A peripheral indwelling needle integrated central venous pressure measuring device

Abstract

The application relates to the technical field of medical devices and discloses an integrated central venous pressure measuring device of a peripheral indwelling needle, which comprises an indwining needle, a hose fixedly connected to an input end of the indwining needle, a connecting assembly installed at one end of the hose away from the indwining needle, a plug fixedly connected to an end face of the hose away from the indwining needle, a tube clamp slidingly connected to the outer surface of the hose and a connecting seat fixedly connected to the outer surface of the plug. The application is characterized in that the sealing block is driven to slide by pressing the convex plate to make the sliding cavity present negative pressure, the baffle is opened to facilitate the connection of the syringe and the plug, the protection structure can prevent infection, after the connection, the convex plate pressure is rapidly increased to drive the sealing disc to slide, the two limiting cavities are pressurized, the saline in the hose enters the glass measuring tube through the horizontal groove to drive the silicone rubber plate to slide, the central venous pressure is directly and accurately measured through the scale line, and reliable basis is provided for the clinic.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a peripheral indwelling needle integrated central venous pressure measuring device. BACKGROUND

[0002] The peripheral indwelling needle is a very common medical device in modern clinical medicine, its appearance has brought significant benefits to patients, greatly reducing the pain suffered by patients from repeated puncture. In actual medical scenarios, especially for patients who need long-term infusion treatment, such as chronic disease patients, postoperative rehabilitation patients, etc., if puncture is performed every time infusion is performed, not only will it cause damage to the patient's blood vessels, increase the patient's physical burden, but also will cause fear and anxiety to the patient psychologically. The use of the peripheral indwelling needle only needs to be punctured once, and can be used multiple times within a certain period of time, effectively avoiding the trouble of repeated puncture, and improving the patient's medical experience.

[0003] However, although the peripheral indwelling needle performs well in intravenous infusion, it has certain limitations. The original design of the traditional peripheral indwelling needle is mainly to meet the needs of intravenous infusion, and its structure and function determine that it cannot be directly used for central venous pressure measurement. Central venous pressure, as an important indicator of right heart function and blood volume, is of great guiding significance for clinicians to judge the patient's condition and develop a reasonable treatment plan, especially in terms of fluid management, shock treatment and cardiovascular disease treatment. However, the traditional peripheral indwelling needle lacks key components such as pressure sensing devices, signal transmission and processing systems required for accurate measurement of central venous pressure, and cannot directly obtain central venous pressure data. This limitation has greatly limited the application of peripheral indwelling needles in clinical monitoring, making doctors have to choose more complex and risky central venous catheterization and other methods to measure central venous pressure when they need to know the patient's central venous pressure in real time. This undoubtedly increases the medical risk and economic burden of patients. The peripheral indwelling needle is commonly used for intravenous infusion, although it can reduce the pain of repeated puncture of patients, but the traditional peripheral indwelling needle cannot be directly used for central venous pressure measurement, which limits its application in clinical monitoring.

[0004] Therefore, the technical personnel in the art provide a peripheral indwelling needle integrated central venous pressure measuring device to solve the problems raised in the background art. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the deficiencies of the prior art, the present application provides a peripheral indwelling needle integrated central venous pressure measuring device, which solves the problem that the traditional peripheral indwelling needle cannot be directly used for central venous pressure measurement, which limits its application in clinical monitoring.

[0007] (II) Technical Solution

[0008] To achieve the above object, the present application provides the following technical solution: a peripheral indwelling needle integrated central venous pressure measuring device, comprising a hose fixedly connected to the input end of the indwelling needle, an end of the hose away from the indwelling needle is provided with a connecting assembly, the end surface of the hose away from the indwelling needle is fixedly connected with a plug, and the outer surface of the hose is slidably connected with a tube clamp.

