CN213940746U - Medical painless blood sampling needle - Google Patents
Medical painless blood sampling needle Download PDFInfo
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- CN213940746U CN213940746U CN202021746450.2U CN202021746450U CN213940746U CN 213940746 U CN213940746 U CN 213940746U CN 202021746450 U CN202021746450 U CN 202021746450U CN 213940746 U CN213940746 U CN 213940746U
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Abstract
The utility model discloses a medical painless blood sampling needle that efficiency is higher: the tube body is hermetically and slidably assembled in the needle sheath up and down; the outer diameter of the puncture needle is far smaller than the inner diameter of the tube head, the top and the bottom of the puncture needle are both inclined needle points, and the needle point at the top end of the puncture needle positioned in the needle sheath corresponds to the bottom end of the tube head; at least two radial through holes are arranged on the side wall of the needle sheath near the inner wall of the bottom end; at least two radial matching through holes are arranged on the puncture needle; the connecting piece made of elastic material is a pressure spring with the top end connected with the bottom end of the piston and the bottom end connected with the top end of the sealing piece made of tough elastic material, the sealing piece can hermetically cover the top end of the tube head, and a gap is formed between the periphery of the sealing piece and the inner wall of the negative pressure sampling tube body; the elastic medicine bag is filled with an analgesic which hermetically connects the upper end and the lower end of the needle sheath with the periphery of the needle sheath; the elastic sleeve plug is provided with a longitudinal hole with the top closed by a film layer, the elastic sleeve plug can be sleeved on the puncture needle in an up-and-down sliding manner, and the periphery of the elastic sleeve plug is in sealing and abutting contact with the inner wall of the needle sheath.
Description
Technical Field
The utility model relates to a medical appliance, in particular to a medical painless blood sampling needle.
Background
A common medical blood sampling needle comprises a tube body, a tube head and a puncture needle fixedly connected with the tube head through threads. When the blood sampling needle in the prior art is used for sampling blood, the sampling needle is directly punctured into a human body for sampling blood, so that pain and discomfort are caused. In particular, when arterial blood is sampled, a relatively strong pricking pain is caused in the process of the puncture needle piercing the artery due to a large number of nerve tissues around the artery, which causes a strong pain and discomfort to the person who is to take the blood sample. Some people with sensitive nervous tissues around the artery usually twist their bodies due to the pain caused by strong stabbing pain, especially some children twist their bodies suddenly and violently due to the pain caused by strong stabbing pain, so that the blood collection process is long, the blood collection is difficult, and the efficiency is low.
Meanwhile, such a medical blood sampling needle of the prior art is generally used as such, after a blood sample is collected; firstly, medical staff directly insert a puncture needle into a light blue rubber plug and then send the light blue rubber plug to a laboratory for inspection; before the examination, the examination personnel unscrew the puncture needle from the tube head; and secondly, the puncture needle is directly unscrewed from the tube head by medical staff, the tube head is sealed by a green cover, and then the tube head is sent to a laboratory for inspection. The two using modes have basically the same problem, and the blood sampling process is not closed, so that the sampled blood sample is unqualified; when the puncture needle is taken down from the tube head, the blood is leaked out and does not meet the prevention and control requirements; in the process of transferring, handing over and checking the blood sample, the puncture needle may stab medical staff, and the safety is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a medical painless blood sampling needle, it can be when gathering the blood sample, and the stabbing pain is slight, can not be uncomfortable, and the blood sampling process is shorter, easier, efficiency is higher. Meanwhile, the whole blood sampling process can be closed, so that the qualification of the sampling sample is ensured; when the puncture needle is separated from the tube head, blood does not leak outwards, and the prevention and control requirements are met; particularly, in the process of transferring, handing over and checking the blood sample, the puncture accident of the puncture needle of medical staff can be reduced, and the safety is better.
