Auxiliary device in PICC (peripherally inserted central catheter) puncture catheterization

Abstract

The auxiliary device in the PICC puncture catheterization operation comprises two clamping plates, and a plurality of clamping arms are movably arranged on the two side walls of the two clamping plates. The clamping plates are provided with driving structures used for driving the multiple clamping arms to synchronously operate so as to clamp the arms of an external patient and fixing structures used for fixedly connecting the clamping plates and a bed body of an external operating bed, and one of the clamping plates is provided with a guiding structure used for guiding an external catheter to be slowly placed in. The other clamping plate is provided with an auxiliary structure used for fixing an external sheathing canal. The problems that in the prior art, PICC puncture catheterization auxiliary equipment is difficult to adapt to arms of different patients, the function of guiding or assisting unskilled medical staff in the PICC catheterization operation is lacked, and in the traditional PICC puncture catheterization operation process, the catheterization precision and the catheterization efficiency are affected due to the fact that the medical staff need to operate with one hand in some steps are solved.

Description

Technical Field

[0001] The invention relates to the technical field of PICC puncture and catheterization auxiliary equipment, and in particular to a PICC puncture and catheterization auxiliary device. Background Art

[0002] PICC puncture and catheterization is a common medical operation, widely used in clinical practice, to provide patients with long-term intravenous infusion, chemotherapy and other treatments. This technology inserts a catheter through a peripheral vein and sends it to the central vein to reduce the stimulation of drugs on blood vessels and improve the treatment effect. However, there are some problems with the PICC puncture and catheterization auxiliary devices currently on the market: First, the patient population varies greatly in age, body shape, and other aspects. The circumference, length, and muscle development of the arm vary. Traditional PICC puncture and catheterization auxiliary equipment often uses a fixed-size clamp or a simple strap structure to fix the patient's arm. This single-specification design is difficult to accurately fit the arm contours of different patients, resulting in unstable fixation. In addition, when patients with no mobility undergo catheterization surgery, they need to assist in fixing their arms. In actual operations, a slight shake of the arm will interfere with the puncture action of medical staff, resulting in deviations in the positioning of the puncture point, increasing the patient's pain and the risk of complications. Second, the PICC catheterization operation process is relatively complicated, and requires high professional skills and practical experience from medical staff. Medical staff who are new to this technology are inevitably nervous and unfamiliar when operating. Most of the existing auxiliary equipment only has simple limb fixation functions, and lacks guidance elements for the key steps of catheter and guidewire insertion. Novice medical staff can only rely on theoretical knowledge and limited observation experience to explore on their own, which not only prolongs the operation time of a single catheterization, but also easily causes adverse events such as vascular injury and catheter malposition due to improper operation, reducing the patient's medical experience and treatment safety; Third, during the traditional PICC puncture and catheterization process, medical staff need to hold the external sheath steady while pushing the catheter. However, the flexibility and stability of the human hand are greatly reduced when operating with one hand, and it is difficult to accurately control the pushing force and direction, resulting in frequent problems such as inaccurate catheter insertion depth and guide wire bending, which greatly affects the accuracy of catheterization, slows down the entire catheterization process, indirectly increases the risk of infection for patients, and is not conducive to the efficient implementation of subsequent treatment. Summary of the invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a PICC puncture and catheterization auxiliary device to solve the problems that the PICC puncture and catheterization auxiliary equipment in the existing technology is difficult to adapt to the arms of different patients, lacks the function of guiding or assisting medical staff who are not proficient in PICC catheterization, and some steps in the traditional PICC puncture and catheterization process require medical staff to operate with one hand, affecting the catheterization accuracy and efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides a PICC puncture catheterization intraoperative auxiliary device, comprising two splints, a plurality of clamp arms are movably provided on both side walls of the two splints, the splints are provided with a driving structure for driving the plurality of clamp arms to operate synchronously to clamp the arms of an external patient and a fixing structure for fixing the splint to an external operating bed, one of the splints is provided with a guiding structure for guiding an external catheter to be slowly inserted, and the other splint is provided with an auxiliary structure for fixing an external external sheath.

[0005] The advantages of adopting the above technical solution are: first, place the auxiliary device on the operating bed and make the bottom walls of the two splints contact the patient's wrist and arm respectively, that is, press on the patient's arm, and then fix the splint to the operating bed body through a fixed structure, adjust the angle and position of the splint according to the position and posture of the patient's arm to adapt to the patient's arm, start the driving structure, drive several clamping arms to operate synchronously, gently clamp the patient's arm between the two splints, adjust the clamping strength of the clamping arms according to the thickness of the patient's arm, ensure that the arm is firmly fixed but does not cause discomfort, place the catheter and guide wire on the guide structure of one of the splints, and the guide structure will provide an accurate insertion path for the catheter and guide wire. At the same time, the external sheath is placed on the auxiliary structure of another splint. The auxiliary structure will fix the external sheath in a suitable position so that medical staff can perform subsequent operations. When inserting the guide wire or catheter, the guide structure will assist and slowly push the catheter toward the position of the external sheath. At this time, the medical staff can align the catheter head with the entrance of the external sheath and insert it, so that the guide structure will slowly push the catheter so that the catheter is slowly inserted into the patient's body through the external sheath at a certain frequency, thereby completing the catheter insertion process and facilitating subsequent operations.

