KR101303269B1 - Catheter and introducer needle assembly with safety device - Google Patents

Abstract

The invention comprises a needle shield 41 having a longitudinally extending passageway having an elongated opening 60, wherein at least one spring clip 50 is fitted through the elongated opening 60, A stop means for blocking the enlarged portion 38 of the guide needle 31, the inner diameter of the longitudinally extending passageway being at least slightly larger than the diameter of the guide needle 31, the at least one spring clip 50 A first catch 55 is provided that engages with the catheter hub 24, and at least a portion of the one or more spring clips 50 is provided before the guide needle is withdrawn from the catheter assembly 20. It is directed to a safety device that releases and captures a sharp end tip 32 after compression by the guide needle and withdrawal of the guide needle from the catheter assembly 20.

Catheter, guide needle, safety device, spring clip, needle shield, distal tip

Description

Catheter-guided needle assembly with safety device {CATHETER AND INTRODUCER NEEDLE ASSEMBLY WITH SAFETY DEVICE}

1 is a view showing a catheter-guided needle assembly with a safety device of the present invention.

Figure 2 is a view showing the induction needle tip received by the safety device of the present invention after the recovery of the induction needle.

3 shows a safety device comprising a spring clip fitted from a top end into a plastic needle shield and clipped in place by a U-shaped clip and having a hole coincident with the hole of the needle shield, (a) is a plan view; (b) is a front view, (c) is a perspective view, (d) is a side view.

4 is a view showing the shape of the spring clip of the first embodiment, (a) is a bottom view, (b) is a front view, (c) is a top view, (d) and (f) is a side view, (e) and (g) is a perspective view.

5 is a view showing the structure of the needle shield of the present invention, (a) is a perspective view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a plan view.

6 is an enlarged view showing a needle shield and a spring clip for receiving the guide needle tip at the distal end;

FIG. 7 shows a needle shield and a spring clip, with one or more rails arranged on the outer periphery of the shield body to allow easy sliding with minimal contact.

8 is a cross-sectional view showing the safety device of the present invention accommodated by the guide needle hub and the catheter hub.

9 is an enlarged cross-sectional view of the guide needle and catheter assembly, wherein the safety device is housed by the guide needle hub and the catheter hub, and the V-shaped bend of the spring clip is engaged with the recess on the catheter hub.

FIG. 10 shows the stage where the guide needle is being recovered, the guide needle notch is still received by the head of the septum, the end wall of the spring clip is still compressed by the guide needle, and the V-bend Is associated with a recess on the catheter hub.

11 is a view showing a step in which the guide needle is being recovered, the guide needle passed through the end wall of the spring clip, the end wall of the spring clip is decompressed by the guide needle to move the guide needle tip toward the end direction And the V-bend is still associated with the recess of the catheter hub.

12 is a view showing a stage in which the guide needle is being recovered, the V-bend is separated from the recess of the catheter hub, the needle shield is separated from the catheter hub, and the bump shape on the guide needle moves toward the proximal direction. And an extension nose at the proximal end of the needle shield prevents blood from leaking from the guide needle notch.

13 is a view showing the shape of the guide needle having a crimped bump and a flashback notch.

14 is a view showing the shape of the guide needle having a 3D bump and notches.

15 is a view showing the safety device of the second embodiment of the present invention, (a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a perspective view, and (e) is a side view.

16 is a view showing a spring clip used in the safety device of the second embodiment, (a) is a left side view of the second spring clip, (b) is a front view of the second spring clip, (c) is a second spring Perspective view of the clip, (d) is a right side view of the second spring clip, (e) is a perspective view of the first spring clip, (f) is a left side view of the first spring clip, and (g) is a front view of the first spring clip , (h) is a right side view of the first spring clip.

FIELD OF THE INVENTION The present invention relates to catheter and introducer needle assemblies, and more particularly to safety devices for catheter-guided needle assemblies.

Vascular catheters, particularly intravenous catheters, are used to administer fluids such as saline, various medications, and total parenteral administration nutrients to a patient, or to draw blood from a patient. Peripheral venous catheters are relatively short and are generally about 2 inches or less in length. The most common type of venous catheter is a peripheral venous catheter mounted on a needle. As the name implies, the catheter mounted on the needle is mounted on an induction needle with a sharp distal tip. The catheter and guide needle are assembled such that the distal tip of the guide needle extends beyond the distal tip of the catheter so that the slope of the needle is spaced up from the patient.