In order to solve the technical problem, the utility model discloses a medical painless blood sampling needle, including the body, sealed, can assemble the push rod that is connected at the top of piston, lower extreme and piston in the body with sliding from top to bottom to and tube head and pjncture needle, its characterized in that: the negative pressure sampling tube body is communicated with the tube body, the upper end of the negative pressure sampling tube body is connected with the lower end of the tube body, the outer diameter of the negative pressure sampling tube body is smaller than that of the tube body, and the top end of the negative pressure sampling tube body is provided with an open needle sheath, a sealing structure, an elastic medicine bag and an elastic sleeve plug;
the tube body is hermetically and slidably assembled in the needle sheath up and down; the outer diameter of the tube head is smaller than that of the negative pressure sampling tube body and extends downwards from the middle of the lower end of the negative pressure sampling tube body;
the outer diameter of the puncture needle is far smaller than the inner diameter of the tube head, the top end and the bottom end of the puncture needle are both inclined needle points and are fixedly connected to the bottom end of the needle sheath, the upper part of the puncture needle is positioned in the needle sheath, the lower part of the puncture needle is positioned outside the bottom end of the needle sheath, and the needle point at the top end of the puncture needle positioned in the needle sheath corresponds to the bottom end of the tube head;
the needle sheath is made of transparent materials, and at least two radial through holes are formed in the position, close to the inner wall of the bottom end, of the side wall of the needle sheath; the puncture needle is provided with at least two radial matching through holes which are communicated with the longitudinal through hole and are matched with the at least two radial through holes on the needle sheath;
the sealing structure comprises a connecting piece made of elastic material and a sealing piece made of tough elastic material, the connecting piece of the sealing structure is a pressure spring of which the top end is connected with the bottom end of the piston and the bottom end is connected with the top end of the sealing piece, the sealing piece can hermetically cover the top end of the tube head, and a gap is formed between the periphery of the sealing piece and the inner wall of the negative pressure sampling tube body;
the elastic medicine bag is made of transparent elastic materials, an analgesic is filled in the elastic medicine bag, the elastic medicine bag surrounds the lower part of the needle sheath, and the upper end and the lower end of the elastic medicine bag are hermetically connected with the periphery of the needle sheath;
the elastic sleeve plug is provided with a longitudinal hole with the top sealed by a thin film layer, and the elastic sleeve plug is sleeved on the puncture needle in a sealing manner through the longitudinal hole in an up-and-down sliding manner, the periphery of the elastic sleeve plug is in sealing abutting contact with the inner wall of the needle sheath, the bottom end of the elastic sleeve plug is positioned above the radial matching through hole on the puncture needle, the longitudinal height of the elastic sleeve plug is smaller than the height from the top end of at least two radial matching through holes on the puncture needle to the top end needle point of the puncture needle, and is larger than the height from the top end of at least two radial matching through holes on the puncture needle to the bottom end inner wall of the needle sheath.
Preferably, the seal of the seal structure is made of a relatively tough, resilient rubber.
Preferably, the sealing element of the sealing structure is circular, and the diameter of the sealing element is larger than the inner diameter of the tube head and smaller than the inner diameter of the negative pressure sampling tube body.
Preferably, the sealing element of the sealing structure is square, and the side length of the sealing element is larger than the inner diameter of the tube head and smaller than the inner diameter of the negative pressure sampling tube body.
Preferably, the sealing element of the sealing structure is in a regular prism shape, and the diagonal length of the sealing element is greater than the inner diameter of the tube head and less than the inner diameter of the negative pressure sampling tube body.
Preferably, the elastic medicine bag is an arc cavity with the upper end and the lower end cut off.
Preferably, the elastic sachet is made of transparent elastic rubber.
Preferably, the elastic sleeve plug is a convolution body with a large upper end and a small lower end.
Preferably, the elastic sleeve plug is made of elastic rubber.
