Central venous pressure measuring device

Abstract

The utility model discloses a central venous pressure measuring device which comprises a measuring scale, scale marks and a fixing groove penetrating up and down are arranged on one end face of the measuring scale, a pressure measuring tube is arranged in the fixing groove, a three-way valve is arranged at the bottom end of the pressure measuring tube, an annular buckle is arranged on one side of the base, and the measuring scale is arranged on the other side of the base. The upper end of the measuring scale is hinged to the base, the lower end of the base is provided with a swing groove with the hinge point of the upper end as the circle center, the lower end of the measuring scale is provided with a screw, the screw is inserted into the swing groove in a swing mode, the screw is further in threaded connection with a nut blocking the outer side of the base, and the measuring scale and the base can be locked by screwing the nut; the upper end of the measuring scale is hinged to the base, and the swing groove in the lower end of the measuring scale takes the hinge point of the upper end as the circle center, so that the measuring scale can adaptively swing under the action of gravity when the nut is loosened, the measuring scale can be kept in a vertical state no matter whether an infusion rod used for fixing the device is in a vertical state or not, and the accuracy of a measured value is further ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring device technical field, in particular to a central venous pressure measuring device. BACKGROUND

[0002] Central venous pressure determination is the right atrial pressure, and it is one of main indexes in observing hemodynamics in clinic, and it is influenced by many factors, and the most important is three factors, right heart pump function, circulating blood volume and body circulation venous system vascular tension degree, and the size of central venous pressure in clinic depends on the interrelation between heart ejection capacity and venous return blood volume, when meeting the patient of heart failure in clinic, generally, central venous pressure can be determined, and right heart ejection function can be determined, which plays a guiding significance for the treatment of patient.

[0003] The existing venous measuring scale cannot adjust the liquid inlet rate of the pressure measuring tube in the process of use, the infusion tube enters the pressure measuring tube at too high liquid flow rate, and the inaccuracy of zero point positioning of the pressure measuring tube and the inconvenient height adjustment of the measuring scale are caused by the untimely switch adjustment and spilling.

[0004] The prior art has been improved, for example, the patent document with the authorized announcement number CN 215839025 U discloses a central venous pressure measuring device, which is fixed on the infusion stand through the U-shaped buckle, and the zero point position of the device is aligned with the intercostal midaxillary line position through the direct light, and the infusion regulator arranged on the pressure measuring tube reduces the physiological saline injection rate when physiological saline is injected, and the blocking is facilitated.

[0005] However, when using, if the infusion stand is not in the vertical state, the measuring scale in the device will not be in the vertical state when the device is fixed on the infusion stand through the U-shaped buckle, and then the measured value is inaccurate. UTILITY MODEL CONTENT

[0006] The utility model provides a central venous pressure measuring device, and the technical problems to be solved are that the measuring scale can keep the vertical state, and then the accuracy of measured value is ensured.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] The utility model provides a central venous pressure measuring device, including the measuring scale, one end of the measuring scale is provided with scale line and fixed slot through the upper and lower, and the fixed slot is provided with pressure measuring tube, the bottom of pressure measuring tube is provided with three way valve, still including the base, one side of the base is provided with annular buckle, the measuring scale sets up in the other side of base, and the upper end is hinged with the base, the lower end of base is provided with the swing groove with the upper end hinge point as the center, the lower end of measuring scale is provided with screw rod, the screw rod is swingably inserted into swing groove, and the screw rod is still screw thread connection has the nut that blocks in the outside of base, can lock the measuring scale and base through the screwing of nut.

[0009] As the further improvement of the above technical solution:

[0010] In at least one embodiment, one end of the annular buckle is provided with a notch, and the width of the notch is smaller than the diameter of the elastic ring, and the other end of the annular buckle is fixedly connected with the base.

[0011] Further, in at least one embodiment, the annular buckle is further provided with an elastic assembly, the elastic assembly comprises an arc-shaped clamping block, a sliding rod and a spring, the arc-shaped clamping block is arranged in the annular buckle, one end of the sliding rod is inserted into the annular buckle and fixedly connected with one side of the protrusion of the arc-shaped clamping block, the other end is provided with a blocking block, the spring is sleeved on the sliding rod, and the two ends are respectively abutted with the arc-shaped clamping block and the annular buckle.

[0012] Further, in at least one embodiment, the cross section of the sliding rod is rectangular, and the annular buckle is provided with a through hole matching the shape of the cross section of the sliding rod.

[0013] Further, in at least one embodiment, both ends of the annular buckle adjacent to one end of the notch are provided with elastic assemblies, and the elastic assemblies at both ends are symmetrically arranged.