[0006] Through the setting of the above technical scheme, the position and strength of the clamp arm can be adjusted according to the different sizes and shapes of the patient's arm, so as to achieve a firm clamping of the patient's arm, thereby improving the versatility and adaptability of the equipment; the set guiding structure can provide accurate catheter and guidewire insertion paths for medical staff, help unskilled medical staff to better master catheterization skills, reduce operation difficulty and risks, and improve the success rate and safety of catheterization; the fixed structure fixes the splint to the operating table body, avoiding the movement of the patient's arm during the catheterization process, and the auxiliary structure can fix the external sheath, so that medical staff can operate with both hands, reducing the inconvenience caused by one-handed operation, thereby improving the accuracy and efficiency of catheterization, shortening the catheterization time, and alleviating the patient's pain.

[0007] The present invention further provides: the guide structure includes a guide plate attached to the corresponding splint, the guide plate is provided with an insertion groove for inserting an external catheter or guide wire along its length direction, the insertion groove is connected to the outer walls at both ends of the guide plate, and both side walls of the two insertion grooves are provided with guide grooves, a turntable is rotatably arranged in the guide groove, the turntable partially passes through the opening of the guide groove to be arranged at the insertion groove position, a guide cavity is hollowly opened on the guide plate, each of the guide grooves is connected to the guide cavity, the turntable is coaxially connected with a transmission gear, a plurality of the transmission gears are arranged at the guide cavity position, and the two adjacent transmission gears are meshed with each other, the side walls of the guide plate corresponding to the two insertion entrances are provided with small motors, the output ends of the two small motors are placed in the guide cavity and provided with linkage gears, the transmission gears close to the adjacent linkage gear positions are coaxially connected with matching gears, the two matching gears correspond to the two linkage gears one by one and are meshed, and the matching gears and the linkage gears are both helical gears.

[0008] The above technical solution is beneficial in that: the catheter or guidewire from the outside is introduced into the insertion slot from the insertion port. Due to the existence of the insertion slot, the catheter or guidewire is confined within a certain path, and preliminary preparations for catheter placement are started. The small motor corresponding to the insertion port position on the side wall of the guide plate is started, and the small motor starts to rotate to drive the linkage gear to rotate, and the linkage gear is meshed with the matching gear, and the matching gear drives the transmission gear coaxial with it to rotate synchronously, and the adjacent transmission gears are meshed with each other, so that several turntables rotate synchronously. During the rotation of the turntable, since it partially passes through the opening of the guide slot to the insertion slot position, it will contact and interact with the catheter in the insertion slot. Because the rotation directions of the two adjacent turntables are opposite, the movement direction of the catheter is restricted and moves with the synchronous rotation of the two turntables, thereby realizing the movement of the catheter from one insertion port to the other insertion port, until the catheter head passes through the insertion port and is located near the external sheath, so that it is convenient for medical staff to insert the catheter head into the external sheath and drive the catheter to be continuously and slowly inserted into the patient's body through the external sheath as the turntable continues to rotate; In the above technology, the insertion slot provides a clear insertion path for the external catheter or guidewire, so that medical staff can more accurately introduce the catheter or guidewire into the patient's body, avoiding the deviation of the catheter or guidewire during the insertion process, thereby improving the accuracy of catheterization and reducing the risk of vascular damage caused by operational errors; and a turntable is rotatably arranged in the guide slots on the two side walls of the insertion inlet at both ends of the insertion slot, and the turntable partially extends to the insertion slot position. The linkage gear is driven by a small motor, the linkage gear is meshed with the matching gear, and the matching gear is coaxially connected with the transmission gear, and the adjacent transmission gears are meshed with each other, realizing the coordinated drive of the turntable. This complex transmission system allows medical staff to accurately control the rotation of the turntable by controlling a small motor, thereby steadily pushing the catheter or guidewire forward along the insertion groove, providing stable propulsion and controllability for the insertion of the catheter and guidewire, and ensuring a smooth insertion process; the coordinated action of multiple transmission components allows medical staff to easily and accurately control the advancement of the catheter or guidewire by operating only a small motor, reducing instability and errors during manual operation, and helping to improve the convenience and efficiency of medical staff's operation, especially for medical staff who are not proficient in PICC catheterization. This automated and precisely controlled guide structure can greatly reduce the difficulty of operation; at the same time, the catheter can be placed on the guide plate in advance before the catheterization operation to reduce the duration of the catheterization operation and thereby alleviate the patient's pain, and a preset plate for placing medical devices or medical tubes can be extended at the front end of the guide plate according to actual usage needs and production needs, thereby facilitating medical staff to pick up medical devices for surgical operations.

[0009] The present invention further provides that: a plurality of abutment protrusions are evenly distributed annularly on the outer peripheral wall of the turntable and are used to pass through the guide groove to the insertion groove when the turntable rotates, and the radial cross section of the abutment protrusion is arranged in an arc shape.

[0010] The above technical solution is beneficial in that: the abutment protrusions uniformly distributed in the annular direction on the outer peripheral wall of the rotating disk have a circular arc-shaped radial cross section, and when the rotating disk rotates, these abutment protrusions will pass through the guide groove to the insertion groove. Due to their uniform distribution characteristics, they can provide multiple uniformly distributed contact points for the catheter or guide wire inserted into the groove. In the process of pushing the catheter or guidewire forward, these abutment protrusions can ensure that the catheter or guidewire is subjected to uniform thrust in the insertion groove, avoiding uneven force on the catheter or guidewire due to pushing at a single point or a few points, thereby enhancing the stability of the catheter or guidewire during advancement, allowing the catheter or guidewire to advance more smoothly along the established path of the insertion groove, reducing the possibility of deviation or distortion during advancement; and the design of the arc-shaped radial cross-section of the abutment protrusion, on the one hand, this shape can better fit the circular outer contour of the catheter or guidewire, making the contact with the catheter or guidewire softer during the advancement process, reducing the risk of scratches or damage to the surface of the catheter or guidewire caused by sharp edges; on the other hand, the arc-shaped structure can effectively disperse the thrust, avoiding damage to the catheter or guidewire due to excessive local pressure, ensuring that the catheter or guidewire maintains its integrity during advancement, and protecting PICC The safety and effectiveness of catheterization; since the abutment protrusion can evenly contact the catheter or guidewire and transmit thrust, when the turntable is rotated, the rotational power of the turntable can be more effectively converted into linear power to push the catheter or guidewire forward. Compared with no abutment protrusions or protrusions of other shapes, the propulsion effect is more significant, thereby improving the propulsion efficiency of the catheter or guidewire, helping to shorten the time required for the catheterization operation and providing medical staff with a more convenient operation experience.