The utility model has the following advantages;
therefore, in the process of collecting blood samples by artery puncture by using the medical painless blood sampling needle of the utility model, medical staff can gradually increase the grip strength of the elastic medicine bag by holding, so that the elastic medicine bag gradually shrinks and becomes smaller and the analgesic medicament contained in the elastic medicine bag gradually enters the needle sheath from the radial through hole on the needle sheath, then enters the longitudinal through hole of the puncture needle from the radial matching through hole on the puncture needle, and enters the artery blood vessel of human body from the bottom needle point of the puncture needle, thus rapidly easing pain; when the needle point at the bottom end of the puncture needle enters a blood vessel, medical staff can enable the elastic medicine bag to gradually rebound and generate negative pressure by means of own elasticity through gradually reducing the grip force of the elastic medicine bag, and the negative pressure can enable blood mixed with analgesic to flow into the elastic medicine bag through the longitudinal through hole and the radial matching through hole on the puncture needle and the radial through hole on the needle sheath. At the moment, the tube body is pushed downwards, so that the bottom end of the tube head is pressed on the top end of the elastic sleeve plug and pushes the elastic sleeve plug to slide downwards on the puncture needle until the bottom end of the elastic sleeve plug seals the radial matching through hole on the puncture needle. Meanwhile, the tip of the puncture needle punctures the thin film layer on the top of the longitudinal hole on the elastic sleeve plug, enters the tube head, pushes the sealing element made of tough elastic material upwards to leave the top of the tube head, then enters the negative pressure sampling tube body, and then the medical staff pulls the piston upwards through the push rod and the like to collect blood samples. Then, the puncture needle is withdrawn from the negative pressure sampling tube body and the tube head in sequence, and the top end of the tube head is sealed by the sealing piece under the pressure of the pressure spring. Then, taking the tube body, the negative pressure sampling tube body and the tube head which are integrally connected from top to bottom out of the needle sheath, and then carrying out the links of transferring, handing over and checking the blood sample; in the former process, the puncture needle is always fixed on the bottom end of the needle sheath, i.e. the puncture needle and the needle sheath do not enter the former process, and the sealing element seals the top end of the tube head. Until the blood sample is tested, the medical staff pulls the piston and the pressure spring upwards through the push rod and the like, and the pressure spring drives the sealing piece to leave the top end of the tube head, so that the blood sample is poured out from the bottom end of the tube head for testing.
It is thus clear that the medical painless blood sampling needle of the utility model is used to make analgesic enter into the artery of human body to rapidly relieve pain in the process of collecting blood sample by artery puncture. When a subsequent blood sample is collected, the pricking pain is slight, the patient is not uncomfortable, the patient with sensitive nervous tissue around the artery or the infant does not have the pain of strong pricking pain, and the body of the patient is not suddenly and severely twisted due to the strong pricking pain, so that the blood sampling process is short, easy and high in efficiency. Meanwhile, in the links of transferring, handing over and checking the blood sample, the tube head and the puncture needle are separated and sealed by a sealing piece. Therefore, the whole blood sampling process is closed, and the qualification of the sampling sample is ensured; when the puncture needle is separated from the tube head, blood does not leak outwards, and the prevention and control requirements are met; especially, in the process of transferring, handing over and checking the blood sample, the occurrence of the accident that medical staff are injured by puncture needles is reduced, and the safety is better.
Drawings
Fig. 1 is a schematic structural view of the painless blood sampling needle of the present invention.
Detailed Description
The following describes in detail preferred embodiments of the present invention with reference to the accompanying drawings.
It is to be understood that in the description of the present invention, the terms "upper", "lower", "middle", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the components referred to must have specific orientations and be constructed and operated in specific orientations. Meanwhile, "at least two" means two or more. And therefore should not be construed as limiting the invention.
