Mixed injection device for laparoscopic surgery

Abstract

The mixed injection device comprises a handheld body and a detachable needle head assembly, the handheld body comprises a holding rod and a pushing rod, the pushing rod is located in a containing cavity of the holding rod, the pushing rod is connected with a power assembly, and the power assembly is connected with the handheld body. The pushing rod is driven by the power assembly to move along the axis of the containing cavity; the detachable needle head assembly comprises an injection cavity, a pushing and injecting plug and an injection head, and the pushing and injecting plug drives a medicament in the storage cavity to flow to the injection head through the injection outlet; the device can be used in the laparoscopic surgery process, the two independent storage cavities are formed in the position of the injection cavity, the mixed injection process of multiphase medicine can be achieved, the multiphase medicine can be mixed and accurately injected to the position, required by the surgery, in the abdominal cavity, the injection efficiency in the laparoscopic surgery process is improved, and the pain of a patient is relieved; and the mixed injection device adopts a detachable structure, so that the cost is lower, the disinfection and maintenance are easy, and the popularization and application of the product are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of laparoscopic surgical instruments, in particular to a mixed injection device used for laparoscopic surgery. Background Art

[0002] Laparoscopic surgery refers to a surgery performed by making several small incisions with a diameter of 5 to 12 mm in different parts of the abdomen, through which a laparoscope and various special surgical instruments are inserted into the abdomen. In laparoscopic surgery, it is usually necessary to inject some special drugs into the patient's abdominal cavity, such as anesthetics, hemostatics, and anti-adhesion drugs. In particular, when injecting multi-phase mixed drugs, at least two or more independent injection cavities are required. At present, the traditional method for the intraperitoneal injection process is to use a plastic tube inserted into the abdominal cavity through a laparoscope for injection. This method is not only inconvenient to operate, but also difficult to maintain, maintain and disinfect. At the same time, it is also impossible to achieve mixed injection of multi-phase drugs. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a mixed injection device for laparoscopic surgery, which specifically adopts the following technical solutions:

[0004] A mixing injection device for laparoscopic surgery comprises a handheld body and a detachable needle assembly.

[0005] The handheld body comprises a holding rod and a pushing rod, one end of the holding rod is provided with a first threaded portion, the other end is provided with a power assembly, and a receiving cavity with two ends passing through is provided in the holding rod; the pushing rod is located in the receiving cavity of the holding rod, and the pushing rod is connected to the power assembly, and the pushing rod is driven by the power assembly to move along the axis of the receiving cavity;

[0006] The detachable needle assembly comprises an injection cavity, a push plug and an injection head, wherein the injection cavity is provided with at least two storage cavities for accommodating medicines, and an injection outlet is provided at one end of the injection cavity, wherein the injection outlets are respectively communicated with the storage cavities of the injection cavity, and the injection outlets are connected to the injection head;

[0007] Each of the storage cavities is connected to a push plug, and the push plug drives the medicine in the storage cavity to flow to the injection head through the injection outlet;

[0008] The other end of the injection cavity is provided with an opening, and the inner wall of the opening is provided with a second threaded portion, and the second threaded portion is connected to the first threaded portion of the retaining rod.

[0009] Optionally: the injection head includes a needle plug and a thin strip-shaped needle tube fixed on the needle plug, and the needle plug is threadedly connected to the injection outlet of the injection cavity.

[0010] Optionally: the injection head includes a needle bolt and a nozzle fixed on the needle bolt, and the needle bolt is threadedly connected to the injection outlet of the injection cavity.

[0011] Optionally: an integrated connecting plate is provided at one end of the push plug, and the diameter of the connecting plate is smaller than the diameter of the accommodating cavity of the retaining rod.

[0012] Optionally: when the handheld body and the detachable needle assembly are installed in place, the distance between the bottom of the storage cavity and the end of the first threaded portion of the retaining rod is less than the maximum length of the injection plug.

[0013] Optionally: a push plate is provided at one end of the push rod, and the push plate abuts against a connecting plate of the push plug.

[0014] Optionally: the push rod is provided with a rack structure along the length direction, and the rack structure is used to engage with the power component.

[0015] Optionally: the power assembly includes a driving motor and a driving gear located at the end of the driving shaft of the driving motor, the driving gear is engaged with the rack structure of the push rod, and the driving motor drives the driving gear to rotate, thereby driving the push rod to move along the axis of the accommodating cavity.

[0016] Optionally: a partition is provided between adjacent storage cavities in the injection cavity, one end of the partition extends to the bottom of the injection cavity, and the other end of the partition is lower than the second threaded portion.

