter adheres to the wall is further prevented, so that bleeding and blood inflow of the central venous catheter are guaranteed, and the dialysis effect of a patient is improved.

The invention discloses a central venous catheter with the adjustable inner diameter. The central venous catheter comprises a catheter body, an adjusting assembly and a limiting assembly. The guide pipe body comprises a plurality of arc-shaped plates and a plurality of corrugated plates, the arc-shaped plates and the corrugated plates are sequentially arranged at intervals, and mounting grooves which communicate with one another are formed in the radial directions of the arc-shaped plates and the radial directions of the corrugated plates; the adjusting assemblies are arranged in the mounting grooves, the multiple adjusting assemblies are sequentially connected to form a circular ring structure, the first end of the first folding plate and the first end of the second folding plate are connected with the top and the bottom of the first end of the adjusting part correspondingly, and the second end of the adjusting part is connected with the first end of the arc-shaped block; the second end of the arc-shaped block is connected with the first folding plate and the second folding plate of the other adjusting assembly; the limiting assembly is arranged on the adjusting part. The inner diameter of the catheter body is adjusted, blood vessels of different inner diameters of a patient can be matched, practicability, convenience and protection to the patient are improved, and the thrombus forming probability and nursing difficulty are reduced.

The utility model discloses a dialysis patient central venous catheter anti-slip garment which comprises a garment body, a first front garment piece and a second front garment piece are arranged on the front face of the garment body, and the edge of the first front garment piece and the edge of the second front garment piece are detachably connected through a first connecting assembly; the upper portion of the second front garment piece is provided with an opening and a cloth piece used for covering the opening, the outer surface of the second front garment piece is provided with a first connecting structure on the periphery of the opening, the periphery of the inner surface of the cloth piece is provided with a second connecting structure, and the cloth piece and the second front garment piece are detachably connected through matching of the first connecting structure and the second connecting structure. An inner piece connected with the cloth piece is arranged on the inner side of the cloth piece, the inner piece and the cloth piece form a containing space with a passing opening in the upper end, and the peripheral edge of the inner piece and the peripheral edge of the cloth piece are detachably connected through a second connecting assembly. The service life of the catheter can be prolonged, catheter infection of a patient can be reduced, skin integrity is better protected, the catheter is easy to put on and take off, and the comfort of the patient is improved.

The invention relates to the technical field of venous catheter protection, in particular to a protective device and method capable of protecting a central venous catheter for hemodialysis, the device comprises a controller and a processing box, bandages are symmetrically arranged on the processing box, a telescopic part is arranged in the processing box, and a first protective assembly is arranged on the inner side wall of the processing box; a driving rack is coaxially and fixedly connected to an output shaft of the telescopic piece, and a transmission assembly is arranged on the driving rack. A second protection assembly and a limiting assembly are further arranged on the inner side wall of the treatment box. And an adjusting assembly is arranged on the treatment box. The method comprises the following steps: step 1, skin cleaning; secondly, a guide pipe is installed; and step 3, fixing the conduit. By means of the double protection design of the first protection assembly and the second protection assembly, the central venous catheter can be effectively fixed and protected, the risk that the catheter is displaced, disengaged or damaged due to external pulling or moving is reduced, and therefore the safety of the hemodialysis process is improved.

The utility model relates to the technical field of central venous catheter dressing change, in particular to a central venous catheter dressing change assembly which comprises an installation assembly, a catheter fixing assembly is arranged on one side of the installation assembly, and the catheter fixing assembly comprises an embedded fixing block, a rotating shaft, a connecting shaft, an elastic piece, a first butt joint block and a first permanent magnet. A rotating shaft is connected to the side, close to the mounting assembly, of the inlaid fixing block, a connecting shaft is connected to the middle of the rotating shaft, an elastic part is mounted on the side wall of the inlaid fixing block, a first butt joint block is arranged on the side, away from the mounting assembly, of the inlaid fixing block, and a first permanent magnet is inlaid in the first butt joint block; compared with an existing central venous catheter dressing change assembly, the central venous catheter dressing change assembly has the advantages that the central venous catheter fixing effect is achieved, the head of the central venous catheter can be fixed, the stability of the central venous catheter is guaranteed, meanwhile, connection can be assisted, it can be guaranteed that connection is more stable, and therefore dressing change can be stable.