Referring to fig. 1, the medical painless blood sampling needle of the present invention comprises a tube body 20, a piston 21 hermetically assembled in the tube body 20 in a manner of sliding up and down, a push rod 22 with a lower end connected to the top of the piston 21, a tube head 23 and a puncture needle 30, as shown in fig. 1, the present invention further comprises a negative pressure sampling tube body 24 which is communicated with the tube body 20, has an upper end connected to the lower end of the tube body 20, and has an outer diameter smaller than the outer diameter of the tube body 20, and a needle sheath 10 with an opening at the top end, a sealing structure, an elastic drug capsule 50 and an elastic sleeve plug 60; the tube body 20 is hermetically and slidably assembled in the needle sheath 10 up and down; the outer diameter of the tube head 23 is smaller than that of the negative pressure sampling tube body 24 and extends downwards from the middle part of the lower end of the negative pressure sampling tube body 24; the outer diameter of the puncture needle 30 is far smaller than the inner diameter of the tube head 23, the top and the bottom ends of the puncture needle are both inclined needle points and are fixedly connected to the bottom end of the needle sheath 10, the upper part of the puncture needle is positioned in the needle sheath 10, the lower part of the puncture needle is positioned outside the bottom end of the needle sheath 10, and the needle point at the top end of the puncture needle positioned in the needle sheath 10 corresponds to the bottom end of the tube head 23; the needle sheath 10 is made of transparent materials, and at least two radial through holes 11 are formed in the side wall of the needle sheath, close to the inner wall of the bottom end of the needle sheath; the puncture needle 30 is provided with at least two radial matching through holes 31 which are communicated with the longitudinal through hole and matched with the at least two radial through holes 11 on the needle sheath 10; the sealing structure comprises a connecting piece 41 and a sealing piece 42 which are both made of elastic materials, the connecting piece 41 of the sealing structure 40 is a pressure spring of which the top end is connected with the bottom end of the piston 21 and the bottom end is connected with the top end of the sealing piece 42, the sealing piece 42 can hermetically cover the top end of the tube head 23, and a gap is formed between the periphery of the sealing piece 42 and the inner wall of the negative pressure sampling tube body 24; the elastic medicine bag 50 is made of transparent elastic material, contains an analgesic, surrounds the lower part of the needle sheath 10, and is hermetically connected with the periphery of the needle sheath 10 at the upper end and the lower end; the elastic sleeve plug 60 is provided with a longitudinal hole 61 with the top closed by a film layer, and is sleeved on the puncture needle 30 in a sealing and up-and-down sliding manner through the longitudinal hole 61, the periphery of the longitudinal hole is in sealing and abutting contact with the inner wall of the needle sheath 10, the bottom end of the longitudinal hole is positioned above the radial matching through hole 31 on the puncture needle 30, the longitudinal height of the longitudinal hole is smaller than the height from the top end of at least two radial matching through holes 31 on the puncture needle 30 to the top end needle point of the puncture needle 30, and is larger than the height from the top end of at least two radial matching through holes 31 on the puncture needle 30 to the bottom end inner wall of the needle sheath 10.
Therefore, in the process of collecting blood samples by artery puncture with the medical painless blood sampling needle of the utility model, medical staff can gradually increase the holding power of the elastic medicine bag 50 by holding, and gradually shrink the elastic medicine bag 50 to reduce and gradually enter the analgesic drug contained in the elastic medicine bag into the needle sheath 10 from the radial through hole 11 on the needle sheath 10, then enter the longitudinal through hole of the puncture needle 30 from the radial matching through hole 31 on the puncture needle 30, and enter the artery blood vessel of the human body from the bottom end of the puncture needle 30 to rapidly relieve pain; when the bottom end needle tip of the puncture needle 30 enters a blood vessel, the medical staff can make the elastic medicine bag 30 gradually rebound and generate negative pressure by the self elasticity of the elastic medicine bag 30 through gradually reducing the holding power of the elastic medicine bag 30, and the negative pressure can make the blood mixed with the analgesic agent flow into the elastic medicine bag 30 through the longitudinal through hole and the radial matching through hole 31 on the puncture needle 30 and the radial through hole 11 on the needle sheath 10. At this time, the tube body 20 is pushed downwards, so that the bottom end of the tube head 23 presses on the top end of the elastic sleeve plug 60 and pushes the elastic sleeve plug 60 to slide downwards on the puncture needle 30 until the bottom end of the elastic sleeve plug 60 seals the radial matching through hole 31 on the puncture needle 30. At the same time, the tip of the puncture needle 30 pierces the membrane layer at the top of the longitudinal hole 61 in the elastic sleeve plug 60, enters the tube head 23 and pushes the sealing member 42 made of a tough elastic material upward away from the top end of the tube head 23, and then enters the negative pressure sampling tube 24, so that the medical staff pulls the piston 21 upward through the push rod 22 and the like to collect a blood sample. Thereafter, the puncture needle 30 is sequentially withdrawn from the negative pressure sampling tube 24 and the cartridge 23, and the seal member 42 seals the tip of the cartridge 23 under the pressure of the compression spring. Then, taking the tube body 20, the negative pressure sampling tube body 24 and the tube head 23 which are integrally connected from top to bottom out of the needle sheath 10, and then carrying out the links of transferring, handing over and checking the blood sample; in the former case, the needle 30 is always fixed to the bottom end of the sheath 10, i.e., the needle 30 and the sheath 10 do not enter the former case, and the seal 42 seals the top end of the ferrule 23. Until the blood sample is tested, the medical staff pulls the piston 21 and the pressure spring upward through the push rod 22 and the like, and the pressure spring drives the sealing member 42 away from the top end of the tube head 23, so that the blood sample is poured out from the bottom end of the tube head 23 for testing.