[0011] The present invention further provides that: the guide plates are provided with separation holes at positions corresponding to the small motors, and the outer peripheral wall of the small motor is threadedly connected to the inner peripheral wall of the separation hole.

[0012] The above technical solution is beneficial in that: the guide plate has a separation hole corresponding to the position of the small motor, and the outer peripheral wall of the small motor is threadedly connected to the inner peripheral wall of the separation hole, which greatly facilitates the disinfection operation. After PICC puncture and catheterization, the device has close contact with the patient. To prevent cross infection, a strict disinfection process is essential. With the help of threaded connection, medical staff can easily unscrew the small motor from the separation hole to separate the guide plate from the motor. The separated guide plate and motor can be placed in professional disinfection equipment respectively for all-round and dead-angle disinfection, avoiding the situation that it is difficult to clean in place due to the complex structure of the motor and the presence of gaps, and effectively ensuring the sterility of the device when it is used next time, and building a strong line of defense for the patient's safe medical treatment; this detachable design is conducive to the separate maintenance of the small motor. Because the motor is in a medical environment for a long time, factors such as water vapor and disinfectant residue may affect its performance and service life. Being able to disassemble the motor, professionals can perform targeted maintenance work such as cleaning, drying, and performance testing on the motor, removing potential corrosion sources and hidden faults, which not only maintains the stable and efficient operation of the motor, but also indirectly extends the service life of the entire auxiliary device and reduces medical costs; if a small motor fails during use, the threaded connection method makes the replacement and repair of the motor simple and efficient. Without complex tools or professional maintenance skills, medical staff can quickly disassemble the problematic motor and replace it with a spare motor to ensure that the device can quickly resume normal use, minimize surgical delays caused by equipment failure, and maintain the smoothness of the PICC puncture catheterization process.

[0013] The present invention further provides: the auxiliary structure includes a fixed plate arranged on the corresponding clamping plate and a swing arm arranged on one side of the fixed plate, the swing arm is composed of a rotating rod and a rotating shaft, the end of the rotating rod is connected to the outer peripheral wall of the rotating shaft, the rotating shaft is connected to the side wall of the corresponding fixed plate, a movable ring is arranged on the rotating rod, a synchronous rod is connected to the outer peripheral wall of the movable ring, the synchronous rod and the rotating rod are arranged vertically relative to each other, the auxiliary structure also includes a main board arranged at the head end of the synchronous rod, a vertical plate is arranged at the starting end of the main board, a matching plate is movably arranged at the end of the main board, and the vertical plate and the matching plate are arranged relative to each other A plurality of movable holes are evenly distributed at the end of the main board along its width direction, and the opening direction of the movable holes is set in the same direction as the length direction of the main board. A limit shaft is set on the matching plate corresponding to each movable hole position, and each limit shaft is partially movably set in the corresponding movable hole. A reset spring is sleeved on each limit shaft, and the starting end of the reset spring is connected to the limit shaft, and the end of the reset spring is connected to the bottom wall of the movable hole. The gap between the vertical plate and the matching plate is matched to form an accommodating gap for accommodating an external sheath tube, and the inner wall of the vertical plate and the inner wall of the matching plate are both provided with wear-resistant rubber pads.

[0014] The advantages of adopting the above technical solution are: the medical staff holds the external sheath tube, and according to the actual operation convenience, rotates the rotating rod of the swing arm to rotate it around the rotating axis, and adjusts the angle and position of the swing arm until the fixed structure composed of the main board, the vertical plate and the matching plate is close to the external sheath tube, which is convenient for subsequent placement operations; the medical staff pushes the matching plate with their fingers to make the vertical plate and the matching plate relatively separated, and then places the external sheath tube in the accommodating gap between the vertical plate and the matching plate. After the sheath tube is placed, the medical staff can push the external sheath tube to place the external sheath tube into the patient's body. After the external sheath tube completes the puncture process, the medical staff releases the fingers squeezing the matching plate, and the elastic potential energy accumulated by the deformation of the reset spring is released and pushes the matching plate to move, so that the matching plate and the splint cooperate to tightly clamp the sheath tube, and then the wear-resistant rubber pad is used to firmly fix the external sheath tube from both sides, thereby completing the positioning and limiting of the punctured external sheath tube; in PICC During the puncture and catheterization process, the external sheath is stably fixed in the auxiliary structure, and medical staff can perform subsequent delicate operations such as catheter insertion with both hands without worrying about the external sheath shaking or shifting. When the catheterization operation is completed, the medical staff manually pulls open the mating plate, overcomes the elastic force of the return spring, increases the gap between the vertical plate and the mating plate, removes the external sheath from the accommodating gap, and returns the swing arm to its initial position, ready for the next use.