Disclosed herein are methods of reducing or preventing the complications associated with the percutaneous placement of central venous catheters within a patient, including methods of reducing or preventing central venous stenosis. These methods can involve coating at least a portion of the exterior of the central venous catheter with a coating that reduces friction between the exterior surface of the catheter body and an endothelial wall of the vein. Upon placement the catheter within the vein of the patient, the coating can reduce friction between the catheter body and the walls of the blood vessel, thereby reducing irritation and / or injury of the blood vessel.

The utility model relates to the field of fixed application, concretely is a kind of center vein catheter visual fixed application;Including inner application, inner application inside is provided with adhesive layer, the inner application inside central region is provided with absorbent cotton, several observation holes are set up in the direction from center to edge on the inner application, and the observation area formed by the arrangement of several observation holes in turn is coincident with the reference area on center vein catheter, and the side of several observation areas is provided with scale line, still including outer application, the outer application is attached on observation area, the outer application is transparent material, the outer application is attached on the outer side of inner application and extends the edge of inner application in observation area side, the observation area is arched from below to above and forms fixed groove in the inner side of inner application, and the center vein catheter is arranged in the fixed groove, by setting observation hole on inner application, both the air permeability of puncture point can be guaranteed, and the position of center vein catheter or operation area drainage tube can be observed easily.

The application relates to a guide device for guiding a central venous catheter, belonging to the technical field of medical instruments, and solves the problem that a guide wire of the central venous catheter is easy to be mistakenly inserted into an artery, and the guide wire is difficult to be taken out after being entirely mistakenly inserted into a blood vessel. The guide device for guiding the central venous catheter comprises a guide wire main body, a pressure sensor and a guide wire limiting structure; the guide wire main body serves as a guide structure of the central venous catheter; an outer end of the guide wire main body is provided with the guide wire limiting structure, which is used for assisting in positioning the guide wire main body and preventing the guide wire main body from being entirely inserted into the blood vessel; and the pressure sensor is used for collecting and feeding back a blood vessel internal pressure signal in real time during guide wire advancing, so as to distinguish an artery from a vein according to pressure change. The application realizes limiting of a guide wire puncture depth and judging whether the front end of the guide wire is mistakenly inserted into the artery according to the pressure signal.

The utility model discloses an anti-drop fixing device for a CVC catheter, which relates to the technical field of pneumology department equipment and comprises a CVC central venous catheter, a catheter fixing clamp mechanism is arranged on the outer wall of the CVC central venous catheter, and anti-drop fixing mechanisms are arranged on the left side and the right side of the catheter fixing clamp mechanism. The catheter fixing clamp mechanism comprises a catheter fixing lower plate, an upper plate clamping groove is formed in the top of the catheter fixing lower plate, a catheter fixing upper plate is connected to the inner side of the upper plate clamping groove in a clamped mode, and connecting belts are fixedly installed on the left side and the right side of the front end of the catheter fixing upper plate correspondingly. And the other ends of the two connecting belts are fixedly connected with the front side of the catheter fixing lower plate. According to the catheter fixing clamp, the catheter fixing lower plate, the connecting rod, the U-shaped connecting belt and the cross-shaped positioning mechanism are matched with one another, so that the catheter fixing clamp for preventing the central venous catheter from falling off can be fixed without being sewn on the skin of a patient, and the situation that the wound of the patient is uncomfortable due to the fact that the catheter is pulled carelessly after an operation is avoided.

The utility model relates to the field of medical instruments, in particular to a fixing device for a central venous catheter, which comprises a fixing band and a fixing component, the fixing component is arranged on the surface of the fixing band, the fixing component is used for detachably connecting two sides of the fixing band to form a closed ring, and the fixing device further comprises a reinforcing band, one end of the reinforcing belt is connected with the front face of the fixing belt, the other end of the reinforcing belt is detachably connected with the front face of the fixing belt, and the fixing belt and the reinforcing belt are made of soft materials. The fixing band is fixed to the proper position of the arm of a patient through the fixing assembly, then the central venous catheter can be inserted into the corresponding position of the arm and located in the groove, the central venous catheter is preliminarily fixed through the C-shaped pipeline clamp in advance, and then the central venous catheter is secondarily fixed through connection of the reinforcing band and the fixing band. In the process, fixation is stable, and meanwhile adverse effects on a patient cannot be caused.