The catheter-guided needle assembly is inserted through the patient's skin at a shallow angle into the peripheral blood vessels, one of the branches of the main blood vessel, which is not directly connected to the heart but directly to the heart. In one technique, the needle and the catheter are fully inserted into the blood vessel together. In another technique, the needle is retracted towards the catheter in part after the initial venipuncture. Thereafter, the catheter is fully inserted into the blood vessel.

After the assembly is inserted into the vessel, it is important to verify that the assembly is properly positioned within the vessel. To confirm that the assembly is properly positioned in the blood vessel, the operator checks whether the blood is flashed back into the needle and a flashback chamber located at the proximal end of the needle. The flashback chamber is generally formed as part of the needle hub. Alternatively, the guide needle may include an opening formed along the flashback notch or distal end so that a flashback of blood may be observed in the annular space between the guide needle and the catheter if the catheter is transparent or at least translucent. Once confirmed to be properly positioned, the operator presses the patient's skin on the guide needle and the distal tip of the catheter with a finger to apply pressure to the vessel. This acupressure occludes additional blood flow through the needle. Occlusion of blood flow can also occur through the septum. The operator retrieves the guide needle while leaving the catheter in place and attaches a fluid supply device, PRN or dead ender cap to the catheter. Once the needle is withdrawn from the catheter, it is a "blood sharp object" and must be handled appropriately.

Recently, there has been a great interest in the operator's infection with the patient's blood and the recognition that "blood-contaminated sharps" should be disposed of immediately. This interest has arisen because of the emergence of untreated and fatal diseases at present, such as acquired immunodeficiency syndrome (AIDS), which can be transmitted by the exchange of fluid from an infected person to another person. Therefore, the body fluids of AIDS infected people should not be contacted. As mentioned above, if the needle was used to position a catheter in the blood vessels of an AIDS infected person, the needle would be the infectious agent of the disease. Although the practitioner is aware of the need to properly handle "blood-contaminated sharps," unfortunately, in the medical environment, such as in an emergency or carelessness or neglect, the sticking of infected needles still occurs.

Several safety devices have been developed to address the problem of being stuck in a "blood sharp object".

US 6,287,278 discloses a venous catheter comprising a spring clip for protecting a user. However, the venous catheter does not have a shield surrounding the spring clip. The spring clip may protect the user from contact with the needle tip, but not from contact with the blood remaining in the needle tip, especially if there are some openings, such as a flashback notch around the needle. . Thus, the intravenous catheter of US 6,287,278 is still somewhat unsafe to the user.

US 5,215,528 discloses a catheter guide device assembly comprising a metal clip that protects a user from a needle stick when the catheter is inserted into a blood vessel and the guide needle is removed from the catheter. As shown in the drawing of US 5,215,528, the catheter guide assembly includes an arcuate protrusion forming a plurality of arcuate protrusions 50 extending from the flange 48 and a receptacle 53 for holding the catheter adapter 52. It includes. One end of the tubular body 38 forms a nose portion 38a for extension in the catheter adapter. Both ends of the protrusion include an inwardly projecting lip 54 to releasably retain the flange 56 of the catheter adapter. The arcuate protrusions 50 and the lip 54 are designed to engage the flange 56 to push the tip cover away from the needle hub by the tabs 48b rather than removing the catheter adapter 52 from the receptacle 53. It is easier. However, this binding relationship is not reliable because of manufacturing tolerances. As such, the separation between the catheter adapter and the needle tip cover is unpredictable and may occur before the needle tip is securely protected. This uncertain behavior is not suitable in environments where accuracy and reliability are required.

Therefore, there is a need to overcome the aforementioned disadvantages by improving the safety device for the catheter-guided needle assembly.

An object of the present invention is a needle shield for catheter-guided needle assembly, which can prevent the user from being in contact with the needle tip as well as being stuck to the needle tip after the catheter is inserted into the vessel and the guide needle is removed from the catheter. To provide.

