A pressure-controlled syringe with a pre-tightened force storage member
By using pre-tightening accumulators and clamping mechanisms in the pressure-controlled syringe, a controllable pressure of 80-120 mm mercury is achieved, which solves the problem of uncontrollable syringe pressure in the prior art, and improves the safety and patency during venous acquisition.
Patent Information
- Application Number
- CN202322807732.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-19
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2033-10-19
AI Technical Summary
The syringes used in prior art in coronary artery bypass grafting cannot effectively control the injection pressure, resulting in mechanical damage to the large saphenous vein and the small saphenous vein during acquisition, reducing the long-term patency of the bridge blood vessels.
A pressure-controlled syringe with a pre-tightening accumulator is designed, and by providing a clamping mechanism on the push rod, the pre-tightening accumulator is to apply a pressure of 80-120 mm of mercury to the syringe.
A safer and controllable injection pressure is achieved, reducing mechanical damage to the veins, improving long-term patency of bridge vessels, and reducing the risk of cross-infection.
Smart Images
Figure CN222708785U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment, in particular to a pressure-controlled syringe with a pre-tightened force storage piece. Background Art
[0002] According to the "China Cardiovascular Health and Disease Report 2020", the current number of people suffering from coronary heart disease has reached 11.39 million, and 40,000 patients require coronary artery bypass grafting surgery each year.
[0003] Usually, peripheral superficial veins (such as the great saphenous vein or the small saphenous vein) are used as bridge vessels for coronary artery bypass grafting. Among them, the great saphenous vein is the most commonly used bridge vessel in coronary artery bypass grafting. Conventional incision or laparoscopic minimally invasive acquisition during surgery, as well as the use of bridge vessels for bypass surgery after acquisition, will cause spasm of the great saphenous vein. Currently, the most commonly used method for spasm relief of the great saphenous vein during surgery is manual pressure expansion with a manual syringe. However, the pressure of the manual syringe is uncontrollable, and the injection pressure is as high as 700 mmHg. This high pressure directly causes severe mechanical damage to the great saphenous vein when the great saphenous vein is obtained - "endothelial cell stripping and smooth muscle stress injury", which leads to the pathological reconstruction of the great saphenous vein itself and reduces the long-term patency of the obtained great saphenous vein as a bridge vessel. The peripheral superficial veins represented by the small saphenous vein will also have this kind of pathological reconstruction problem of the vein itself due to the pressure expansion of the manual syringe, which will also reduce the long-term patency of the small saphenous vein as a bridge vessel.
[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content
[0005] In view of the problems existing in the prior art, the utility model proposes a pressure-controlled syringe with a pre-tightened force storage member, the syringe comprising:
[0006] A syringe (2), the front end of which is used as an injection end, and the rear end of which is provided with a syringe tail end surface (5);
[0007] A push rod (6), wherein
[0008] A push rod (6) extends into one end of the syringe and is connected to a plunger (3);
[0009] A force storage member (4) is provided between the plunger (3) and the end face (5) of the syringe tail, and the force storage member (4) is pre-tightened so that the plunger (3) applies a pressure of 80-120 mm Hg into the syringe (2).
[0010] Preferably,
[0011] The push rod (6) is provided with at least one clamping mechanism for pre-tightening the force storage member (4), and the force storage member (4) is pre-tightened by the clamping mechanism so that the plunger (3) applies a pressure of 80-120 mm Hg into the syringe (2).
[0012] Preferably,
[0013] The clamping mechanism is a deformable component, comprising a pair of symmetrically arranged clamping parts (6a) and clamping parts (6b) arranged on the push rod (6), wherein when the push rod (6) is pulled out of the syringe (2), the clamping parts (6a) and the clamping parts (6b) act as a pair of clamping parts, unfold and clamp on the plane where the end face (5) of the syringe tail is located.
[0014] Preferably,
[0015] The clamping mechanism is a non-deformable component, comprising a groove (62) arranged on the push rod (6), wherein when the push rod (6) is pulled out of the syringe (2), the groove (62) is clamped on the plane where the end surface (5) of the syringe tail is located.