[0014] Compared with the prior art, the central venous pressure measuring device of the utility model has at least the following beneficial effects: the upper end of the measuring scale is hinged with the base, and the swing groove at the lower end is with the upper end hinge point as the center, so that when the nut is loosened, the measuring scale can swing adaptively under the action of gravity, whether the infusion rod for fixing the device is in a vertical state or not, the measuring scale can keep vertical state, thereby ensuring the accuracy of the measured value. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0016] Figure 1 It is the structure schematic view of the use state of one embodiment of the utility model;

[0017] Figure 2 It is the explosion drawing of one embodiment of the utility model;

[0018] Figure 3 It is the structure view of the elastic assembly in one embodiment of the utility model;

[0019] Figure 4 It is the sectional view of the infusion regulator in one embodiment of the utility model.

[0020] The figure mark is: 1, measuring scale, 2, pressure measuring tube, 3, base, 4, elastic assembly, 5, infusion regulator, 6, convex lens, 7, laser direct light, 11, scale line, 12, fixed groove, 13, screw rod, 14, nut, 15, T-shaped sliding slot, 21, three-way valve, 31, annular buckle, 32, swing groove, 41, arc-shaped clamping block, 42, sliding rod, 43, spring, 44, blocking block, 51, shell, 52, roller, 61, U-shaped adjusting rod, 62, sliding block, 311, notch, 312, through hole, 511, bottom wall, 512, movable groove, 513, rack, 521, pin shaft, 522, gear. DETAILED DESCRIPTION

[0021] The application will be described in detail below with reference to the exemplary embodiments in the drawings. It should be understood that the application can be realized in various forms, and should not be understood as being limited to the embodiments set forth herein. The embodiments are provided to make the disclosure of the application more complete and to fully convey the concept of the application to those skilled in the art.

[0022] In the description of the application, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0023] In view of the defect that the measurement value is inaccurate due to the fact that the measuring scale is not in a vertical state during use in the prior art, the inventor has found through careful analysis that the reason for the above problem of the existing central venous pressure measuring device is mainly that the measuring scale is fixed to the infusion stand through the U-shaped buckle, and the measuring scale and the U-shaped buckle cannot adaptively swing, that is, when the infusion stand for fixation is inclined, the measuring scale fixed to the infusion stand will also be inclined. Based on the above analysis, the inventor has improved the structure of the measuring scale fixation.

[0024] As shown in Figures 1-4 , a central venous pressure measuring device in the present application comprises a measuring scale 1, a pressure measuring tube 2, a base 3, an elastic assembly 4, an infusion regulator 5, a convex lens 6 and a laser direct light 7.

[0025] Among them, referring to Figure 1 and Figure 2 , one end face of the measuring scale 1 is provided with scale lines 11 and a through-fixed slot 12, and the fixed slot 12 is provided with the pressure measuring tube 2, the bottom end of the pressure measuring tube 2 is provided with a three-way valve 21, one side of the base 3 is provided with an annular buckle 31, the measuring scale 1 is arranged on the other side of the base 3, and the upper end is hingedly connected to the base 3, the lower end of the base 3 is provided with a swing groove 32 with the upper end hinge point as the center, the lower end of the measuring scale 1 is provided with a screw rod 13, the screw rod 13 is swingably inserted into the swing groove 32, and a nut 14 is further threadedly connected to the screw rod 13 outside the base 3, and the measuring scale 1 and the base 3 can be locked by tightening the nut 14.

[0026] The upper end of the measuring scale 1 is hingedly connected to the base 3, and the swing groove 32 at the lower end is with the upper end hinge point as the center, so that under the action of gravity, the measuring scale 1 can adaptively swing, whether the infusion rod for fixing the device is in a vertical state or not, the measuring scale 1 can remain vertical, and in order to avoid the measuring scale 1 from swinging during measurement, the nut 14 at the lower end can be tightened to lock the measuring scale 1 and the base 3 after the measuring scale 1 adaptively swings to a vertical state.

[0027] Secondly, one end of the annular buckle 31 is provided with a notch 311, and the width of the notch 311 is smaller than the diameter of the elastic ring, and the other end of the annular buckle 31 is fixedly connected to the base 3. The annular buckle 31 is provided with an elastic assembly 4 adjacent to both ends of the notch 311, and the elastic assemblies 4 at both ends are symmetrically arranged.