Another object of the present invention is to provide a safety device for a catheter-guided needle assembly, which is provided with perfect separation precision and reliability between the catheter adapter and the needle shield.

The object of the present invention is achieved by a safety device for a catheter-guided needle assembly, the catheter-guided needle assembly,

A catheter assembly comprising a catheter having a proximal end and a distal end, and a catheter hub attached to the proximal end of the catheter, and

An induction needle assembly comprising a sharp end tip, a proximal end, and a guide needle having an enlargement between the sharp end tip and the proximal end, and a needle hub attached to the proximal end,

The safety device is slidably connected between the catheter assembly and the guide needle assembly,

The safety device includes a needle shield having a longitudinally extending passage having an elongated opening, a spring clip fitted into the longitudinally extending passage through the elongated opening, and stop means for blocking an enlargement of the guide needle, A longitudinal extension passage allows the guide needle to extend longitudinally through the needle shield, the spring clip having a first catch coupled with the catheter hub and a second catch for holding the needle shield, the spring At least a portion of the clip is adapted to be released by the guide needle before the guide needle is withdrawn from the catheter assembly and to release and capture the sharp distal tip after the guide needle is withdrawn from the catheter assembly.

The present invention also provides a catheter-guided needle assembly, wherein the catheter-guided needle assembly,

A catheter assembly comprising a catheter having a proximal end and a distal end, and a catheter hub attached to the proximal end of the catheter,

An induction needle assembly comprising a sharp end tip, a proximal end, and a guide needle having an enlarged portion between the sharp end tip and the proximal end, and a needle hub attached to the proximal end;

A safety device slidably connected between the catheter assembly and the guide needle assembly,

The safety device includes a needle shield having a longitudinally extending passage having an elongated opening, a spring clip fitted into the longitudinally extending passage through the elongated opening, and stop means for blocking an enlargement of the guide needle, A longitudinal extension passage allows the guide needle to extend longitudinally through the needle shield, the spring clip being provided with a first catch coupled with the catheter hub and a second catch for holding the needle shield, the spring At least a portion of the clip is adapted to be compressed by the guide needle before the guide needle is withdrawn from the catheter assembly and to release and capture the sharp distal tip after the guide needle is withdrawn from the catheter assembly.

Advantages of the present invention will become more apparent from the preferred embodiments with reference to the accompanying drawings.

As used herein, the terms “proximal” and “distal” refer to locations on the catheter-guided needle assembly relative to the guide needle hub 34.

As shown in Figures 1 and 2, the catheter-guided needle assembly with the safety device of the first embodiment of the present invention is denoted by reference numeral 10 in its entirety, the catheter assembly 20, guide needle assembly 30 , And safety devices.

The catheter assembly 20 includes a catheter 21, which has a proximal end, a distal end, and a catheter hub 24 attached to the proximal end of the catheter 21. Suitable materials for the catheter 21 include, but are not limited to, thermoplastic resins such as polytetrafluoroethylene (PTFE), polyurethane, and the like. The catheter 21 is preferably formed of a transparent or at least opaque material to observe the flashback from the flashback notch (if present). Suitable materials for the catheter hub 24 include, but are not limited to, thermoplastic polymer resins such as polycarbonate, polystyrene, polypropylene, and the like.

The guide needle assembly 30 includes a guide needle 31 having a sharp distal tip 32 made by an inclined surface and a proximal end connected to the needle hub 34. Guide needle 31 is preferably formed of stainless steel. Preferably, the guide needle 31 may be provided with a flashback notch 35. Alternatively, the needle assembly may also include a flashback chamber instead of a flashback notch. Needle hub 34 may include a tab 36 extending radially outward for holding. Needle hub 34 may be formed of the same or a different type of material than the material used to form catheter hub 24.

The safety device 40 comprises a needle shield 41, which is preferably made of plastic, as shown in FIG. 3. When the catheter 21 is inserted into the blood vessel and the guide needle 31 is removed from the catheter 21, the safety device 40 holds the guide needle tip as shown in FIG. 2 to puncture the user with a needle. Protect from The needle shield 41 again forms a longitudinally extending passage having a proximal end 43, a distal end 44, and an intermediate chamfer portion 45. The longitudinally extending passage allows the guide needle 31 to extend longitudinally through the needle shield 41. The diameter of the proximal end 43, the distal end 44, and the intermediate chamfer 45 is at least slightly larger than the diameter of the main shaft portion of the guide needle 31. For this reason, the main shaft part of the guide needle 31 can pass easily through the base end part 43, the distal end part 44, and the intermediate chamfer part 45. As shown in FIG. As shown in FIGS. 3A and 3B, at least a portion of the intermediate chamfer portion 45 has an elongated opening 60 in the longitudinal direction.