[0009] The connecting assembly comprises a connecting seat fixedly connected to the outer surface of the plug, a slot is formed in the center of the top of the connecting seat, sliding cavities are formed in the both sides of the inner part of the connecting seat and located on both sides of the slot, a sealing plate is sealingly and slidably connected in the inner part of the sliding cavities, a baffle is fixedly connected to the surface center of the sealing plate close to the connecting seat, a communication pipe is fixedly connected in the inner part of the connecting seat and communicates with the inner part of the sliding cavities, a sealing cavity is formed in the inner part of the connecting seat, a sealing block is sealingly and slidably connected in the inner part of the sealing cavity, a fixed rod is fixedly connected to the surface center of the sealing block, a convex plate is fixedly connected to the surface of the sealing block away from the fixed rod, silica gel blocks are fixedly connected to the both sides of the inner part of the sealing cavity and located on both sides of the fixed rod, a pressurizing cavity is formed in the inner part of the connecting seat, a sealing disc is sealingly and slidably connected in the inner part of the pressurizing cavity, a spring is movably installed in the inner part of the pressurizing cavity, a first air pipe is fixedly connected in the inner part of the connecting seat and communicates with the inner part of the pressurizing cavity, a sealing assembly is installed at an end of the first air pipe away from the pressurizing cavity, a square groove is formed in the inner part of the connecting seat, a measuring assembly is installed in the inner part of the square groove, a glass plate is fixedly connected in the inner part of the square groove, and an exhaust pipe is fixedly connected to the output end of the measuring assembly.

[0010] Preferably, the surface of the baffle away from the sealing plate is fixedly connected with silica gel sealing pads, the number of the silica gel sealing pads is two, the two baffles are sealingly and tightly attached together through the silica gel sealing pads, and the outer surface of the baffle is sealingly and tightly inserted into the inner part of the slot.

[0011] Preferably, the inner part of the sliding cavity is in a strong pressure state, and the end of the inner part of the sliding cavity away from the slot is connected in communication with the left end of the inner part of the sealing cavity through the communication pipe.

[0012] Preferably, under normal conditions, the elasticity of the silica gel blocks makes the sealing block slide in the direction away from the plug, and the outer surface of the fixed rod is slidably connected in the inner part of the connecting seat.

[0013] Preferably, under normal conditions, the elasticity of the spring makes the sealing disc slide in the direction close to the fixed rod, the inner part of the pressurizing cavity and the inner part of the first air pipe are both in a negative pressure state, the top end of the outer surface of the plug is arc-shaped, and the bottom of the baffle is arc-shaped.

[0014] Preferably, the measuring assembly comprises a glass measuring tube fixedly connected inside the square groove, the inside of the glass measuring tube is fixedly connected with an upper positioning block and a lower positioning block, a silicon rubber plate is sealingly and slidably connected between the upper positioning block and the lower positioning block inside the glass measuring tube, the surface of the glass measuring tube is provided with scale lines, a measuring hole is formed in the side surface of the top end of the glass measuring tube inside the glass measuring tube, and a bottom hole is formed in the bottom of the glass measuring tube.

[0015] The sealing assembly comprises a horizontal groove, a first limiting cavity and a second limiting cavity formed in the inside of the connecting seat, the inside of the first limiting cavity is sealingly and slidably connected with a first movable plate, the surface of the first movable plate is fixedly connected with a first sealing plug plate, the inside of the connecting seat is fixedly connected with a second air pipe in communication with the inside of the first air pipe, the inside of the connecting seat is fixedly provided with a deflation groove, the inside of the connecting seat is provided with an exhaust groove in communication with the bottom end of the inside of the glass measuring tube, the inside of the second limiting cavity is sealingly and slidably connected with a second movable plate, and the surface of the second movable plate is fixedly connected with a second sealing plug plate.

[0016] Preferably, the outer surface of the first sealing plug plate is sealingly and plug-connected in the inside of the horizontal groove, and the surface of the second sealing plug plate extends in the inside of the exhaust groove.

[0017] Preferably, the top end of the inside of the second limiting cavity is in communication with the inside of the second limiting cavity through the second air pipe, and the second air pipe is in communication with the inside of the pressurizing cavity through the first air pipe.

