CN202801754U - Central vein puncture needle - Google Patents

Abstract

The utility model relates to a central venous puncture needle. One end of a needle tube is arranged on a needle seat, and the other end is a needle point; the needle point is arranged in a conical shape; the inner hole of the needle tube communicates with the inner hole of the needle seat; The side hole is set at the end of the needle tube away from the needle hub; the indicator point is set on the needle hub; the indicator point and the center of the side hole are on a straight line; the outer diameter of the needle tube is 0.7-1mm; When the utility model is used for central vein puncture, only one successful puncture is required; the needle seat is provided with an indicator point that is consistent with the direction of the needle tip side hole, and the needle tip side hole can be fixed near the needle point during the guide wire insertion process. The direction of the heart end ensures that the guide wire is inserted into the target vein in the direction of the proximal end; both the needle tube and the needle tube of the dilation tube are marked with scales, and when the dilation tube is used to expand the puncture path, the depth of the dilation tube can be accurately grasped, so that The puncture path is fully expanded, and the central venous catheter can be placed more smoothly; it can avoid the increased damage to the patient caused by repeated puncture, and reduce the incidence of complications.

Description

central venous needle

technical field

The utility model relates to a central venous puncture needle, in particular to an improved central venous puncture needle which can be successfully inserted into a central venous catheter only after one successful puncture, and has few puncture complications and a high success rate, and belongs to the technical field of medical instruments .

Background technique

At present, the commonly used methods of central venous puncture with central venous puncture equipment (the right internal jugular vein puncture from the posterior approach as an example): 1) The patient is placed in supine position with the head tilted to the left, the puncture site is routinely disinfected, and a drape is laid; 2) ) Select the posterior edge of the clavicular head of the sternocleidomastoid muscle and the two transverse fingers above the clavicle as the puncture point, and perform local anesthesia; 3) Use a 5ml syringe to connect a No. 4) The syringe draws back dark red blood and is unobstructed. Make sure that the puncture needle is in the internal jugular vein, withdraw or fix the No. 7 needle and remove the syringe at the same time, and connect the 18G steel needle with a 5ml blue needle syringe along the No. 7 needle. Puncture in the direction of the needle, draw dark red blood back and unobstructed, confirm that the puncture needle is in the internal jugular vein, insert a guide wire 250 mm through the tail of the blue syringe; 5) fix the guide wire, withdraw the 18G steel needle, and insert the dilation Tube dilation of the puncture point from the skin to the blood vessel—the puncture route; 6) Fix the guide wire, exit the dilation tube, and insert a 120mm central venous catheter through the guide wire; 7) Fix the catheter, cover the puncture site with medical dressings and films, and connect the catheter to the infusion thong for infusion .

As mentioned above, use the central venous puncture instrument commonly used in clinical practice for central venous puncture, first use a 5ml syringe connected to the No. Needle or fix the No. 7 needle and remove the syringe at the same time. Only when the 5ml blue needle syringe is connected to the 18G steel needle to puncture along the direction of the No. 7 needle, the dark red blood is drawn back and unobstructed, and the puncture needle is marked in the internal jugular vein. The puncture was successful (secondary success). Due to: a) vasospasm will occur due to the damage and stimulation of blood vessels caused by the puncture of the No. 7 needle; b) If the No. 7 needle is not withdrawn, although it can play a role in fixing the blood vessels, the blood vessels in the punctured section will cause collapse; c) repeated punctures Cause hematoma at the puncture site, cause blood vessel displacement, collapse and other reasons, all increase the difficulty for re-puncture. Therefore, when punctured with a 5ml blue syringe connected to an 18G steel needle, it is often impossible to puncture the target vein at one time, and repeated punctures will inevitably increase damage and increase the incidence of complications.