A rapid insertion central venous catheter (RICC) insertion assembly and related methods include a valve module. For example, the RICC insertion assembly can include a RICC, an introducer needle, and an access guidewire coupled together by a coupler in which the valve module is disposed. The introducer needle includes a needle shaft with a longitudinal needle slot and a sheath covering the needle shaft, the sheath sealing the needle slot below it except for a portion of the sheath below the sheath opening. The valve module includes an elastomeric gasket surrounding at least a portion of the valve module compartment of the coupler housing. The gasket is compressed within the valve module compartment around both the introducer needle and the access guidewire where the access guidewire extends from the sheath opening, thereby creating a substantially airtight space within the gasket around the introducer needle and the access guidewire.

The utility model provides a central venous catheter assembly, which comprises a puncture needle, a central venous catheter, a central venous catheter and a central venous catheter, the puncture needle is sleeved with the catheter, and the needle tip of the puncture needle is exposed out of the front end of the catheter; the blood stop valve is arranged at the rear end of the catheter, the blood stop valve is connected with a branch pipe, the branch pipe is provided with a Robert clamp, and a three-way connector is arranged at the tail end of the branch pipe; the standard Luer taper is connected to the tail end of the puncture needle, the standard Luer taper is connected with the blood stop valve, and the standard Luer taper is connected with an external injector or a plug; the needle holder is arranged on the catheter and used for clamping the catheter in the catheter pushing process; and the sensor module is arranged on the catheter and is used for monitoring the physical sign data, processing the physical sign data, comparing the processed physical sign data with a standard threshold value, and generating a warning signal when a preset threshold value is reached. According to the utility model, whether the catheter displaces or leaks liquid can be monitored in real time, so that a clinician can find complications caused by catheter displacement as soon as possible.

The utility model belongs to the field of venous catheters, and provides an assembled venous catheter device which comprises a first communicating pipe and a second communicating pipe, the second communicating pipe comprises a cannula fixedly communicated with one end of the second communicating pipe, and the first communicating pipe is provided with a limiting assembly used for limiting the first communicating pipe on the second communicating pipe. A dredging assembly used for extruding the second communicating pipe is arranged on the surface of the second communicating pipe. According to the central venous catheter, the torsional spring can be driven to rotate by pinching the two rotating rods, so that the clamping blocks can be tilted, after the second communicating pipe is installed, the two rotating rods are loosened, the torsional spring is reset, the two clamping blocks are clamped in the two clamping grooves respectively, the effect of fixing the position of the second communicating pipe is achieved, and compared with an existing central venous catheter, the central venous catheter is convenient to use. According to the device, the effect of rapidly installing the first communicating pipe and the second communicating pipe can be achieved, the first communicating pipe and the second communicating pipe which are connected in an inserted mode can be limited through the clamping blocks and the clamping grooves, and the connecting stability of the first communicating pipe and the second communicating pipe is improved.

The utility model belongs to the technical field of venous catheter sealing tools, and particularly relates to a central venous catheter sealing auxiliary device which comprises an insertion tube, the top of the insertion tube is connected with a first connecting tube and a second connecting tube in a penetrating mode, and a second baffle ring is fixed to the outer wall of the upper end of the first connecting tube. And a third baffle ring is fixed to the outer wall of the upper end of the first connecting pipe, the outer side of the upper end of the first connecting pipe is sleeved with a first pipe sealing sleeve, and the first pipe sealing sleeve comprises a sleeve, a supporting hopper, a plugging ball and a connecting strip. The supporting hopper is arranged on the inner wall of the sleeve and located above the end of the first connecting pipe, the plugging ball is arranged above the supporting hopper, the plugging ball is plugged in the hole in the top face of the supporting hopper under the supporting of the connecting strip, plugging of the first connecting pipe below is achieved, and when medical staff need to conduct infusion or liquid extraction, the sleeve can slide downwards, so that the medical staff can conduct infusion or liquid extraction conveniently. And the end of the first connecting pipe penetrates through the top of the supporting hopper and then jacks the plugging ball open, so that communication with an external pipeline is facilitated, and sliding operation is convenient.