The safety device 40 also includes a spring clip 50 which is preferably made of spring metal. The spring clip 50 is disposed in the intermediate chamfer portion 45 through the opening 60. The spring clip 50 includes a proximal wall 51, an intermediate wall 54, and a distal wall 53, in which an opening 52 is formed, as shown in FIG. 4. As shown in FIG. 4B (front view of the spring clip 50), the proximal wall 51 is connected to one end of the intermediate wall 54 and the proximal wall 51 is the intermediate wall 54. Substantially perpendicular to The end wall 53 is connected to the other end of the intermediate wall 54 with a bend 55 interposed therebetween. The bend 55 protrudes to opposite sides of the proximal wall 51 and the distal wall 53 of the intermediate wall 54. Preferably, bend 55 is an inverted V-shaped bend. The bend 55 of the spring clip 50 is to be used as a catch that is connected to the catheter hub 24. The end wall 53 is shaped to be compressed by the guide needle before the clip actuation and to be decompressed after the clip actuation. This will be described below.

Preferably, the end wall 53 has at its free end a portion with a narrower width than the other parts of the end wall. The part with this reduced width is bent by the guide needle before the clip is operated.

Preferably, the proximal wall 51 has a second catch feature 57 at its free end. For example, the second catch feature 57 can be formed by folding the free end of the proximal wall 51 into a U-shaped catch. This U-shaped catch is snapped to the corresponding portion of the inner wall of the needle shield. The corresponding portion may be an indent provided in the intermediate chamfer portion 45.

Preferably, the opening 52 has a reinforced lip on the circumference to grip the enlarged portion (bump shape, etc.) of the guide needle shaft. Alternatively, the diameter of the enlarged portion of the guide needle shaft is smaller than the opening 52 but larger than the proximal end 43 so that the enlarged portion of the guide needle shaft can be gripped when the guide needle is recovered.

As shown in FIG. 3, the spring clip 50 is fitted into the plastic needle shield 41 through the opening 60 and clipped in place by the second catch 57 of the clip 50, and the proximal wall ( The opening 52 of 51 coincides with the proximal end opening of the needle shield 41. As best seen in FIG. 3 (b), the inverted V-shaped bend 55 of the spring clip protrudes beyond the outer wall of the needle shield 41. The end wall 53 is interposed in the extension passage of the main body 41 between the opening of the proximal end 43 and the opening of the distal end 44 when the guide needle is completely recovered from the catheter (after the clip operation).

5 shows the structure of the needle shield 41 of the first embodiment of the present invention. The needle shield 41 is molded of plastic or other material and has a through hole along the axis of the passage of the guide needle. Flexure latches 47 made of plastic are preferably provided to mate with the U-shaped catches 57 of the spring clips 50 to prevent the spring clips from deviating from the needle shield 41.

6 shows the needle shield 41 and the spring clip 50 to receive the distal end of the guide needle after the guide needle has been completely withdrawn from the catheter. In the case of the guide needle in the structure of FIG. 1, the base end part is attached to the needle hub 34 which accommodates the safety device 40. As shown in FIG.

As shown in FIG. 7, one or more rails 49 are provided on the outer circumference of the needle shield. These rails 49 assist the needle shield to slide easily from the needle hub 34 by minimal contact between the needle shield 41 and the needle hub 34.

FIG. 8 is a cross-sectional view showing the state of the catheter-guided needle assembly in which the safety device 40 is received by the needle hub 34 and the catheter hub 24 before the guide needle is withdrawn from the catheter 21. The proximal end of the safety device 40 is housed by the needle hub 34, and the distal end of the safety device 40 is housed by the catheter hub 24. The catheter hub 24 is provided with a recess 25. The inverted V-shaped catch of the spring clip 50 is engaged with the recess 25. 9 is an enlarged cross-sectional view of the catheter-guided needle assembly 10 in the state of FIG. 8, with the guide needle 31 slightly recovered.