[0015] In the above technology, through the cooperation of the movable hole, the limit shaft and the reset spring, the matching plate can be flexibly moved relative to the main board, so that the accommodation gap between the vertical plate and the matching plate can be automatically adjusted according to the thickness of the external sheath. This adaptive adjustment mechanism can adapt to a variety of external sheaths of different specifications to meet the use needs of different patients or different medical scenarios, and improve the versatility of the device; the accommodation gap formed between the vertical plate and the matching plate is used to place the external sheath, and the two are arranged relative to each other, with wear-resistant rubber pads, which not only increases the friction between the sheath, but also firmly clamps the sheath from both sides, effectively preventing the sheath from shaking and shifting during the PICC puncture and catheterization process, ensuring the accuracy of the catheterization operation and reducing the risk of operational errors caused by sheath movement.

[0016] The present invention further provides: the rotating shaft is connected to the side wall of the fixed plate, the end of the rotating rod is penetrated by a through hole for the rotating shaft to pass through, the inner circumferential wall of the through hole and the outer circumferential wall of the rotating shaft are clearance-matched, a limit sleeve is inserted in the through hole, the limit sleeve is provided with a plug hole for the rotating shaft to be inserted along its length direction, the inner circumferential wall of the plug hole is circumferentially provided with a first tooth groove, the outer circumferential wall of the rotating shaft is circumferentially provided with a second tooth groove for mating and meshing with the first tooth groove, the inner circumferential wall of the through hole is circumferentially provided with a third tooth groove, and the outer circumferential wall of the limit sleeve is provided with a fourth tooth groove for meshing with the third tooth groove when the limit sleeve is fully inserted into the through hole and separating from the third tooth groove when the limit sleeve is partially out of the through hole.

[0017] The above technical solution is beneficial in that: the through hole of the rotating rod is aligned with the rotating shaft. Due to the clearance between the inner circumferential wall of the through hole and the outer circumferential wall of the rotating shaft, the rotating shaft can be smoothly inserted into the through hole, and then the limiting sleeve is inserted, so that the first tooth groove in the limiting sleeve insertion hole is aligned with the second tooth groove on the outer circumferential wall of the rotating shaft and gradually meshes. At the same time, it is ensured that the fourth tooth groove on the outer circumferential wall of the limiting sleeve is fully meshed with the third tooth groove on the inner circumferential wall of the through hole, and the entire installation process is completed. At this time, the swing arm is in a normal usable and fixed state. When it is necessary to adjust the position and inclination of the external sheath relative to the patient's wound When the angle is oblique, the operator pulls out the limit sleeve, so that the fourth tooth groove on the limit sleeve is separated from the third tooth groove. At this time, the medical staff holds the rotating rod according to actual needs and applies appropriate force to rotate it around the rotating shaft. The clearance between the perforation and the rotating shaft makes the rotation process smooth, and it can be adjusted to any suitable angle as needed. After the angle is completed, the operator can push the limit sleeve again to reset the limit sleeve. At this time, the third tooth groove and the fourth tooth groove are engaged and plugged, thereby realizing the fixation of the limit sleeve to the rotating rod, thereby limiting the movement of the external sheath. Through the plug-in engagement of the first tooth groove and the second tooth groove, accurate angle positioning can be achieved when the rotating rod rotates around the rotating shaft. This means that when using the auxiliary structure to fix the external sheath, the medical staff can stabilize the swing arm at the required angle, ensure that the sheath is fixed in the correct position, avoid affecting the catheterization operation due to angle deviation, and greatly improve the accuracy and stability of the operation; and the design of the limit sleeve not only realizes angle positioning, but also enhances the stability of the connection between the rotating rod and the rotating shaft. When the limit sleeve is fully inserted into the perforation, the fourth tooth groove is meshed with the third tooth groove, which is like adding double insurance to the connection between the rotating rod and the rotating shaft. Even in the case of frequent operation or certain external force, it can effectively prevent the loosening and displacement between the rotating rod and the rotating shaft, and ensure the reliability of the auxiliary structure during use; when the swing arm needs to be maintained, repaired or replaced, it is only necessary to partially remove the limit sleeve from the perforation to separate the fourth tooth groove from the third tooth groove, and the rotating rod and the rotating shaft can be easily disassembled. This design reduces the difficulty of maintenance, shortens the maintenance time, and is conducive to improving the utilization rate of the equipment and reducing surgical delays caused by equipment failure.

[0018] The present invention further provides that: a telescopic spring is connected between the end surface of the rotating shaft and the bottom wall of the insertion hole.

[0019] The above technical solution is beneficial in that after adjusting the swing arm angle, if it is required to automatically return to the initial or specific position, the elastic force of the telescopic spring can provide reset power. After the medical staff operates the rotating rod and releases their hand, the telescopic spring will push the limit sleeve and the rotating rod to move to the initial position, so that the first tooth groove and the second tooth groove, and the fourth tooth groove and the third tooth groove return to the preset meshing state. This automatic reset function not only improves the convenience of operation, but also reduces the occurrence of subsequent operations affected by the incorrect return of the swing arm angle due to human negligence.

[0020] The present invention is further provided that: the radial cross-section of the clamp arm is arranged in an arc shape, the clamp plate is provided with a swing groove corresponding to each clamp arm position, the clamp arm starting end is swingingly arranged in the corresponding swing groove, and adjustment shafts are rotatably arranged on the two side walls of the clamp plate, each of the adjustment shafts is coaxially connected to the ends of several clamp arms on the same side, the clamp plate is hollow and provided with an adjustment cavity, the driving structure includes an active shaft and a passive shaft arranged in the adjustment cavity, both ends of the two adjustment shafts are provided with adjustment gears, both ends of the active shafts are coaxially connected to active gears, and both ends of the passive shafts are connected to passive gears, the two adjustment gears on one of the adjustment shafts are respectively meshed with the two active gears, and the two adjustment gears on the other adjustment shaft are respectively meshed with the two passive gears, the two active gears are respectively meshed with the two passive gears, and the active shaft passing through the clamp plate is provided with a rotating wheel for external medical staff to rotate.