[0016] Preferably,
[0017] The number of the symmetrical snap-in parts is a plurality of pairs to realize a plurality of snap-in mechanisms, and the plurality of pairs of snap-in parts are sequentially arranged on the push rod (6) in the direction from the front end to the rear end of the syringe; wherein, when the push rod (6) is pulled out of the syringe (2), the plurality of pairs of snap-in parts can be sequentially unfolded and snap-into the plane where the end face (5) of the rear end of the syringe is located.
[0018] Preferably,
[0019] The number of the grooves is multiple so as to realize multiple snap-fit mechanisms, and the multiple grooves are sequentially arranged on the push rod (6) in the direction from the front end to the rear end of the syringe; wherein, when the push rod (6) is pulled out of the syringe (2), the multiple grooves can be sequentially snap-fitted to the plane where the rear end face (5) of the syringe is located.
[0020] Preferably,
[0021] The syringe is disposable.
[0022] Preferably,
[0023] The force storage member is a spring.
[0024] Preferably,
[0025] The force storage member is an electromagnetic energy storage member, and when the force storage member is an electromagnetic energy storage member, the syringe does not need to be provided with a needle.
[0026] The utility model has the following advantages:
[0027] The utility model realizes a pressure-controlled syringe with a pre-tightened force storage member, which can be used as a spasm-relieving device when a peripheral superficial vein (great saphenous vein or small saphenous vein, etc.) is used as a bridge vessel, and has the following beneficial effects:
[0028] 1) Safer: Through the clamping mechanism of the pressure-controlled syringe disclosed in the utility model, a safer pressure of 80-120 mm Hg is achieved;
[0029] 2) More controllable: When multiple clamping mechanisms are set, the pressure can be flexibly adjusted to a pressure value between 80-120 mmHg that is more suitable for the current patient during surgery;
[0030] 3) Simple structure and low cost;
[0031] 4) Can be used once to avoid cross infection, etc.;
[0032] 5) It can be further realized as a vacuum-sealed structure pre-loaded with antispasmodic drugs, and the solid solution of the antispasmodic drugs can be pre-loaded in the syringe in advance. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the utility model will become clear to those of ordinary skill in the art. The drawings in the specification are only used for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the utility model. Obviously, the drawings described below are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.
[0034] In the attached picture:
[0035] Figure 1 1 is an overall schematic diagram of a pressure-controlled injector with a pre-tightened force storage member in one embodiment of the utility model, wherein:
[0036] 1 is a needle;
[0037] 2 is a syringe;
[0038] 3 is a plunger;
[0039] 4 is a power storage member;
[0040] 5 is the end face of the tail of the syringe;
[0041] 6 is a putter;
[0042] Figure 2 It is a schematic diagram of the end face of the tail of the syringe, the push rod and the clamping mechanism in one embodiment of the utility model, wherein:
[0043] 6a and 6b are both clamping parts, and the two form a pair.
[0044] Figure 3 It is a schematic diagram of another implementation scheme of the push rod, the clamping mechanism, and the end surface of the tail of the syringe in one embodiment of the utility model, wherein:
[0045] 61 is the end of the push rod 6;
[0046] 62 is a groove, and Figure 3 A plurality of grooves are shown in FIG.
[0047] 51 is a hole for engaging the groove 62;
[0048] 52 is a hole for preventing 61 from passing through;
[0049] 53 is a horizontal surface for easy holding and pressing. DETAILED DESCRIPTION
[0050] The following will refer to the attached Figures 1 to 3 Specific embodiments of the present invention are described in more detail. Although specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0051] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the implementation of the utility model, but the description is based on the general principles of the specification and is not used to limit the scope of the utility model. The scope of protection of the utility model shall be determined by the definition of the attached claims.
[0052] To facilitate the understanding of the embodiments of the present utility model, further explanation will be given below by taking specific embodiments as examples in conjunction with the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present utility model.