Although the present invention has been described with reference to a catheter assembly 20 having a diaphragm 29, the safety device of the present invention may be used in conjunction with another type of catheter assembly 20 without the diaphragm 29, for example. .

In normal use, when catheter 21 is properly inserted into the vessel, guide needle 31, which preferably has flashback notch 33 (see FIGS. 13, 14), is removed from catheter 21. 10-12 show various states in which the needle 31 is withdrawn from the catheter assembly 20.

10 shows that the flashback notch 33 of the guide needle 31 has been moved to the head of the diaphragm 29, and the distal wall 53 of the spring clip 50 is still compressed by the guide needle. Indicates.

FIG. 11 shows a state in which the end wall 53 of the spring clip 50 is shot so that the end wall 53 captures the return of the needle tip in the distal direction since there is no further obstruction from the guide needle 31. .

FIG. 12 shows a state in which the tip of the guide needle slides in the distal direction and is captured by the distal wall 53 of the spring clip 50. The enlarged portion 38 of the guide needle is connected to the guide needle 31. Prevents slide movement in the proximal direction. An extension nose 46 at the distal end of the needle shield 41 helps to prevent blood from leaking from the needle tip or flashback notch 33 (if present). Further pulling the guide needle in the proximal direction, the conducted V-shaped catch 55 of the spring clip 50 separates from the recess 25 of the catheter hub 24. As a result, the needle shield 41 is separated from the catheter hub 24.

In the above embodiment, the enlarged portion 38 on the guide needle 31 may be a bump. As shown in FIG. 13, the bump is preferably a crimped bump, followed by a flashback notch 33. The crimped bumps are preferably made by pinching or crimping two points of the needle. The axes of the two points must intersect and coincide with the axes of the guide needle 31.

As shown in FIG. 14, the enlarged portion 38 of the guide needle 31 may take several different forms. For example, in the embodiment described herein, enlargement portion 38 is a diameter enlargement portion 38 that may take the form of bumps on a needle, as described in US Pat. No. 5,215,528 and as incorporated herein. The diameter-expanded portion 38 includes an intermediate portion whose outer diameter is larger than the outer diameter of the main portion of the guide needle 31, a tapered base end extending from the middle portion toward the base end of the guide needle 31, and a guide needle from the middle portion. And tapered distal end extending towards the distal end of 31). Although the diameter expansion part 38 was described as having a symmetrical shape, this is not a requirement.

The diameter of the diameter expanding portion 38 should be larger than the outer diameter of the shaft portion of the guide needle 31 but substantially smaller than the inner diameter of the distal end 44 of the longitudinally extending passageway. Due to this, the guide needle 31 can be pulled in the proximal direction toward the safety device 40. In order to prevent the induction needle 31 from being pulled completely from the safety device 40 toward the proximal end, the proximal end 43 of the longitudinally extending passageway is smaller than the diameter expanding portion 38 so that the induction needle 31 is proximal to the proximal end 43. It shall be prevented from moving further through.

Alternatively, and preferably, the diameter of the opening 52 of the proximal wall 51 of the spring clip 50 is slightly larger than the diameter of the main portion of the guide needle 31, but rather than the diameter of the diameter expanding portion 38. small. In this case, when the guide needle 31 is moved toward the proximal end with respect to the safety device 40, the diameter expanding portion 38 is engaged with the opening 52 of the proximal wall 51 but the proximal end 43 of the needle shield 41. ) Is not combined. This prevents the guide needle 31 from being completely removed from the needle shield 41 in the proximal direction.

To position the catheter 21 in the blood vessel of the patient, the operator aligns the guide needle 31 and the catheter 21 substantially longitudinally with the blood vessel to be treated. The inclined surface of the guide needle should face substantially opposite the skin surface during venipuncture. The operator inserts the needle 31 and the catheter 21 into the skin at a shallow angle, preferably less than about 35 degrees, so that the sharp distal tip 32 enters the blood vessel to be treated. In addition, the operator may observe the blood flashback in the flashback chamber of the needle hub 34 or the blood flashback passing through the flashback notch 33 of the guide needle 31.