[0021] The above technical solution is beneficial in that: before performing PICC puncture and catheterization, the auxiliary device is placed in a suitable position and the patient's arm is ensured to be in a suitable position between the splints. At this time, the clamp arm is in the initial state and does not clamp the patient's arm. Then the medical staff holds the rotating wheel and rotates the rotating wheel clockwise or counterclockwise according to the thickness of the patient's arm and the actual clamping force required. The rotation of the rotating wheel drives the active shaft to rotate, and the active gears at both ends of the active shaft rotate accordingly. The adjusting gear on the adjusting shaft meshed with the active gear begins to rotate, thereby driving the adjusting shaft to rotate. Since the adjusting shaft is coaxially connected to the ends of several clamp arms on the same side, the ends of the clamp arms will swing with the rotation of the adjusting shaft. At the same time, the other adjusting shaft is linked with the active shaft through the passive shaft. Specifically, the active gear drives the passive gear to rotate, and the passive gear then drives the adjusting gear on the adjusting shaft meshing with it to rotate, thereby realizing the synchronous adjustment of the clamp arm on the other side, and then realizing the relative gathering of several clamp arms on both sides. In the process of rotating the wheel, the initial end of the clamp arm swings in the swing groove, and its arc-shaped radial cross-section gradually fits the patient's arm. The medical staff observes the fixation of the patient's arm and the patient's reaction, and stops rotating the wheel in time, so that the clamp arm firmly clamps the patient's arm with appropriate force, preparing for the PICC puncture and catheterization operation.

[0022] In the above technology, both side walls of the splint are provided with the same adjustment shaft and clamp arm driving structure, and the synchronous adjustment of the clamp arms on both sides is realized through the meshing relationship of the gears. This ensures that when clamping the patient's arm, the clamping force on both sides is evenly distributed, so that the arm is in a balanced state, further improving the stability of the fixation, which is beneficial to the subsequent PICC puncture and catheterization operation. Due to the precise meshing between the gears, the swing amplitude of the clamp arm can be accurately controlled when the wheel is turned, thereby realizing the precise adjustment of the clamping force. Medical staff can easily adjust the clamping force of the clamp arm according to the actual situation of the patient's arm, which not only ensures that the arm is firmly fixed, but also does not cause discomfort to the patient due to excessive clamping. At the same time, by turning the wheel, the active shaft can be easily driven to rotate. The active gear on the active shaft meshes with the adjustment gear on the adjustment shaft and the passive gear on the passive shaft to form a linkage system. This design allows medical staff to achieve synchronous adjustment of multiple clamp arms on the same side by operating only one rotating wheel, greatly improving the adjustment efficiency and saving operation time. The radial cross-section of the clamp arm is set in an arc shape, which can better fit the contour of the patient's arm, increase the contact area with the arm, and disperse the clamping force, making the patient more comfortable when the arm is fixed. At the same time, it also improves the stability of fixation and reduces arm shaking caused by poor contact between the clamp arm and the arm. An adjustment cavity is opened in the hollow of the splint, and the active shaft, passive shaft and other components of the drive structure are arranged in the adjustment cavity. Not only does it make the structure of the entire device more compact and reduce the occupied space, but it also protects the internal transmission components to avoid external interference or damage, thereby improving the reliability and service life of the device.

[0023] The present invention further provides that: the fixing structure includes a plurality of fixing legs arranged on the two side walls of the splint, the radial cross-section of the fixing legs is arranged in an arc shape, and the bottom of the fixing legs is provided with a suction cup for adsorbing and cooperating with the surface of the external operating table.

[0024] The above technical solution is beneficial in that: before performing PICC puncture and catheterization, the medical staff will carry the auxiliary device to the side of the operating bed, ensure that the device is in a normal usable state, pick up the auxiliary device, align the fixed legs on the two side walls of the splint with the operating bed, and then press the suction cup at the bottom of each fixed leg in turn to exhaust the air in the suction cup so that it is tightly adsorbed on the surface of the operating bed. During the pressing process, the medical staff needs to check the adsorption of each suction cup to ensure that the adsorption is firm and there is no sign of looseness. In the above technology, several fixed legs are set on the two side walls of the splint, and their radial cross-section is arc-shaped. This design can better fit the contour of the patient's arm and increase the contact area with the patient's arm. The suction cup at the bottom can generate a strong adsorption force to firmly fix the splint on the operating bed, effectively preventing the auxiliary device from shifting due to the movement of the patient or the external force of the medical staff during the operation during the PICC puncture and catheterization process, ensuring the stability of the entire operation process, and providing a strong guarantee for accurate catheterization.

[0025] The present invention further provides that: an elastic pad is wrapped on the inner peripheral wall of the clamp arm, and the elastic pad is made of a breathable elastic polyurethane material.