[0053] See also Figure 1 In one embodiment, the utility model discloses a pressure-controlled syringe with a pre-tightened force storage member, the syringe comprising:
[0054] A syringe 2, the front end of which is used as an injection end, and the rear end of which is provided with a syringe tail end surface 5; the injection end is connected to a needle 1;
[0055] Push rod 6, wherein
[0056] The push rod 6 extends into one end of the syringe and is connected to the plunger 3;
[0057] A force storage member 4 is provided between the plunger 3 and the end face 5 of the syringe tail;
[0058] The push rod 6 is provided with at least one clamping mechanism for pre-tightening the force storage member 4. Through the clamping mechanism, the push rod 6 is clamped at the tail end face 5 of the syringe, and the force storage member 4 is pre-tightened so that the plunger 3 applies a pressure of 80-120 mm Hg into the syringe 2.
[0059] It is understood that the syringe can be provided with a needle or without a needle, which has been confirmed by the prior art. There are quite a few syringes without needles in the prior art. Figure 1 As shown, it illustrates the needle 1 connected to the injection end.
[0060] It should be noted that the inventors have found, based on a large number of coronary artery bypass grafting surgeries, that a pressure of 80-120 mm Hg is a suitable range, which is determined by the perfusion pressure that the great saphenous vein or the small saphenous vein, etc., bears as a bridge vessel in the arterial circulation. In addition, the inventors have also found that a pressure lower than 80 mm Hg is not conducive to relieving the spasm of the great saphenous vein or the small saphenous vein, while a pressure higher than 120 mm Hg may cause endothelial cell stripping and smooth muscle stress damage, thereby causing pathological reconstruction of the great saphenous vein or the small saphenous vein, which of course reduces the long-term patency of the bridge vessel. Taking the above factors into consideration, it was finally determined that a pressure of 80-120 mm Hg was the range of the preload pressure of the syringe.
[0061] During bypass surgery, the great saphenous vein or the small saphenous vein, which serves as a bridge vessel, is always in a spasmodic state. The traditional solution is to manually press it. However, the pressure of 700 mm Hg by manual pressing is too high, which will damage the vessel wall of the bridge vessel and cause damage-related pathological reconstruction of the bridge vessel, thereby causing a higher probability of restenosis of the bridge vessel in the future and the time of restenosis to occur earlier. Obviously, the syringe described in the utility model can generate a pressure of 80-120 mm Hg and act on the plunger in the syringe due to the action of the force storage member, and then the injection end is connected to the great saphenous vein or the small saphenous vein, so that this pressure-controlled syringe achieves a safe and controllable pressure and is used for relieving spasms of the great saphenous vein or the small saphenous vein.
[0062] It can be understood that after releasing the preload, the syringe will automatically push the plunger.
[0063] Further, in another embodiment, after the syringe of the utility model has drawn out a certain amount of medicine (e.g., medicine for relieving spasms), it can then, through the action of the force storage member, act on the plunger in the syringe through a pressure of 80-120 mm Hg to push the medicine, and then be used to relieve the spasm of the great saphenous vein or the small saphenous vein. Exemplarily, the medicine composition includes papaverine, which can be used to relieve spasms. At this time, the drug effect is superimposed on the effect of the safe and controllable pressure described in the previous paragraph, and the technical effect of the syringe to relieve spasms will be better. Further, exemplarily, the syringe is implemented as a vacuum, sealed structure pre-loaded with antispasmodic drugs, and the solid solution of the antispasmodic drug is pre-loaded in the syringe in advance, for example, pre-loaded in the syringe space between the plunger and the injection end. For example, each time the syringe is used, 30 mg of papaverine is contained therein. The medicine can be prepared using 20 ml of 0.9% NaCl as a solvent.
[0064] In another embodiment,
[0065] The clamping mechanism is a deformable component, including a pair of symmetrically arranged clamping parts 6a and 6b arranged on the push rod 6, wherein when the push rod 6 is pulled out of the syringe 2, the clamping part 6a and the clamping part 6b act as a pair of clamping parts, unfold and clamp on the plane where the tail end face 5 of the syringe is located.
[0066] In another embodiment,
[0067] The clamping mechanism is a non-deformable component, and includes a groove 62 arranged on the push rod 6, wherein when the push rod 6 is pulled out of the syringe 2, the groove 62 is clamped on the plane where the end surface 5 of the syringe tail is located.