[0028] Referring to Figure 2 and Figure 3The elastic assembly 4 is arranged on the annular buckle 31, and the elastic assembly 4 comprises an arc-shaped clamping block 41, a sliding rod 42 and a spring 43. The arc-shaped clamping block 41 is arranged in the annular buckle 31. One end of the sliding rod 42 is inserted into the annular buckle 31 and is fixedly connected with a protruding side of the arc-shaped clamping block 41. The other end of the sliding rod 42 is provided with a blocking block 44. The spring 43 is sleeved on the sliding rod 42 and is in abutment with the arc-shaped clamping block 41 and the annular buckle 31 at both ends.

[0029] The annular buckle 31 is provided with a notch 311 at one end. The annular buckle 31 can be in abutment with the infusion stand from the notch 311. The elastic assembly 4 arranged symmetrically at both ends of the annular buckle 31 can enable the annular buckle 31 to be in abutment and fixed on infusion rods with different diameters, thereby increasing the applicability of the device.

[0030] The sliding rod 42 has a rectangular cross section. The annular buckle 31 is provided with a through hole 312 matching the cross-sectional shape of the sliding rod 42. Therefore, the sliding rod 42 can only slide and cannot rotate.

[0031] Reference Figure 2 And Figure 4 The infusion regulator 5 is arranged on the pressure measuring tube 2 and located between the measuring scale 1 and the three-way valve 21. The infusion regulator 5 comprises a shell 51 and a roller 52. The shell 51 is provided with an inclined bottom wall 511. The bottom wall 511 is provided with movable grooves 512 at both sides. The roller 52 is provided with pin shafts 521 at both ends. The roller 52 is connected with the shell 51 by inserting the pin shafts 521 into the movable grooves 512. One end of the roller 52 extends out of the shell 51. The pressure measuring tube 2 passes through the shell 51 at both ends and is located between the bottom wall 511 and the roller 52.

[0032] The pressure measuring tube 2 is located between the bottom wall 511 and the roller 52. The bottom wall 511 is an inclined surface. The position of the roller 52 can be adjusted to change the degree of compression of the pressure measuring tube 2, thereby adjusting the liquid inlet speed of the pressure measuring tube 2. Therefore, the injection rate of the physiological saline can be adjusted when the physiological saline is injected. At the same time, the physiological saline can be conveniently blocked.

[0033] The pin shafts 521 are provided with gears 522. The movable grooves 512 are provided with racks 513 on the side walls. The roller 52 can make the gears 522 engage with the racks 513 under the elastic action of the pressure measuring tube 2. When it is necessary to adjust the liquid inlet speed of the pressure measuring tube 2, the gears 522 can be disengaged from the racks 513 by pressing the roller 52 downward, so that the position of the roller 52 can be normally adjusted. After the adjustment is completed, the gears 522 engage with the racks 513 under the elastic action of the pressure measuring tube 2. The non-intentional movement of the roller 52 during use can be avoided, and the liquid inlet speed of the pressure measuring tube 2 can be prevented from being changed non-subjectively.

[0034] The convex lens 6 is arranged on the front side of the measuring scale 1, one side of the convex lens 6 is fixedly connected with a U-shaped adjusting rod 61, and the overhanging end of the U-shaped adjusting rod 61 is provided with a sliding block 62, and one side of the measuring scale 1 is provided with a T-shaped sliding groove 15 matched with the sliding block 62, and the sliding block 62 is slidably and dampingly inserted into the T-shaped sliding groove 15.

[0035] There is a friction force between the sliding block 62 and the T-shaped sliding groove 15, so that after adjusting the position of the convex lens 6, the convex lens 6 and the measuring scale 1 will not actively slide relative to each other due to the existence of the friction force, and the position of the liquid surface can be enlarged and displayed through the convex lens 6, so as to facilitate reading the measured value.

[0036] The laser direct lamp 7 is arranged at the side of the measuring scale 1, and the center of the laser direct lamp 7 is flush with the zero point of the scale line 11, and the laser direct lamp 7 can emit direct light, so as to facilitate aligning the zero point position of the measuring scale 1 with the position of the intercostal midaxillary line of the patient.

[0037] Use steps:

[0038] A. The device is fixed on the infusion support through the annular buckle 31 arranged on the rear side of the base 3 and the elastic assembly 4 arranged on the annular buckle 31;

[0039] B. Loosen the nut 14 at the lower end of the measuring scale 1, so that the measuring scale 1 can adaptively swing under the action of gravity, so that the measuring scale 1 remains in a vertical state;

[0040] C. The laser direct lamp 7 is irradiated on the patient's body, the connecting position of the device and the infusion support is adjusted, the zero point position of the device is adjusted to be aligned with the intercostal midaxillary line of the patient, and then the measuring scale 1 and the base 3 are locked by tightening the nut 14;

[0041] D. The infusion tube and the deep vein catheter are communicated with the three-way valve 21, the three-way valve 21 is turned to the physiological saline and the pressure measuring tube 2, the infusion regulator 5 is controlled, the liquid inflow rate of the pressure measuring tube 2 is adjusted, when the liquid in the pressure measuring tube 2 flows higher than the expected CVP, the physiological saline injection is blocked;

[0042] E. Wait for the liquid level in the pressure measuring tube 2 to drop, when it drops to a certain level and does not drop any more, the value of the liquid level on the measuring scale 1 at this time is the CVP value, and the position of the liquid level can be enlarged and displayed through the convex lens 6, the value is read and recorded.