[0017] Optionally: a pointed end is provided at the bottom of each storage cavity, and a groove is provided on the end surface of the sealing rubber plug of the corresponding push plug.

[0018] Beneficial Effects

[0019] The technical solution of the utility model has the following beneficial effects:

[0020] The mixing injection device of the utility model can be used in laparoscopic surgery. Two independent storage cavities are arranged at the injection cavity position of the detachable needle assembly, which can realize the mixing injection process of multi-phase drugs, realize the mixing of multi-phase drugs and accurately inject them into the required surgical site in the abdominal cavity, improve the injection efficiency of laparoscopic surgery, and reduce the pain of patients. In addition, the mixing injection device is detachable, with low cost, easy disinfection and maintenance, which is conducive to the promotion and application of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a mixing injection device used for laparoscopic surgery in Example 1 of the utility model.

[0022] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the mixing injection device in Example 1 of the utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the detachable needle assembly in Example 1 of the utility model.

[0024] Figure 4 It is a schematic internal cross-sectional view of the detachable needle assembly in Example 1 of the utility model.

[0025] Figure 5 This is a schematic diagram of the interior cross-section of a storage cavity with a pointed tip at the bottom in Example 1 of the utility model.

[0026] Figure 6 This is a schematic diagram of the structure of a detachable needle assembly using a nozzle structure in Example 2 of the utility model.

[0027] The specific meanings of the reference numerals in the accompanying drawings are:

[0028] 1- detachable needle assembly; 101- injection chamber; 102- push plug; 103- connecting plate; 104- sealing rubber plug; 105- storage chamber; 106- partition; 107- injection outlet; 108- injection head; 109- tip; 110- groove; 2- handheld body; 201- holding rod; 202- accommodating chamber; 203- pushing rod; 204- rack structure; 205- pushing plate; 3- power assembly. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model. It should be pointed out that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present application.

[0030] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Embodiment 1:

[0034] Combination Figure 1 Shown and Figure 2 As shown, this embodiment 1 discloses a mixing injection device for laparoscopic surgery, which includes a handheld body 2 and a detachable needle assembly 1.

[0035] Specifically, Figure 2 As shown, the handheld body 2 in this embodiment 1 includes a holding rod 201 and a pushing rod 203, one end of the holding rod 201 is provided with a first threaded portion, and the other end is provided with a power assembly 3, and the holding rod 201 is provided with a receiving cavity 202 with two ends passing through; the pushing rod 203 is located in the receiving cavity 202 of the holding rod 201, and the pushing rod 203 is connected to the power assembly 3, and the pushing rod 203 is driven by the power assembly 3 to move along the axis of the receiving cavity 202. Preferably, the power assembly 3 in this embodiment 1 includes a driving motor and a driving gear located at the end of the driving shaft of the driving motor, and the driving gear is meshed with the rack structure 204 of the pushing rod 203, and the driving motor drives the driving gear to rotate, thereby driving the pushing rod 203 to move along the axis of the receiving cavity 202. Further, in order to mesh the driving gear and realize stable power transmission, the pushing rod 203 in this embodiment 1 is provided with a rack structure 204 along the length direction, and the rack structure 204 is used to mesh the power assembly 3.

[0036] like Figure 3 and Figure 4As shown, the detachable needle assembly 1 includes an injection chamber 101, a push plug 102 and an injection head 108. The injection chamber 101 is provided with at least two storage chambers 105 for containing medicines. An injection outlet 107 is provided at one end of the injection chamber 101. The injection outlets 107 are respectively communicated with the storage chambers 105 of the injection chamber 101, and the injection outlet 107 is connected to the injection head 108. The injection head 108 in this embodiment 1 includes a pintle and a thin strip needle tube fixed on the pintle, wherein the pintle is connected to the injection outlet 107 of the injection chamber 101 by threading. It should be understood that the mixed injection device in this embodiment 1 is mainly used in laparoscopic surgery. In order to prevent the injection head 108 from falling off during the surgery, the pintle of the injection head 108 is threadedly connected to the injection outlet 107 of the injection chamber 101. When the injection head 108 needs to be removed, the injection head 108 can be removed by screwing it. It should be further explained that the injection head 108 in the present embodiment 1 adopts a thin strip-shaped needle tube, which can be used for puncture injection during the operation. Injection heads 108 of different specifications can be selected for replacement according to the specific circumstances of the operation.