Utility model content

The purpose of the utility model is to provide an improved central venous puncture needle which can be successfully inserted into a central venous catheter after only one successful puncture, has few puncture complications and has a high success rate in order to overcome the deficiencies of the prior art. the

In order to achieve the above object, the technical solution adopted by the utility model is: a central venous puncture needle, including a needle tube, a needle seat, a side hole, and an indicator point; one end of the needle tube is arranged on the needle seat, and the end of the other end is Needle tip; the needle tip is set in a conical shape; the inner hole of the needle tube communicates with the inner hole of the needle hub; the side hole is set at the end of the needle tube away from the needle hub; the indicating point is set on the needle hub; The said indicating point is on a straight line with the center of the side hole; the outer diameter of said needle tube is 0.7-1mm.

Preferably, the needle tube is provided with a scale. the

Preferably, the needle tube is made of medical stainless steel.

Preferably, the length of the needle tube is 40-60 mm.

Preferably, the inner diameter of the side hole is 0.5-0.8 mm.

Preferably, the needle holder is made of transparent medical engineering plastics, which is convenient for observation during operation.

Preferably, the side hole is arranged at the junction of the needle tip and the linear needle tube.

Due to the application of the above-mentioned technical solution, the utility model has the following advantages compared with the prior art:

When the central venous puncture needle of the utility model performs central venous puncture, dark red blood is withdrawn and unobstructed, and when the central venous puncture needle is determined to be in the target vein, it means that the puncture is successful (success once), and no need to puncture again; The needle seat is provided with an indicator point that is consistent with the direction of the side hole of the needle tip. During the process of inserting the guide wire, the side hole of the needle tip can be fixed in the direction of the proximal end to ensure that the guide wire is inserted into the target vein in the direction of the proximal end; The needle tube of the central venous puncture needle and the needle tube of the expansion tube are marked with scales. When the expansion tube is used to expand the puncture path, the depth of the expansion tube can be accurately grasped, so that the puncture path can be completely expanded and the central venous catheter can be placed more smoothly. The use of the central venous puncture needle of the utility model can not only simplify the puncture operation steps, shorten the puncture operation time, and make the puncture operation more convenient; at the same time, it can avoid the increased damage to the patient caused by repeated puncture, reduce the incidence of complications, and improve the central venous puncture success rate.

Description of drawings

Below in conjunction with accompanying drawing, technical scheme of the utility model is further described:

Accompanying drawing 1 is the front view of central venous puncture needle of the present utility model;

Accompanying drawing 2 is the enlarged view of A part in accompanying drawing 1;

Among them: 1. Needle tube; 2. Needle seat; 3. Side hole; 4. Indication point. the

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Accompanying drawing 1, 2 shows a kind of central venous puncture needle described in the utility model, comprises needle tube 1, needle base 2, side hole 3, indicator point 4; One end of described needle tube 1 is arranged on the needle base 2, The end of the other end is a needle point (not marked); the needle point is set in a conical shape; the inner hole of the needle tube 1 communicates with the inner hole of the needle holder 2; the side hole 3 is arranged between the needle tip and the linear needle tube 1 The connection of the needle tube 1 is connected with the side hole 3; the indicator point 4 is arranged on the needle seat 2; the indicator point 4 is on a straight line with the center of the side hole 3; the needle tube 1 The outer diameter is 0.8 mm; the needle tube is provided with a scale; the needle tube 1 is made of medical stainless steel; the length of the needle tube 1 is 50 mm; enough to meet the normal puncture needs; the inner diameter of the side hole 3 is 0.6 mm ; The needle base 2 is made of transparent medical engineering plastics, which is convenient for observation during operation.

In the puncture process, we also choose dilation tube; its needle tube is made of medical engineering plastics, the outer diameter of the needle tube is 6Fr, the length is 50mm, with scale, the needle tip is conical, and the outer diameter of the needle tip opening is 0.9mm. The needle seat is made of transparent medical engineering plastics.

In the puncture process, we also use a 5ml blue needle syringe. Its production process, material, and shape are the same as the blue needle tube syringe in the central venous puncture package commonly used in clinical practice at present, and the inner diameter of the blue needle hole is 0.6mm.

In the puncture process, we also use a guide wire, whose production process, material, and shape are the same as those in the current clinically used central venous puncture package, with an outer diameter of 0.55mm.