It is thus clear that the medical painless blood sampling needle of the utility model is used to make analgesic enter into the artery of human body to rapidly relieve pain in the process of collecting blood sample by artery puncture. When a subsequent blood sample is collected, the pricking pain is slight, the patient is not uncomfortable, the patient with sensitive nervous tissue around the artery or the infant does not have the pain of strong pricking pain, and the body of the patient is not suddenly and severely twisted due to the strong pricking pain, so that the blood sampling process is short, easy and high in efficiency. Meanwhile, the tip 23 is separated from the needle 30 and sealed by the sealing member 42 during the transportation, delivery and examination of the blood sample. Therefore, the whole blood sampling process is closed, and the qualification of the blood sample is ensured; when the puncture needle 30 is separated from the tube head 23, the blood does not leak, and the prevention and control requirements are met; especially, in the process of transferring, handing over and checking the blood sample, the occurrence of the accident that medical staff are injured by puncture needles is reduced, and the safety is better.
The seal 42 of the seal structure is preferably made of a relatively tough, resilient rubber. This allows the resilience of the seal 42 to seal the tip of the cartridge 23 well, yet be tough and secure against puncture when pushed off the tip of the cartridge 23 by the tip of the puncture needle 30. Therefore, the use effect is good.
The seal 42 of the seal is preferably circular in shape and has a diameter greater than the inside diameter of the tip and less than the inside diameter of the negative pressure sampling tube body 24. This allows the seal 42 to be relatively simple in construction, relatively easy to manufacture and relatively inexpensive.
The sealing member 42 of the sealing structure may also preferably be square, with a side length greater than the inner diameter of the tip 23 and less than the inner diameter of the negative pressure sampling tube 24. This also makes the seal 42 simpler in construction, easier to manufacture and less costly.
The sealing member 42 of the sealing structure may also preferably be a regular prism having a diagonal length greater than the inner diameter of the tip 23 and less than the inner diameter of the negative pressure sampling tube body 24. This also makes the seal 42 simpler in construction, easier to manufacture and less costly.
The elastic medicine bag 50 is preferably a circular arc cavity with the upper and lower ends cut off. This allows the elastomeric sachet 50 to be conveniently held and applied with a gripping force during use.
The elastomeric sachet 50 is made of a preferably transparent elastomeric rubber skin. This results in a more elastic elastomeric sachet 50 with better use.
The elastic sleeve plug 60 is preferably a convolution body with a large upper end and a small lower end, and may be a cone, for example. This makes the structure of the elastic sleeve stopper 60 relatively simple and the pushing force applied when pushing downward is relatively small and labor-saving.
The elastic sleeve stopper 60 is preferably made of elastic rubber. This makes the elastic sleeve plug 60 have better elasticity and better use effect.