[0037] Furthermore, in the injection cavity 101 of the present embodiment 1, at least two storage cavities 105 for accommodating medicines are provided in the injection cavity 101, and each storage cavity 105 is connected to a push plug 102, and a sealing rubber plug 104 is provided at the end of the push plug 102, and the medicine in the storage cavity 105 is driven by the push plug 102 to flow to the needle through the injection outlet 107; in the present embodiment 1, the injection cavity 101 as a whole preferably adopts a cylindrical structure with a diameter of 10 mm, and a partition 106 is provided between adjacent storage cavities 105 in the injection cavity 101, and one end of the partition 106 extends to the bottom of the injection cavity 101, and the injection cavity 101 can be divided into two independent storage cavities 105 by the partition 106, and different medicines are pre-set in the two storage cavities 105, respectively. When injection is performed, the push plug 102 is pushed forward, and the medicines in the two storage cavities 105 will flow to the injection outlet 107 and mix, and then be injected into the surgical site of the patient through the injection head 108.

[0038] It should be noted that in order to reduce the cost of surgical instruments and ensure the safety of the operation. In the mixed injection device of this embodiment 1, since the detachable needle assembly 1 needs to go deep into the abdominal cavity, the detachable needle assembly 1 adopts a disposable instrument, and the handheld body 2 adopts repeated disinfection. During laparoscopic surgery, the detachable needle assembly 1 can be pre-placed with a medicine. It should be understood that the medicine can preferably be a liquid preparation or a powder. For example, in this embodiment 1, since the detachable needle assembly 1 is a disposable instrument, different liquid medicines can be filled into the storage cavity 105 separately in a sterile environment during the manufacturing stage of the detachable needle assembly 1. This method can avoid the exposure of the medicine to the air environment to ensure that the equipment and the medicine are sterile. In addition, for the detachable needle assembly 1 filled with powder, since the push plug 102 and the injection chamber 101 can be detached and separated, the solvent can be injected into the storage chamber 105 in the sterile room before the operation, and when the solvent and the powder are evenly mixed, the push plug 102 can be refilled into the injection chamber 101; or the push plug 102 can be pulled outward so that the solvent is sucked into the storage chamber 105 through the injection outlet 107 located in the injection chamber 101, thereby mixing the solvent and the powder.

[0039] It should be noted that in this embodiment, an opening is provided at the other end of the injection cavity 101, and the inner wall of the opening is provided with a second threaded portion, and the second threaded portion is connected to the first threaded portion of the retaining rod 201. It should be emphasized that in this embodiment, the other end of the partition 106 is lower than the second threaded portion. It should be understood that, in the depth direction of the injection cavity 101, the other end of the partition 106 needs to be lower than the lowest position of the second threaded portion. When the detachable needle assembly 1 and the handheld body 2 are installed in place, the end of the retaining rod 201 will just abut the end of the partition 106 to avoid the partition interfering with the retaining rod.

[0040] It should be understood that in this embodiment 1, two storage chambers 105 are provided, and two push plugs 102 are provided in the corresponding injection chamber 101. In order to ensure that the push plugs 102 in the two storage chambers 105 move synchronously, one end of the two push plugs 102 is provided with an integrated connecting plate 103, and the diameter of the connecting plate 103 is smaller than the diameter of the accommodating chamber 202 of the retaining rod 201. When the detachable needle assembly 1 is installed on the handheld body 2, the connecting plate 103 will be placed in the accommodating chamber 202 of the retaining rod 201. In this embodiment 1, a push plate 205 is provided at one end of the push rod 203, and the push plate 205 can abut against the connecting plate 103 of the push plug 102. When the push rod 203 is pushed forward (i.e., the injection process), the push plate 205 located at the end of the push rod 203 will synchronously push the connecting plate 103, and then the two push plugs 102 integrally connected with the connecting plate 103 will move forward synchronously to realize the liquid pushing process.

[0041] Furthermore, in this embodiment 1, when the handheld body 2 and the detachable needle assembly 1 are installed in place, the distance between the bottom of the storage cavity 105 and the end of the first threaded portion of the retaining rod 201 will be less than the maximum length of the push plug 102. By limiting the length of the push plug 102, it can be ensured that the connecting plate 103 at the end of the push plug 102 is always in the accommodating cavity 202 of the retaining rod 201 within the push stroke.

[0042] As a further improved structure, Figure 5 As shown, in this embodiment 1, a tip 109 may be provided at the bottom of each of the storage cavities, and the medicine in the storage cavities may be placed in a strip medicine bag with a film structure. When injection is required, the strip medicine bags containing different medicines only need to be respectively loaded into the storage cavities (the push plug can be removed when loading), and then the push plug is inserted into the storage cavity. When injection is required during surgery, the strip medicine bag will be squeezed to the bottom of the storage cavity by pushing the push plug forward. At this time, the tip 109 penetrates into the strip medicine bag, and the medicine flows out to the injection outlet through the flow channel of the tip 109. In addition, in order to ensure that all medicines in the strip medicine bag are discharged, in this embodiment 1, a groove 110 is provided on the end face of the sealing rubber plug of the push plug. When the push plug is pushed into place, the tip 109 at the bottom of the storage cavity fits exactly with the groove 110 of the sealing rubber plug.