[0018] Preferably, the top end of the inside of the glass measuring tube is in communication with the outside of the connecting seat through the exhaust pipe, the inside of the glass measuring tube is in communication with the inside of the bottom hole and the exhaust groove, and the end of the exhaust groove away from the glass measuring tube extends to the outer surface of the connecting seat.

[0019] Preferably, the top end of the inside of the first limiting cavity is in communication with the outside of the connecting seat through the deflation groove, and the right end of the inside of the second limiting cavity is in communication with the outside of the connecting seat through the deflation groove.

[0020] (Three) beneficial effects

[0021] Compared with the prior art, the present application provides a peripheral indwelling needle integrated central venous pressure measuring device, which has the following beneficial effects:

[0022] 1. The peripherally indwelling needle integrated central venous pressure measuring device, by pressing the convex plate, the sealing block can be driven to slide, and the inside of the sliding cavity is under negative pressure, after the baffle is opened, the syringe and the plug can be connected, this protection structure can avoid infection caused by direct contact of the plug with the outside world, after the syringe is connected with the plug, the sealing disc can be driven to slide by increasing the pressure on the convex plate, the inside top of the first limiting cavity and the inside left end of the second limiting cavity can be pressurized at the same time, the saline inside the hose can enter the inside of the glass measuring tube through the transverse groove, drive the silicone rubber plate to slide, and measure the central venous pressure result through the scale line, an intuitive reading mode is provided, the central venous pressure value can be more accurately reflected, and reliable basis is provided for clinical diagnosis and treatment.

[0023] 2. The peripherally indwelling needle integrated central venous pressure measuring device, by setting the exhaust groove, when the central venous pressure does not need to be measured, the inside of the glass measuring tube is in communication with the outside of the connecting seat through the exhaust groove, then the syringe is connected with the exhaust pipe, and the inside of the glass measuring tube is pressurized, the sliding of the silicone rubber plate can be reset to zero, the influence of residual factors of the last measurement on the next measurement is eliminated, it is ensured that each measurement starts from an accurate zero point, and the reliability of the measurement data is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The structure diagram of the peripherally indwelling needle integrated central venous pressure measuring device is provided.

[0025] Figure 2 The connection structure diagram of the hose and the connecting assembly in the peripherally indwelling needle integrated central venous pressure measuring device is provided.

[0026] Figure 3 The transverse sectional view of Figure 2 The transverse sectional view of

[0027] Figure 4 The connection diagram of the sealing plate and the baffle in the peripherally indwitting needle integrated central venous pressure measuring device is provided.

[0028] Figure 5 The enlarged view of A in Figure 3 The enlarged view of A in

[0029] Figure 6 The connection diagram of the sealing block and the convex plate in the peripherally indwitting needle integrated central venous pressure measuring device is provided.

[0030] Figure 7 The structure diagram of the plug in the peripherally indwitting needle integrated central venous pressure measuring device is provided.

[0031] Figure 8 A structure diagram of a measuring assembly in a peripheral indwelling needle integrated central venous pressure measuring device according to the present application is provided;

[0032] Figure 9 For Figure 3 An enlarged view at B in the middle.

[0033] In the figure: 1, indwelling needle; 2, hose; 21, plug; 22, pipe clamp; 3, connecting assembly; 31, connecting seat; 32, insertion slot; 33, sliding cavity; 34, sealing plate; 35, baffle; 351, silicone sealing pad; 36, communication pipe; 37, sealing cavity; 38, sealing block; 39, fixing rod; 310, convex plate; 311, silicone block; 312, booster cavity; 313, sealing disc; 314, spring; 315, first vent pipe; 316, sealing assembly; 3161, transverse groove; 3162, first limiting cavity; 3163, first movable plate; 3164, first sealing insertion plate; 3165, second vent pipe; 3169, air release groove; 31610, air exhaust groove; 31611, second limiting cavity; 31612, second movable plate; 31613, second sealing insertion plate; 317, measuring assembly; 3171, glass measuring tube; 3172, upper positioning block; 3174, scale line; 3175, silicone rubber plate; 3176, lower positioning block; 3177, measuring hole; 3178, bottom hole; 318, square groove; 319, glass plate; 320, air exhaust pipe. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] Please refer to Figures 1-9 A peripheral indwelling needle integrated central venous pressure measuring device, comprising an indwelling needle 1, a hose 2 fixedly connected to an input end of the indwelling needle 1, a connecting assembly 3 installed at an end of the hose 2 away from the indwelling needle 1, a plug 21 fixedly connected to an end surface of the hose 2 away from the indwelling needle 1, and a pipe clamp 22 slidingly connected to an outer surface of the hose 2.