The utility model discloses a central venous catheter protection device for a dialysis patient, which belongs to the technical field of medical auxiliary equipment and comprises a central venous catheter body, an upper protection sleeve, a lower protection sleeve, a clamping groove and a clamping buckle. The upper protective sleeve and the lower protective sleeve are symmetrically arranged, one end of the upper protective sleeve and one end of the lower protective sleeve are rotationally connected, the central venous catheter body is located in the upper protective sleeve and the lower protective sleeve, the two clamping grooves are symmetrically formed in one side of the outer portion of the lower protective sleeve, and the two buckles are symmetrically arranged on the other side of the outer portion of the lower protective sleeve. The two buckles are symmetrically arranged on one side of the outer portion of the upper protective sleeve and matched with the corresponding clamping grooves, the central venous catheter body can be protected, and it is prevented that in the treatment process of a patient, the central venous catheter body is folded and flattened, and follow-up treatment work is affected.

The utility model belongs to the technical field of medical instruments, and particularly discloses a central venous catheter end protection device which comprises a base, one end of the base is fixedly communicated with a catheter, and the other end of the base is fixedly communicated with a first hose and a second hose. Compared with a traditional mode that medical gauze is wound, the medical staff can insert the sealing plug into the end opening, so that the end opening of the central venous catheter is protected, meanwhile, compared with a traditional mode that medical gauze is wound, occupied space is small, traveling activities of a patient are not affected, use is convenient, and a hemodialysis fistulization opening in the neck of the patient and the end of a central venous catheter for hemodialysis are wrapped and covered by the device, so that use is more convenient. Compared with the prior art, the sealing plug is simple in structure, attractive in appearance, high in practicability and good in using effect, in addition, a patient or a medical worker only needs to stir the sliding block when disassembling and assembling the sealing plug and the port, and compared with a traditional threaded rotary knob type, the sealing plug and the port are more convenient to install.

This utility model belongs to the field of medical device technology, specifically relating to a double-lumen central venous catheter with anti-wall adhesion and anticoagulation functions, including an extension tube, a double-lumen catheter, and a connector; the extension tube is connected to the double-lumen catheter through the connector; the double-lumen catheter is divided into two inlet lumens by a diaphragm, and the two inlet lumens are connected to two corresponding extension tubes; a side hole and a main hole are provided at the end of the double-lumen catheter, and the end of the double-lumen catheter has a C-shaped segment, with the side hole located on the concave side of the C-shaped segment, and the main hole located at the end of the double-lumen catheter. The C-shaped segment in this design reduces the occurrence of the side hole adhering to the blood vessel wall, reducing the probability of local coagulation and thrombosis when used for pediatric hemodialysis blood drainage; the biomimetic sharkskin microgrooves etched on the outside of the double-lumen catheter reduce resistance to blood flow and thrombus formation; the biomimetic sharkskin microgrooves can be filled with covalently grafted sulfonated heparin-hydrogel, continuously releasing anticoagulant factors, further reducing the formation of wall-attached thrombi.

The invention discloses a central venous catheter flushing device which comprises an injection unit, a liquid storage unit, a connecting channel, a catheter assembly, a flow stopping assembly and a timing driving mechanism. The liquid storage unit is a liquid storage cavity used for storing flushing liquid; the connecting channel is arranged between the injection unit and the liquid storage unit, and a liquid outlet port is formed in the connecting channel; the catheter assembly is used for being connected into a central venous catheter. The flow stopping assembly comprises a flow stopping plug capable of axially sliding, the flow stopping plug is arranged in the connecting channel in a sealed mode and located between the liquid outlet port and the liquid storage unit in an initial state to block communication of the liquid outlet port and the liquid storage unit, and the timing driving mechanism is in linkage with the flow stopping assembly and used for driving the flow stopping plug to move towards the injection unit after a preset time interval. And the liquid storage unit is communicated with the liquid outlet port, so that the central venous catheter is periodically flushed by the flushing liquid. According to the flushing device for the central venous catheter, the catheter can be flushed regularly within the specified time, manual midway intervention is not needed, and therefore the injection effect and the absorption effect of medicine are improved.