[0026] The advantages of adopting the above technical solution are: the elastic pad wrapped around the inner wall of the clamp arm in the above technology is made of a breathable elastic polyurethane material, which has good flexibility and elasticity. When the clamp arm clamps the patient's arm, the elastic pad can be adaptively adjusted according to the shape of the arm, evenly dispersing the clamping force, avoiding the pressure and discomfort caused by the clamp arm directly contacting the arm, making the patient more comfortable during the catheterization process, reducing unnecessary movement caused by physical discomfort, and helping to improve the smooth progress of the catheterization operation. The elastic pad made of breathable elastic polyurethane material has good air permeability, which can effectively promote air circulation and reduce sweat accumulation at the contact point between the patient's arm and the clamp arm. This not only makes the patient feel more comfortable, but also reduces the risk of bacteria breeding in a humid environment, helps to keep the patient's skin dry and hygienic, reduces potential skin infection problems, and protects the patient's health. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional view of the present invention; Figure 2 A three-dimensional view of a splint with a guide structure according to the present invention; Figure 3 for Figure 2 Locally separated 3D views; Figure 4 A three-dimensional view of the splint with auxiliary structure in the present invention Figure 5 An exploded three-dimensional view of the auxiliary structure in the present invention; Figure 6 This is an exploded three-dimensional view of the splint in the present invention. DETAILED DESCRIPTION

[0028] The present invention provides an auxiliary device for PICC puncture and catheterization, comprising two splints 1, a plurality of clamp arms 2 are movably arranged on both side walls of the two splints 1, the splints 1 are provided with a driving structure for driving the plurality of clamp arms 2 to synchronously operate to clamp the arms of an external patient and a fixing structure for fixing the splint 1 to an external operating table, one of the splints 1 is provided with a guiding structure for guiding an external catheter to be slowly inserted, and the other splint 1 is provided with an auxiliary structure for fixing an external external sheath, the guiding structure comprises a guide plate 3 attached to the corresponding splint 1, the guide plate 3 is provided with an insertion groove 31 for inserting an external catheter or a guide wire along its length direction, and the insertion groove 31 is connected to both ends of the guide plate 3 The outer wall is provided with an insertion port 311, and the two side walls of the two insertion ports 311 are provided with a guide groove 32. A turntable 321 is rotatably arranged in the guide groove 32, and the turntable 321 partially passes through the opening of the guide groove 32 to the insertion position of the insertion slot 31. A guide cavity 312 is hollowly provided on the guide plate 3, and each of the guide grooves 32 is connected to the guide cavity 312. The turntable 321 is coaxially connected with a transmission gear 322, and a plurality of the transmission gears 322 are arranged at the position of the guide cavity 312, and the two adjacent transmission gears 322 are meshed with each other. Small motors 33 are arranged at the positions of the two insertion ports 311 on the side walls of the guide plate 3, and the output ends of the two small motors 33 are placed in the guide cavity 312. A linkage gear 331 is provided, and a transmission gear 322 near the adjacent linkage gear 331 is coaxially connected with a matching gear 323, and the two matching gears 323 correspond to and mesh with the two linkage gears 331 one by one, and the matching gears 323 and the linkage gear 331 are both helical gears, and a plurality of abutment protrusions 324 for passing through the guide groove 32 to be inserted into the groove 31 when the turntable 321 rotates are evenly distributed on the outer peripheral wall of the turntable 321 in an annular direction, and the radial cross-section of the abutment protrusion 324 is arranged in an arc shape, and the guide plate 3 is provided with a separation hole 332 at the position corresponding to the small motor 33, and the outer peripheral wall of the small motor 33 is threadedly connected with the inner peripheral wall of the separation hole 332, and the auxiliary structure includes a plurality of abutment protrusions 324 arranged on the corresponding clamping plate 1. A fixed plate 4 and a swing arm arranged on one side of the fixed plate 4, the swing arm is composed of a rotating rod 41 and a rotating shaft 42, the end of the rotating rod 41 is connected to the outer peripheral wall of the rotating shaft 42, the rotating shaft 42 is connected to the corresponding side wall of the fixed plate 4, a movable ring 411 is arranged on the rotating rod 41, a synchronous rod 412 is connected to the outer peripheral wall of the movable ring 411, the synchronous rod 412 is arranged vertically relative to the rotating rod 41, the auxiliary structure also includes a main board 413 arranged at the head end of the synchronous rod 412, a vertical plate 43 is arranged at the beginning end of the main board 413, a matching plate 44 is movably arranged at the end of the main board 413, the vertical plate 43 is arranged opposite to the matching plate 44, and a plurality of movable holes 414 are evenly distributed at the end of the main board 413 along its width direction,The opening direction of the movable hole 414 is arranged in accordance with the length direction of the main board 413, and a limiting shaft 441 is arranged on the matching plate 44 corresponding to each movable hole 414. Each limiting shaft 441 is partially movably arranged in the corresponding movable hole 414, and a return spring 442 is sleeved on each limiting shaft 441. The starting end of the return spring 442 is connected to the limiting shaft 441, and the end of the return spring 442 is connected to the bottom wall of the movable hole 414. The clearance between the vertical plate 43 and the matching plate 44 is matched to form an accommodating gap 45 for accommodating an external sheath tube. The inner wall of the vertical plate 43 and the inner wall of the matching plate 44 are both provided with wear-resistant rubber pads. The rotating shaft 42 is connected to the side wall of the fixed plate 4, and the rotating rod 4 The end of the through hole 415 is penetrated by the through hole 415 for the shaft 42 to pass through, the inner circumferential wall of the through hole 415 is arranged with clearance matching with the outer circumferential wall of the shaft 42, a limiting sleeve 46 is inserted in the through hole 415, and the limiting sleeve 46 is provided with a plug hole 461 for the shaft 42 to be inserted along its length direction, the inner circumferential wall of the plug hole 461 is provided with a first tooth groove 462 in an annular direction, the outer circumferential wall of the shaft 42 is provided with a second tooth groove 421 for mating and meshing with the first tooth groove 462 in an annular direction, the inner circumferential wall of the through hole 415 is provided with a third tooth groove 416 in an annular direction, and the outer circumferential wall of the limiting sleeve 46 is provided with a tooth groove 416 for meshing with the third tooth groove 416 when the limiting sleeve 46 is fully inserted into the through hole 415 and for separating from the third tooth groove 416 when the limiting sleeve 46 is partially out of the through hole 415. The fourth tooth groove 463 is separated from the clamping plate 1, and a telescopic spring 422 is connected between the end face of the rotating shaft 42 and the bottom wall of the socket 461. The radial cross-section of the clamping arm 2 is arranged in an arc shape. The clamping plate 1 is provided with a swing groove 11 corresponding to the position of each clamping arm 2. The clamping arm 2 is swung in the corresponding swing groove 11. Adjustment shafts 12 are rotatably arranged on the two side walls of the clamping plate 1. Each of the adjustment shafts 12 is coaxially connected to the ends of several clamping arms 2 on the same side. The clamping plate 1 is hollow and has an adjustment cavity 13. The driving structure includes an active shaft 14 and a passive shaft 15 arranged in the adjustment cavity 13. Adjustment gears 121 are arranged at both ends of the two adjustment shafts 12. The active gears 141 are coaxially connected to the two ends of the active shaft 14. The passive gears 15 Both ends of the shaft 15 are connected with passive gears 151, the two adjusting gears 121 on one of the adjusting shafts 12 are respectively meshed with the two active gears 141, the two adjusting gears 121 on the other adjusting shaft 12 are respectively meshed with the two passive gears 151, the two active gears 141 are respectively meshed with the two passive gears 151, the active shaft 14 passes through the splint 1 and is provided with a rotating wheel 142 for external medical staff to rotate, the fixed structure includes a plurality of fixed legs 21 arranged on the two side walls of the splint 1, the radial cross section of the fixed leg 21 is arranged in an arc shape, the bottom of the fixed leg 21 is provided with a suction cup 22 for adsorption and cooperation with the surface of the external operating bed, the inner peripheral wall of the clamp arm 2 is wrapped with an elastic pad,The elastic pad is made of breathable elastic polyurethane material.