[0036] The connecting assembly 3 comprises a connecting seat 31 fixedly connected to the outer surface of the plug 21, a slot 32 is formed at the top center of the connecting seat 31, sliding cavities 33 are formed at both sides of the slot 32 in the interior of the connecting seat 31, a sealing plate 34 is sealingly and slidingly connected in the interior of the sliding cavity 33, a baffle 35 is fixedly connected to the surface center of the sealing plate 34 close to the connecting seat 31, a communication pipe 36 is fixedly connected in the interior of the connecting seat 31 and communicates with the interior of the sliding cavity 33, a sealing cavity 37 is formed in the interior of the connecting seat 31, a sealing block 38 is sealingly and slidingly connected in the interior of the sealing cavity 37, a fixed rod 39 is fixedly connected to the surface center of the sealing block 38, a convex plate 310 is fixedly connected to the surface of the sealing block 38 away from the fixed rod 39, silica gel blocks 311 are fixedly connected to both sides of the fixed rod 39 in the interior of the sealing cavity 37, a pressurizing cavity 312 is formed in the interior of the connecting seat 31, a sealing disc 313 is sealingly and slidingly connected in the interior of the pressurizing cavity 312, springs 314 are movably installed in the interior of the pressurizing cavity 312, a first air pipe 315 is fixedly connected in the interior of the connecting seat 31 and communicates with the interior of the pressurizing cavity 312, a sealing assembly 316 is installed at one end of the first air pipe 315 away from the pressurizing cavity 312, a square groove 318 is formed in the interior of the connecting seat 31, a measuring assembly 317 is installed in the interior of the square groove 318, a glass plate 319 is fixedly connected in the interior of the square groove 318, and an exhaust pipe 320 is fixedly connected to the output end of the measuring assembly 317. By pressing the convex plate 310, the sealing block 38 can be driven to slide, and the interior of the sliding cavity 33 is under negative pressure. After the baffle 35 is opened, the syringe can be conveniently connected with the plug 21. This protective structure can avoid infection caused by direct contact of the plug 21 with the outside world.

[0037] The surface of the baffle 35 away from the sealing plate 34 is fixedly connected with silica gel sealing pads 351, the number of the silica gel sealing pads 351 is two, the two baffles 35 are sealingly and adhesively connected together through the silica gel sealing pads 351, and the outer surface of the baffle 35 is sealingly and plug-connected in the interior of the slot 32. By arranging the silica gel sealing pads 351, the sealing property of the interior of the slot 32 after the two baffles 35 are closed can be improved.

[0038] The interior of the sliding cavity 33 is under strong pressure, one end of the sliding cavity 33 away from the slot 32 is in communication with the left end of the interior of the sealing cavity 37 through the communication pipe 36, and the two baffles 35 can abut against each other due to the strong pressure in the interior of the sliding cavity 33.

[0039] Under normal circumstances, the elasticity of the silica gel blocks 311 enables the sealing block 38 to slide away from the plug 21, and the outer surface of the fixed rod 39 is slidingly connected in the interior of the connecting seat 31. By arranging the silica gel blocks 311, the sliding of the sealing block 38 can be quickly reset when no external force is applied to the convex plate 310.