The present invention discloses a central venous catheter (CVC) extension device featuring a plate with a bore passing through it and an opening connecting to the bore, with two or more protrusion structures extending from the plate's second side. The opening's first end is linked to the bore, while its second end borders a section of the plate's outer perimeter edge. This device enhances the functionality and versatility of CVC extension devices, providing improved access and ease of use for medical professionals in various clinical settings.

The invention relates to the technical field of medical care quality evaluation, and discloses a system for evaluating the maintenance capability of a nurse central venous access. The system comprises a data acquisition module, a behavior coding module, a step decomposition module and a step quantitative evaluation module which are connected in sequence. The data acquisition module synchronously acquires pressure, flow velocity, blood return images and catheter tip ultrasonic image data during maintenance operation. And the behavior coding module performs time sequence alignment and fusion on the multi-modal data to generate an operation sequence with a behavior tag. The step decomposition module automatically decomposes the continuous operation sequence into independent evaluation steps according to standard regulations. And the step quantitative evaluation module scores each step by using the pre-training network, and verifies the logic rationality of step scores through a consistency algorithm. According to the system, full-process and multi-dimensional automatic objective evaluation of the maintenance capability of the central venous catheter is realized, and the problems of high subjectivity and incomplete coverage of traditional manual evaluation are solved.

The utility model discloses a dressing clamp for fixing a clinical pipeline, and particularly relates to a dressing clamp which comprises a foam coating layer of a duck egg-shaped structure, a plurality of strip grooves arranged in a linear array mode are formed in one side of the foam coating layer, and a bonding layer is arranged on the other side of the foam coating layer. The foam coating layer is divided into a narrow end and a wide end according to the structure, and further comprises a covering part covering the side, where the strip groove is located, of the foam coating layer, and the covering part is located at the wide end and is not connected with the wide end to form an opening; a through hole is formed in the covering part, U-shaped rubber band rings are symmetrically arranged on the foam coating layer, and the U-shaped rubber band rings penetrate through the through hole. The central venous catheter is stored and fixed through the dressing clamp, the condition of the central venous catheter can be conveniently observed in daily nursing, and the inconvenience of clinical use is solved.

According to the technical scheme, the protective device is characterized in that the protective device comprises a flexible fixing disc, a connecting port is formed in the top face of the flexible fixing disc, a protective cover is arranged on the top face of the connecting port, a groove is formed in the bottom face of the flexible fixing disc, and an adhesion patch is arranged in the groove; the clamping and fixing assembly is arranged on the inner circle wall face of the connecting port and used for clamping a catheter, by arranging a stirring gear, when medical staff need to fix the catheter, rotation of the stirring gear and the gear can be directly converted into linear motion of a toothed plate, switching between clamping and loosening is achieved, and when a fixing block makes contact with the catheter and continues to conduct clamping, the clamping and fixing assembly can be used for fixing the catheter. Elastic deformation of the spring can counteract part of clamping force, it is ensured that the fixing block is always in close contact with the outer wall of the catheter through resilience force of the spring, catheter displacement caused by too loose clamping is prevented, and follow-up hemodialysis treatment operation is ensured.

The invention discloses an online audio-video acquisition system and data analysis platform for clinical tests related to central venous catheterization. The online audio-video acquisition system comprises a clinical test announcement module, a test forecast module, an audio-video acquisition module, a data processing module, a key data generation module, a user management module, a user message module and user side software. The video and audio acquisition module and the video and audio storage module are matched for use, so that the test process can be recorded and played online in real time; through cooperative use of the data processing module and the key data generation module, test data can be marked and traced, and all key data needing to be collected are filled into a table; through cooperative use of the user management module, the user message leaving module and the user side software, online consulting, learning and communication of users can be realized, so that the test efficiency is effectively ensured, and questions of peers are prevented from being caused; and meanwhile, the advanced technology can be learned by the peer in real time, and the propagation of the medical technology is accelerated.