[0043] It should be understood that all the above embodiments are exemplary but not limiting, and various modifications or variations of the above described specific embodiments made by those skilled in the art under the concept of the utility model should be within the protection scope of the utility model.

Claims

1. A central venous pressure measuring device, comprising a measuring ruler (1), wherein one end face of the measuring ruler (1) is provided with a scale line (11) and a through-hole fixing groove (12), and a pressure measuring tube (2) is provided in the fixing groove (12), and a three-way valve (21) is provided at the bottom end of the pressure measuring tube (2), characterized in that: It also includes a base (3), on one side of which is provided a ring buckle (31). The measuring ruler (1) is provided on the other side of the base (3) and its upper end is hinged to the base (3). The lower end of the base (3) is provided with a swing groove (32) centered on the upper hinge point. The lower end of the measuring ruler (1) is provided with a screw (13). The screw (13) can be swung into the swing groove (32). The screw (13) is also threaded with a nut (14) that blocks the outside of the base (3). By tightening the nut (14), the measuring ruler (1) and the base (3) can be locked.

2. The central venous pressure measuring device according to claim 1, characterized in that: One end of the ring buckle (31) is provided with a notch (311), and the width of the notch (311) is smaller than the diameter of the elastic ring. The other end of the ring buckle (31) is fixedly connected to the base (3).

3. The central venous pressure measuring device according to claim 2, characterized in that: The ring buckle (31) is also provided with an elastic component (4). The elastic component (4) includes an arc-shaped locking block (41), a sliding rod (42) and a spring (43). The arc-shaped locking block (41) is disposed inside the ring buckle (31). One end of the sliding rod (42) is inserted into the ring buckle (31) and fixedly connected to the protruding side of the arc-shaped locking block (41). The other end is provided with a blocking block (44). The spring (43) is sleeved on the sliding rod (42) and its two ends abut against the arc-shaped locking block (41) and the ring buckle (31) respectively.

4. The central venous pressure measuring device according to claim 3, characterized in that: The sliding rod (42) has a rectangular cross-section, and the ring buckle (31) is provided with a through hole (312) that matches the cross-sectional shape of the sliding rod (42).

5. The central venous pressure measuring device according to any one of claims 2-4, characterized in that: The ring buckle (31) is provided with elastic components (4) at both ends adjacent to one end of the notch (311), and the elastic components (4) at both ends are symmetrically arranged.

6. The central venous pressure measuring device according to claim 1, characterized in that: The pressure measuring tube (2) is also equipped with an infusion regulator (5). The infusion regulator (5) includes a housing (51) and a roller (52). The housing (51) has an inclined bottom wall (511) inside, and movable grooves (512) are provided on both sides of the bottom wall (511). The roller (52) has pins (521) at both ends. The roller (52) is inserted into the movable groove (512) through the pins (521) and connected to the housing (51). One end of the roller (52) extends out of the outside of the housing (51). The pressure measuring tube (2) passes through the housing (51) from both ends and is located exactly between the bottom wall (511) and the roller (52).

7. The central venous pressure measuring device according to claim 6, characterized in that: A gear (522) is provided on the pin (521), and a rack (513) is provided on the upper side wall of the movable groove (512). The roller (52) can mesh with the gear (522) and the rack (513) under the elastic action of the pressure measuring tube (2).

8. The central venous pressure measuring device according to claim 1, characterized in that: A convex lens (6) is also provided on the front side of the measuring ruler (1). A U-shaped adjusting rod (61) is fixedly connected to one side of the convex lens (6), and a slider (62) is provided on the suspended end of the U-shaped adjusting rod (61). A T-shaped groove (15) adapted to the slider (62) is provided on one side of the measuring ruler (1). The slider (62) is slidably and dampedly inserted into the T-shaped groove (15).

9. The central venous pressure measuring device according to claim 1, characterized in that: A laser direct light (7) is also provided on the side of the measuring ruler (1), and the center of the laser direct light (7) is flush with the zero point of the scale line (11).

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