[0040] In normal state, the elasticity of the spring 314 makes the sealing disc 313 slide to the direction of the fixed rod 39, the inside of the pressure chamber 312 and the inside of the first air pipe 315 are in negative pressure state, the top end of the outer surface of the plug 21 is arc-shaped, the bottom of the baffle 35 is arc-shaped, through the setting of the spring 314, when the sealing disc 313 is not abutted by the fixed rod 39, the sliding of the sealing disc 313 can be quickly reset.

[0041] The measuring assembly 317 comprises a glass measuring tube 3171 fixedly connected in the square groove 318, the inside of the glass measuring tube 3171 is fixedly connected with an upper positioning block 3172 and a lower positioning block 3176, the inside of the glass measuring tube 3171 is sealingly and slidably connected with a silicon rubber plate 3175 between the upper positioning block 3172 and the lower positioning block 3176, the surface of the glass measuring tube 3171 is provided with a scale line 3174, the inside top end of the glass measuring tube 3171 is provided with a measuring hole 3177 in the side surface of the glass measuring tube 3171, and the bottom of the glass measuring tube 3171 is provided with a bottom hole 3178.

[0042] The sealing assembly 316 comprises a horizontal groove 3161, a first limiting cavity 3162 and a second limiting cavity 31611 formed in the inside of the connecting seat 31, the inside of the first limiting cavity 3162 is sealingly and slidably connected with a first movable plate 3163, the surface of the first movable plate 3163 is fixedly connected with a first sealing plug plate 3164, the inside of the connecting seat 31 is fixedly connected with a second air pipe 3165 in communication with the inside of the first air pipe 315, the inside of the connecting seat 31 is fixedly provided with a gas discharge groove 3169, the inside of the connecting seat 31 is provided with an exhaust groove 31610 in communication with the inside bottom end of the glass measuring tube 3171, the inside of the second limiting cavity 31611 is sealingly and slidably connected with a second movable plate 31612, and the surface of the second movable plate 31612 is fixedly connected with a second sealing plug plate 31613.

[0043] The outer surface of the first sealing plug plate 3164 is sealingly inserted into the inside of the horizontal groove 3161, and the surface of the second sealing plug plate 31613 extends into the inside of the exhaust groove 31610, when the inside of the horizontal groove 3161 is sealed, the inside of the exhaust groove 31610 is in an open state, and the inside of the glass measuring tube 3171 can be depressurized.

[0044] The inner top end of the second limiting cavity 31611 is connected with the inside of the second limiting cavity 31611 through the second air pipe 3165, and the second air pipe 3165 is connected with the inside of the pressurized cavity 312 through the first air pipe 315.

[0045] The inner top end of the glass measuring tube 3171 is connected with the outside of the connecting seat 31 through the exhaust pipe 320, and the inside of the glass measuring tube 3171 is connected with the inside of the bottom hole 3178 and the exhaust groove 31610, and the end of the exhaust groove 31610 away from the glass measuring tube 3171 extends to the outer surface of the connecting seat 31. By arranging the exhaust groove 31610, the reset sliding of the silicone rubber plate 3175 can be realized.

[0046] The inner top end of the first limiting cavity 3162 is connected with the outside of the connecting seat 31 through the air release groove 3169, and the inner right end of the second limiting cavity 31611 is connected with the outside of the connecting seat 31 through the air release groove 3169. By arranging the air release groove 3169, the smooth sliding of the first movable plate 3163 and the second movable plate 31612 can be ensured.