[0029] In the above technology, in order to ensure that the clamp arm can be fixed and limited after swinging, a fixing sleeve 5 is sleeved on the rotating wheel 142, and a fifth tooth groove 51 is circumferentially formed on the inner peripheral wall of the shaft hole of the fixing sleeve 5, and a sixth tooth groove 143 for plugging and meshing with the fifth tooth groove is formed on the outer peripheral wall of the rotating wheel 142, and a through hole 16 for the driving shaft 14 to pass through is formed on the clamping plate 1, and a seventh tooth groove 161 is circumferentially formed on the inner peripheral wall of the through hole 16, and an eighth tooth groove 52 for plugging and meshing with the seventh tooth groove 161 is formed on the outer peripheral wall of the fixing sleeve 5. Through the meshing of the sixth tooth groove with the fifth tooth groove, the clamping plate 1 is provided with a through hole 16 for the driving shaft 14 to pass through, and a seventh tooth groove 161 is circumferentially formed on the inner peripheral wall of the through hole 16, and an eighth tooth groove 52 for plugging and meshing with the seventh tooth groove 161 is formed on the outer peripheral wall of the fixing sleeve 5. The fixing sleeve and the rotating wheel are fixedly connected by the engagement of the seventh tooth groove and the eighth tooth groove, and the fixing sleeve and the through hole are fixedly connected, thereby realizing the fixing and limiting of the driving shaft in the through hole, thereby ensuring that the driving shaft will not rotate axially, and then the clamping arm is limited and fixed after it swings, so that the plurality of clamping arms can stably clamp and limit the patient's arm; in the above-mentioned technology, the fixing shaft can be rotated or cannot be rotated by plugging and pulling out the fixing sleeve, thereby facilitating the operation of medical staff; the above-mentioned technology is only illustrated in the drawings of the specification, and its structure and shape are not limited.

[0030] The main board and the synchronization rod in the above technology are connected by a hinge structure, that is, the main board can move relative to the head end of the synchronization rod, so that the main board can swing toward the other splint direction, and then the external sheath can be moved in a small range after being placed in the accommodating gap, thereby improving the stability of the external sheath clamping during puncture and facilitating medical staff to adjust in a small range according to puncture requirements and puncture. The small range movement rate is affected by the connection strength of the hinge structure, that is, when the connection state of the hinge structure is too hard, its movement rate is slower, that is, when the medical staff swings the main board to make the external sheath swing relatively, a larger force needs to be applied to the main board to make the main board swing, thereby ensuring that if the main board is loaded with external stress during the puncture, it will not swing or shake in a large range, thereby improving the stability of the external sheath, thereby improving the puncture efficiency and puncture accuracy. The hinge structure in the above technology is a prior art, so its structure and function will not be described in detail. It is marked as 6 in the attached figure of the specification, and it is only illustrated in the attached figure of the specification, and its structure and shape are not limited.

[0031] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A PICC puncture catheterization intraoperative auxiliary device, characterized in that: It comprises two splints, both side walls of which are movably provided with a plurality of clamping arms, the splints are provided with a driving structure for driving the plurality of clamping arms to operate synchronously to clamp the arms of an external patient and a fixing structure for fixing the splint to an external operating bed body, one of the splints is provided with a guiding structure for guiding an external catheter to be slowly inserted, and the other splint is provided with an auxiliary structure for fixing an external external sheath.