[0068] In another embodiment,
[0069] The number of the symmetrical clamping parts is multiple pairs to realize multiple clamping mechanisms, and the multiple pairs of clamping parts are arranged on the push rod 6 in sequence from the front end to the rear end of the syringe; wherein, when the push rod 6 is pulled out of the syringe 2, the multiple pairs of clamping parts can be unfolded in sequence and clamped on the plane where the tail end face 5 of the syringe is located.
[0070] In another embodiment,
[0071] The number of the grooves is multiple to realize multiple snap-in mechanisms, and the multiple grooves are sequentially arranged on the push rod 6 in the direction from the front end to the rear end of the syringe; wherein, when the push rod 6 is pulled out of the syringe 2, the multiple grooves can be sequentially snap-into the plane where the tail end face 5 of the syringe is located.
[0072] In another embodiment,
[0073] The syringe is disposable.
[0074] In another embodiment,
[0075] The clamping mechanism is disposable.
[0076] In another embodiment,
[0077] The force storage member is a spring.
[0078] In another embodiment,
[0079] The force storage member is an electromagnetic energy storage member, and when the force storage member is an electromagnetic energy storage member, the syringe does not need to be provided with a needle.
[0080] It should be noted that when the force storage member is an electromagnetic energy storage member, the syringe barrel may further include a control unit and a battery. In this way, when powered by a battery, compared with a spring-type force storage member, the control unit can more smoothly control the pressure change of the electromagnetic energy storage member when pushing the plunger, and achieve complete automatic control.
[0081] Although the embodiments of the utility model are described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can also make many forms under the enlightenment of this specification and without departing from the scope of protection of the claims of the utility model, which all belong to the protection of the utility model.
Claims
1. A pressure-controlled injector having a preloaded force storage member, characterized in that: The syringe comprises: A syringe (2), wherein the front end of the syringe is used as an injection end, and the rear end of the syringe is provided with a syringe tail end surface (5); A push rod (6), wherein A push rod (6) extends into one end of the syringe and is connected to a plunger (3); A force storage member (4) is provided between the plunger (3) and the end surface (5) of the syringe tail, and the force storage member (4) is pre-tightened so that the plunger (3) applies a pressure of 80-120 mm Hg to the syringe (2); in, The force storage member is a spring; The push rod (6) is provided with at least one clamping mechanism for pre-tightening the force storage member (4), and the force storage member (4) is pre-tightened by the clamping mechanism so that the plunger (3) applies a pressure of 80-120 mm Hg into the syringe (2); The syringe is used to automatically push the plunger; When the clamping mechanism is a deformable component, it comprises a pair of symmetrically arranged first clamping parts (6a) and second clamping parts (6b) arranged on the push rod (6), wherein when the push rod (6) is pulled out of the syringe (2), the first clamping part (6a) and the second clamping part (6b) act as a pair of clamping parts, unfold and clamp on the plane where the end face (5) of the syringe tail is located; When the locking mechanism is a non-deformable component, it comprises a groove (62) provided on the push rod (6), wherein when the push rod (6) is pulled out of the syringe (2), the groove (62) is locked in the plane where the end surface (5) of the syringe tail is located.
2. The syringe according to claim 1, characterized in that: The number of the symmetrical clamping parts is a plurality of pairs of clamping parts to realize a plurality of clamping mechanisms, and the plurality of pairs of clamping parts are sequentially arranged on the push rod (6) in the direction from the front end of the syringe to the rear end of the syringe; wherein, when the push rod (6) is pulled out of the syringe (2), the plurality of pairs of clamping parts can be sequentially unfolded and clamped to the plane where the end surface (5) of the rear end of the syringe is located.
3. The syringe according to claim 1, characterized in that: The number of the grooves is multiple so as to realize multiple snap-fit mechanisms, and the multiple grooves are sequentially arranged on the push rod (6) in the direction from the front end of the syringe to the rear end of the syringe; wherein, when the push rod (6) is pulled out of the syringe (2), the multiple grooves can be sequentially snap-fitted to the plane where the end face (5) of the rear end of the syringe is located.
4. The syringe according to claim 1, characterized in that: The syringe is disposable.