The disposable 5ml syringe and injection needle, central venous catheter, disk clamp, disposable scalpel, suture needle and thread, medical patch and other instruments required for puncture are the same as those in the current clinically used central venous puncture kit.

The method of central venous puncture using the central venous puncture needle described in this utility model and the selected kit (the same method for puncturing the right internal jugular vein from the posterior route as an example): 1) The patient is in a supine position with the head tilted to the left, and the puncture site is routinely sterilized. Lay a drape; 2) Select the sternocleidomastoid muscle posterior edge of the clavicular head and two transverse fingers above the clavicle as the puncture point, and perform local anesthesia; 3) After the puncture point is broken with a 18G skin-breaking needle, connect a 5ml blue needle tube with a central venous puncture needle The syringe is punctured toward the sternoclavicular joint, the needle body is kept horizontal, and the syringe is kept under negative pressure; 4) During the puncture process, the black spot on the needle seat of the central venous puncture needle is kept in line with the puncture direction, and the dark red blood is withdrawn from the syringe and then released. When the puncture needle is confirmed to be in the internal jugular vein, the puncture is successful (one success); 5) Insert the guide wire 220mm into the proximal end of the internal jugular vein through the blue needle syringe, withdraw the central venous puncture needle, and pass the needle according to the puncture depth. The guide wire slowly inserts the dilation tube at the same depth to expand the skin at the puncture point to the blood vessel—the puncture route; 6) Fix the guide wire, insert a 120mm central venous catheter through the guide wire; 7) Fix the catheter, cover the puncture site with medical dressings and films, The catheter is connected to an infusion thong for infusion. the

When the central venous puncture needle of the utility model performs central venous puncture, dark red blood is withdrawn and unobstructed, and when the central venous puncture needle is determined to be in the target vein, it means that the puncture is successful (success once), and no need to puncture again; The needle seat is provided with an indicator point that is consistent with the direction of the side hole of the needle tip. During the process of inserting the guide wire, the side hole of the needle tip can be fixed in the direction of the proximal end to ensure that the guide wire is inserted into the target vein in the direction of the proximal end; The needle tube of the central venous puncture needle and the needle tube of the expansion tube are marked with scales. When the expansion tube is used to expand the puncture path, the depth of the expansion tube can be accurately grasped, so that the puncture path can be completely expanded and the central venous catheter can be placed more smoothly. The use of the central venous puncture needle of the utility model can not only simplify the puncture operation steps, shorten the puncture operation time, and make the puncture operation more convenient; at the same time, it can avoid the increased damage to the patient caused by repeated puncture, reduce the incidence of complications, and improve the central venous puncture success rate. the

The above are only specific application examples of the utility model, and do not constitute any limitation to the protection scope of the utility model. All technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the utility model.

Claims (7)

1. a central vein puncture needle comprises needle tubing, needle stand, side opening, indication point; It is characterized in that: an end of described needle tubing is arranged on the needle stand, and the end of the other end is needle point; Described needle point is arranged to taper shape; The endoporus of described needle tubing is communicated with the endoporus of needle stand; Described side opening is arranged on the end away from the needle tubing of needle stand; Described indication point is arranged on the needle stand; The center of described indication point and side opening point-blank; The external diameter of described needle tubing is 0.7-1mm.

2. central vein puncture needle according to claim 1 is characterized in that: be provided with scale on the described needle tubing.

3. central vein puncture needle according to claim 1 and 2, it is characterized in that: the length of described needle tubing is 40-60 mm.

4. central vein puncture needle according to claim 1 and 2, it is characterized in that: the internal diameter of described side opening is 0.5-0.8 mm.

5. central vein puncture needle according to claim 1 and 2 is characterized in that: described needle stand adopts transparent medical engineering plastics to make, and observes during convenient operation.

6. central vein puncture needle according to claim 1 and 2, it is characterized in that: described side opening is arranged on the junction of needle point and linearity needle tubing.

7. central vein puncture needle according to claim 1 and 2 is characterized in that: described needle tubing adopts medical stainless steel to make.

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