[0047] In summary, when the peripheral indwelling needle integrated central venous pressure measuring device is used, first, the tube 2 is clamped by the tube clamp 22, then the syringe is filled with physiological saline, and the syringe output end is sleeved with a soft sleeve, the connecting seat 31 is held by hand, and pressure is applied to the lug plate 310, at this time the lug plate 310 drives the sealing block 38 to slide to the right, so that the left end of the sealing cavity 37 is in a negative pressure state, and the sliding cavity 33 is in a negative pressure state through the communication pipe 36, the sealing plate 34 drives the baffle 35 to slide away from the insertion slot 32, at this time the fixed rod 39 is not in contact with the surface of the sealing disc 313, then the syringe output end sleeve is sleeved in the plug 21, at this time the pressure applied to the lug plate 310 can be stopped, the surface of the baffle 35 is clamped on the outer surface of the syringe, and the tube clamp 22 is removed, then the physiological saline is injected into the tube 2 through the syringe, after filling, the plunger of the syringe is not rotated, then a larger pressure is applied to the lug plate 310, at this time the lug plate 310 drives the fixed rod 39 to slide to the right through the sealing block 38, and drives the sealing disc 313 to slide to the right through the abutting of the fixed rod 39 and the sealing disc 313, and makes the top end of the first limiting cavity 3162 inside be in a strong pressure state through the first air pipe 315 and the second air pipe 3165, at the same time, the left end of the second limiting cavity 31611 inside is in a strong pressure state, the second movable plate 31612 drives the second sealing insert plate 31613 to slide to the right, and seals the inside of the exhaust groove 31610, the first movable plate 3163 drives the first sealing insert plate 3164 to slide downward, at this time the inside of the plug 21 is connected with the inside of the glass measuring tube 3171 through the transverse groove 3161 and the measuring hole 3177, the physiological saline flows back to the transverse groove 3161 and the glass measuring tube 3171, and drives the silicone rubber plate 3175 to slide upward, when the silicone rubber plate 3175 slides to a stable position, the value is read through the scale line 3174 and recorded, after the detection is completed, the pressure applied to the lug plate 310 is stopped, the sealing disc 313 slides to the left through the elasticity of the spring 314, at this time the first sealing insert plate 3164 slides upward to seal the inside of the transverse groove 3161, the second sealing insert plate 31613 slides to the left to make the bottom end of the glass measuring tube 3171 inside connected with the outside atmospheric pressure, then the syringe is connected with the exhaust pipe 320, and the pressure applied to the inside of the glass measuring tube 3171 can reset the sliding of the silicone rubber plate 3175 to zero, finally, after the excess physiological saline is sucked out through the syringe, the tube 2 can be clamped through the tube clamp 22.

[0048] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A peripherally inserted central venous pressure measuring device, comprising an indwelling needle (1) and a flexible tube (2) fixedly connected to the input end of the indwelling needle (1), characterized in that: A connecting component (3) is installed at the end of the hose (2) away from the indwelling needle (1), a plug (21) is fixedly connected to the end face of the hose (2) away from the indwelling needle (1), and a tube clamp (22) is slidably connected to the outer surface of the hose (2); The connecting assembly (3) includes a connecting seat (31) fixedly connected to the outer surface of the plug (21). A slot (32) is provided at the top center of the connecting seat (31). Sliding cavities (33) are provided on both sides of the slot (32) inside the connecting seat (31). A sealing plate (34) is slidably connected inside the sliding cavity (33). A baffle (35) is fixedly connected to the center of the surface of the sealing plate (34) near the connecting seat (31). A connecting pipe (36) communicating with the inside of the sliding cavity (33) is fixedly connected inside the connecting seat (31). A sealing cavity (37) is provided inside the connecting seat (31). A sealing block (38) is slidably connected inside the sealing cavity (37). A fixing rod (39) is fixedly connected to the center of the surface of the sealing block (38). A protruding plate (31) is fixedly connected to the surface of the sealing block (38) away from the fixing rod (39). 0), the sealing cavity (37) is fixedly connected to silicone blocks (311) on both sides of the fixed rod (39), the connecting seat (31) is provided with a pressure chamber (312), the pressure chamber (312) is sealed and slidably connected with a sealing disc (313), the pressure chamber (312) is movably installed with a spring (314), the connecting seat (31) is fixedly connected with a first vent pipe (315) communicating with the inside of the pressure chamber (312), the end of the first vent pipe (315) away from the pressure chamber (312) is equipped with a sealing component (316), the connecting seat (31) is provided with a square groove (318), the square groove (318) is installed with a measuring component (317), the square groove (318) is fixedly connected with a glass plate (319), and the output end of the measuring component (317) is fixedly connected with an exhaust pipe (320).

2. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 1, characterized in that: The surface of the baffle (35) away from the sealing plate (34) is fixedly connected with a silicone sealing gasket (351). There are two silicone sealing gaskets (351). The two baffles (35) are sealed together by the silicone sealing gaskets (351). The outer surface of the baffle (35) is sealed and inserted into the inside of the slot (32).

3. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 1, characterized in that: The interior of the sliding cavity (33) is under high pressure. The end of the sliding cavity (33) away from the slot (32) is connected to the left end of the sealed cavity (37) through the connecting pipe (36).

4. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 1, characterized in that: Under normal conditions, the elasticity of the silicone block (311) causes the sealing block (38) to slide away from the plug (21), and the outer surface of the fixing rod (39) is slidably connected to the inside of the connector (31).

5. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 1, characterized in that: Under normal conditions, the elasticity of the spring (314) causes the sealing disc (313) to slide towards the fixed rod (39). The inside of the pressurizing chamber (312) and the inside of the first vent pipe (315) are both under negative pressure. The top of the outer surface of the plug (21) is arc-shaped, and the bottom of the baffle (35) is arc-shaped.

6. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 1, characterized in that: The measuring component (317) includes a glass measuring tube (3171) fixedly connected inside a square groove (318). An upper positioning block (3172) and a lower positioning block (3176) are fixedly connected inside the glass measuring tube (3171). A silicone rubber plate (3175) is sealed and slidably connected between the upper positioning block (3172) and the lower positioning block (3176) inside the glass measuring tube (3171). A scale line (3174) is provided on the surface of the glass measuring tube (3171). A measuring hole (3177) is opened on the side of the top glass measuring tube (3171) inside the glass measuring tube (3171). A bottom hole (3178) is opened at the bottom of the glass measuring tube (3171). The sealing assembly (316) includes a transverse groove (3161), a first limiting cavity (3162), and a second limiting cavity (31611) formed inside the connecting seat (31). The first limiting cavity (3162) is slidably connected to a first movable plate (3163). The surface of the first movable plate (3163) is fixedly connected to a first sealing insert plate (3164). The connecting seat (31) is fixedly connected to a second vent pipe (3165) that communicates with the inside of the first vent pipe (315). The connecting seat (31) is fixedly provided with a vent groove (3169). The connecting seat (31) is provided with an exhaust groove (31610) that communicates with the bottom of the glass measuring tube (3171). The second limiting cavity (31611) is slidably connected to a second movable plate (31612). The surface of the second movable plate (31612) is fixedly connected to a second sealing insert plate (31613).

7. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 6, characterized in that: The outer surface of the first sealing insert (3164) is sealed and inserted into the interior of the transverse groove (3161), and the surface of the second sealing insert (31613) extends into the interior of the exhaust groove (31610).

8. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 6, characterized in that: The top end of the second limiting cavity (31611) is connected to the interior of the second limiting cavity (31611) through the second vent pipe (3165), and the second vent pipe (3165) is connected to the interior of the pressurization cavity (312) through the first vent pipe (315).

9. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 6, characterized in that: The inner top of the glass measuring tube (3171) is connected to the outside of the connecting seat (31) through the exhaust pipe (320). The inside of the glass measuring tube (3171) is connected to the inside of the exhaust groove (31610) through the bottom hole (3178). The end of the exhaust groove (31610) away from the glass measuring tube (3171) extends to the outer surface of the connecting seat (31).

10. The integrated central venous pressure measuring device with a peripherally inserted needle according to claim 6, characterized in that: The top end of the first limiting cavity (3162) is connected to the outside of the connecting seat (31) through the vent groove (3169), and the right end of the second limiting cavity (31611) is connected to the outside of the connecting seat (31) through the vent groove (3169).

Images