2. A PICC puncture catheterization auxiliary device according to claim 1, characterized in that: The guide structure includes a guide plate attached to a corresponding splint, wherein an insertion groove for inserting an external catheter or guide wire is provided on the guide plate along its length direction, the insertion groove is connected to an insertion entrance provided on the outer wall at both ends of the guide plate, and guide grooves are provided on both side walls of the two insertion entrances, a turntable is rotatably arranged in the guide groove, and the turntable partially passes through the opening of the guide groove to be arranged at the insertion groove position, a guide cavity is hollowly opened on the guide plate, each of the guide grooves is connected to the guide cavity, the turntable is coaxially connected with a transmission gear, and several of the transmission gears are arranged at the guide cavity position, and the two adjacent transmission gears are meshed with each other, and small motors are provided at the two insertion entrance positions of the guide plate side walls, and the output ends of the two small motors are placed in the guide cavity and provided with linkage gears, and the transmission gears close to the adjacent linkage gear positions are coaxially connected with matching gears, and the two matching gears correspond to and mesh with the two linkage gears one by one, and the matching gears and the linkage gears are both helical gears.

3. A PICC puncture catheterization auxiliary device according to claim 2, characterized in that: A plurality of abutment protrusions are evenly distributed on the outer peripheral wall of the turntable in an annular direction and are used to pass through the guide groove to the insertion groove when the turntable rotates. The radial cross section of the abutment protrusion is arranged in an arc shape.

4. The PICC puncture and catheterization auxiliary device according to claim 2, characterized in that: The guide plates are provided with separation holes at positions corresponding to the small motors, and the outer peripheral wall of the small motor is threadedly connected with the inner peripheral wall of the separation hole.

5. The PICC puncture and catheterization auxiliary device according to claim 1, characterized in that: The auxiliary structure includes a fixed plate arranged on the corresponding clamping plate and a swing arm arranged on one side of the fixed plate, the swing arm is composed of a rotating rod and a rotating shaft, the end of the rotating rod is connected to the outer peripheral wall of the rotating shaft, the rotating shaft is connected to the side wall of the corresponding fixed plate, a movable ring is arranged on the rotating rod, a synchronous rod is connected to the outer peripheral wall of the movable ring, the synchronous rod and the rotating rod are arranged vertically relative to each other, the auxiliary structure also includes a main board arranged at the head end of the synchronous rod, a vertical plate is arranged at the starting end of the main board, a matching plate is movably arranged at the end of the main board, the vertical plate is arranged relative to the matching plate, and the main A number of movable holes are evenly distributed at the end of the plate along its width direction, and the opening direction of the movable holes is set in accordance with the length direction of the main board. A limit shaft is set on the matching plate corresponding to each movable hole position, and each of the limit shafts is partially movably set in the corresponding movable hole. A reset spring is sleeved on each limit shaft, and the starting end of the reset spring is connected to the limit shaft, and the end of the reset spring is connected to the bottom wall of the movable hole. The gap between the vertical plate and the matching plate is matched to form an accommodating gap for accommodating an external sheath tube, and the inner wall of the vertical plate and the inner wall of the matching plate are both provided with wear-resistant rubber pads.

6. The PICC puncture and catheterization auxiliary device according to claim 5, characterized in that: The rotating shaft is connected to the side wall of the fixed plate, and a through hole is passed through the end of the rotating rod for the rotating shaft to pass through. The inner circumferential wall of the through hole and the outer circumferential wall of the rotating shaft are clearance-matched, a limiting sleeve is inserted in the through hole, and the limiting sleeve is provided with a plug hole for the rotating shaft to be inserted along its length direction. The inner circumferential wall of the plug hole is circumferentially provided with a first tooth groove, and the outer circumferential wall of the rotating shaft is circumferentially provided with a second tooth groove for mating and meshing with the first tooth groove. The inner circumferential wall of the through hole is circumferentially provided with a third tooth groove, and the outer circumferential wall of the limiting sleeve is provided with a fourth tooth groove for meshing with the third tooth groove when the limiting sleeve is fully inserted into the through hole and separating from the third tooth groove when the limiting sleeve is partially out of the through hole.

7. The PICC puncture and catheterization auxiliary device according to claim 6, characterized in that: A telescopic spring is connected between the end surface of the rotating shaft and the bottom wall of the insertion hole.

8. The PICC puncture and catheterization auxiliary device according to claim 1, characterized in that: The radial cross-section of the clamp arm is arranged in an arc shape, the clamp plate is provided with a swing groove corresponding to each clamp arm position, the clamp arm starting end is swingingly arranged in the corresponding swing groove, and adjustment shafts are rotatably arranged on the two side walls of the clamp plate, each of the adjustment shafts is coaxially connected to the ends of several clamp arms on the same side, and the clamp plate is hollow with an adjustment cavity, and the driving structure includes an active shaft and a passive shaft arranged in the adjustment cavity, and both ends of the two adjustment shafts are provided with adjustment gears, both ends of the active shafts are coaxially connected to active gears, and both ends of the passive shafts are connected to passive gears, the two adjustment gears on one of the adjustment shafts are respectively meshed with the two active gears, and the two adjustment gears on the other adjustment shaft are respectively meshed with the two passive gears, and the two active gears are respectively meshed with the two passive gears, and the active shaft passing through the clamp plate is provided with a rotating wheel for external medical staff to rotate.

9. The PICC puncture and catheterization auxiliary device according to claim 1, characterized in that: The fixing structure comprises a plurality of fixing legs arranged on the two side walls of the splint, the radial cross section of the fixing legs is arranged in an arc shape, and the bottom of the fixing legs is provided with a suction cup for adsorbing and cooperating with the surface of the external operating table.

10. The PICC puncture and catheterization auxiliary device according to claim 1, characterized in that: The inner peripheral wall of the clamp arm is wrapped with an elastic pad, and the elastic pad is made of a breathable elastic polyurethane material.

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