[0043] The above-mentioned mixed injection device can accurately inject drugs into the required surgical site in the abdominal cavity during laparoscopic surgery, greatly improving the efficiency of laparoscopic surgery and reducing the pain of patients. At the same time, the detachable needle assembly 1 has the characteristics of convenient replacement, which can realize the repeated use of the mixed injection device and ensure the cleanliness and sterility of the instrument.

[0044] Embodiment 2:

[0045] In addition, this embodiment 2 discloses a mixing injection device for laparoscopic surgery, which includes a handheld body 2 and a detachable needle assembly 1. Figure 6 As shown, the basic structure of the device in this embodiment 2 is consistent with that in embodiment 1, except that the injection head 108 of the detachable needle assembly 1 in this embodiment 2 includes a needle plug and a nozzle fixed on the needle plug, and the needle plug is threadedly connected to the injection outlet 107 of the injection chamber 101.

[0046] The mixing injection device using the nozzle structure can achieve uniform spraying of drugs during laparoscopic surgery, and can realize functions such as disinfection and spraying operations, thereby greatly improving the efficiency of laparoscopic surgery and alleviating the pain of patients.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A mixing injection device for laparoscopic surgery, comprising a handheld body and a detachable needle assembly, characterized in that: The handheld body comprises a holding rod and a pushing rod, one end of the holding rod is provided with a first threaded portion, the other end is provided with a power assembly, and a receiving cavity with two ends passing through is provided in the holding rod; the pushing rod is located in the receiving cavity of the holding rod, and the pushing rod is connected to the power assembly, and the pushing rod is driven by the power assembly to move along the axis of the receiving cavity; The detachable needle assembly comprises an injection cavity, a push plug and an injection head, wherein the injection cavity is provided with at least two storage cavities for accommodating medicines, and an injection outlet is provided at one end of the injection cavity, wherein the injection outlets are respectively communicated with the storage cavities of the injection cavity, and the injection outlets are connected to the injection head; Each of the storage cavities is connected to a push plug, and the push plug drives the medicine in the storage cavity to flow to the injection head through the injection outlet; The other end of the injection cavity is provided with an opening, and the inner wall of the opening is provided with a second threaded portion, and the second threaded portion is connected to the first threaded portion of the retaining rod.

2. The mixing injection device according to claim 1, characterized in that: The injection head comprises a needle plug and a thin strip needle tube fixed on the needle plug, and the needle plug is connected to the injection outlet of the injection cavity by threaded connection.

3. The mixing injection device according to claim 1, characterized in that: The injection head comprises a needle bolt and a nozzle fixed on the needle bolt, and the needle bolt is connected to the injection outlet of the injection cavity by threaded connection.

4. The mixing injection device according to claim 1, characterized in that: An integrated connecting plate is provided at one end of the push plug, and the diameter of the connecting plate is smaller than the diameter of the accommodating cavity of the retaining rod.

5. The mixing injection device according to claim 1, characterized in that: When the handheld body and the detachable needle assembly are installed in place, the distance between the bottom of the storage cavity and the end of the first threaded portion of the retaining rod is less than the maximum length of the push plug.

6. The mixing injection device according to claim 4, characterized in that: A push plate is provided at one end of the push rod, and the push plate abuts against the connecting plate of the push plug.

7. The mixing injection device according to claim 1, characterized in that: The push rod is provided with a rack structure along the length direction, and the rack structure is used to engage with the power component.

8. The mixing injection device according to claim 7, characterized in that: The power assembly includes a driving motor and a driving gear located at the end of the driving shaft of the driving motor. The driving gear is meshed with the rack structure of the push rod. The driving motor drives the driving gear to rotate, thereby driving the push rod to move along the axis of the accommodating cavity.

9. The mixing injection device according to claim 1, characterized in that: A partition is provided between adjacent storage cavities in the injection cavity, one end of the partition extends to the bottom of the injection cavity, and the other end of the partition is lower than the second threaded portion.

10. The mixing injection device according to claim 1, characterized in that: A pointed tip is provided at the bottom of each storage cavity, and a groove is provided on the end surface of the sealing rubber plug of the corresponding push plug.

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