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. The utility model provides a medical painless blood sampling needle, includes the body, and the piston of assembly in the body sealedly, can slide from top to bottom, the push rod that the lower extreme is connected with the top of piston to and tube head and pjncture needle, its characterized in that: the negative pressure sampling tube body is communicated with the tube body, the upper end of the negative pressure sampling tube body is connected with the lower end of the tube body, the outer diameter of the negative pressure sampling tube body is smaller than that of the tube body, and the top end of the negative pressure sampling tube body is provided with an open needle sheath, a sealing structure, an elastic medicine bag and an elastic sleeve plug;
the tube body is hermetically and slidably assembled in the needle sheath up and down; the outer diameter of the tube head is smaller than that of the negative pressure sampling tube body and extends downwards from the middle of the lower end of the negative pressure sampling tube body;
the outer diameter of the puncture needle is far smaller than the inner diameter of the tube head, the top end and the bottom end of the puncture needle are both inclined needle points and are fixedly connected to the bottom end of the needle sheath, the upper part of the puncture needle is positioned in the needle sheath, the lower part of the puncture needle is positioned outside the bottom end of the needle sheath, and the needle point at the top end of the puncture needle positioned in the needle sheath corresponds to the bottom end of the tube head;
the needle sheath is made of transparent materials, and at least two radial through holes are formed in the position, close to the inner wall of the bottom end, of the side wall of the needle sheath; the puncture needle is provided with at least two radial matching through holes which are communicated with the longitudinal through hole and are matched with the at least two radial through holes on the needle sheath;
the sealing structure comprises a connecting piece made of elastic material and a sealing piece made of tough elastic material, the connecting piece of the sealing structure is a pressure spring of which the top end is connected with the bottom end of the piston and the bottom end is connected with the top end of the sealing piece, the sealing piece can hermetically cover the top end of the tube head, and a gap is formed between the periphery of the sealing piece and the inner wall of the negative pressure sampling tube body;
the elastic medicine bag is made of transparent elastic materials, an analgesic is filled in the elastic medicine bag, the elastic medicine bag surrounds the lower part of the needle sheath, and the upper end and the lower end of the elastic medicine bag are hermetically connected with the periphery of the needle sheath;
the elastic sleeve plug is provided with a longitudinal hole with the top sealed by a thin film layer, and the elastic sleeve plug is sleeved on the puncture needle in a sealing manner through the longitudinal hole in an up-and-down sliding manner, the periphery of the elastic sleeve plug is in sealing abutting contact with the inner wall of the needle sheath, the bottom end of the elastic sleeve plug is positioned above the radial matching through hole on the puncture needle, the longitudinal height of the elastic sleeve plug is smaller than the height from the top end of at least two radial matching through holes on the puncture needle to the top end needle point of the puncture needle, and is larger than the height from the top end of at least two radial matching through holes on the puncture needle to the bottom end inner wall of the needle sheath.
2. The medical painless blood sampling needle of claim 1, wherein: the seal of the seal structure is made of a relatively tough, resilient rubber.
3. The medical painless blood sampling needle of claim 2, wherein: the sealing piece of the sealing structure is circular, and the diameter of the sealing piece is larger than the inner diameter of the tube head and smaller than the inner diameter of the negative pressure sampling tube body.
4. The medical painless blood sampling needle of claim 2, wherein: the sealing piece of the sealing structure is square, and the side length of the sealing piece is larger than the inner diameter of the tube head and smaller than the inner diameter of the negative pressure sampling tube body.
5. The medical painless blood sampling needle of claim 2, wherein: the sealing element of the sealing structure is in a regular prism shape, and the length of a diagonal line of the sealing element is larger than the inner diameter of the tube head and smaller than the inner diameter of the negative pressure sampling tube body.
6. The medical painless blood sampling needle of any of claims 1 to 5, wherein: the elastic medicine bag is an arc cavity with the upper end and the lower end cut off.
7. The medical painless blood sampling needle of claim 6, wherein: the elastic medicine bag is made of transparent elastic rubber.
8. The medical painless blood sampling needle of claim 7, wherein: the elastic sleeve plug is a convolution body with a large upper end and a small lower end.
9. The medical painless blood sampling needle of claim 8, wherein: the elastic sleeve plug is made of elastic rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021746450.2U CN213940746U (en) | 2020-08-20 | 2020-08-20 | Medical painless blood sampling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021746450.2U CN213940746U (en) | 2020-08-20 | 2020-08-20 | Medical painless blood sampling needle |
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| Publication Number | Publication Date |
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| CN213940746U true CN213940746U (en) | 2021-08-13 |
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| CN202021746450.2U Active CN213940746U (en) | 2020-08-20 | 2020-08-20 | Medical painless blood sampling needle |
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| CN (1) | CN213940746U (en) |
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