After the guide needle 31 and the catheter 21 are securely positioned in the blood vessel to be treated, the operator advances the catheter 21 along the guide needle 31 toward the axial end to position the blood vessel in the blood vessel. In some techniques, the needle 31 may be partially moved towards the catheter 21 before the catheter 21 is fully advanced to be placed in the vessel. After the catheter 21 is properly positioned, the operator places the finger of the other hand on the patient's skin over the blood vessel on the distal end of the catheter 21. By placing a finger over the patient's skin and applying sufficient pressure to the skin, the operator can substantially block blood flow through the catheter 21, or if the catheter assembly 20 is provided with a septum 29, Blood flow may be blocked by the diaphragm 29. Then, the operator completely withdraws the guide needle 31 from the catheter 21 by moving the needle hub 34 toward the proximal end. This movement causes the tip of the guide needle 31 to move toward the proximal end toward the safety device 40. However, the inverted V-shaped bend of the spring clip acting as a recess of the catch and catheter hub allows the needle shield 41 to retain engagement with the catheter hub 24 during at least the initial proximal movement of the guide needle 31. do. Continued application of proximal force to the needle hub 34 results in the inverted V when the sharp distal tip 32 is positioned in the safety device 40 and the guide needle 31 is locked by the spring clip 50. The za bend is separated from the recess of the catheter hub 24. After the guide needle 31 and safety device 40 are removed from the catheter hub 24, the operator attaches a fluid supply device, PRN or dead ender cap to the catheter and begins the planned treatment. In addition, the needle 31 and the needle shield 41 may be disposed according to the disposal rule of the facility.

Fig. 15 shows the safety device of the second embodiment of the present invention, and Fig. 16 shows the spring clip used for the safety device of the second embodiment. Here, only the differences between the first embodiment and the second embodiment will be described. The difference between the first embodiment and the second embodiment is that although the spring clip 50 of the first embodiment is divided into two parts, in the second embodiment the first spring clip 50a and the second spring clip ( 50b). The first spring clip 50a includes an intermediate wall 54, an end wall 53, and a bend 55 therebetween. The second spring clip 50b includes a proximal wall 51 with an opening 52 formed therein, and the proximal wall 51 includes a U-shaped catch 57 formed by folding the free end. In the second embodiment, the first spring clip 50a is fitted to the needle shield 41 by joining the free end of the intermediate wall 54 to the corresponding portion of the needle shield 41 and the second spring clip 50b. Is fitted to the needle shield 41 by engaging the U-shaped catch 57 with the bent latch 47 provided on the needle shield 41. Alternatively, the second spring clip 50b of the second embodiment may be replaced with a washer having a hole, the diameter of which is larger than the shaft portion of the guide needle 31 and the enlarged portion of the guide needle 31 ( Less than 38)

The first catch of the spring clip of the present invention may take another form, for example the spring clip may comprise a ball hole in the spring clip to take the position of the inverted V-shaped bend, This ball hole may be engaged with a ball bearing provided in the catheter hub.

The spring clip 50 of the present invention has two functions. One function is to protect the user from contact with the guide needle tip. Another function is to allow a catch, such as an inverted V-shaped bend or ball hole, to engage the catheter hub 24.

As mentioned above, although the present invention has been described through examples, these examples are not intended to limit the present invention, those skilled in the art can make modifications and changes, and the protection scope of the present invention is defined by the claims.

According to the present invention, a needle shield for a catheter-guided needle assembly is provided that can prevent a user from being in contact with a needle tip as well as being stuck to the needle tip after the catheter is inserted into the vessel and the guide needle is removed from the catheter.

In addition, a safety device for a catheter-guided needle assembly is provided that provides complete separation precision and reliability between the catheter adapter and the needle shield.

Claims (20)

In the safety device 40 for the catheter-guided needle assembly 10, The catheter-guided needle assembly 10, A catheter assembly 20 comprising a catheter 21 having a proximal end and a distal end, and a catheter hub 24 attached to the proximal end of the catheter 21, and Guide needle 31 having a sharp end tip 32, a proximal end, and a diameter enlargement 38 having a bump shape on the needle between the sharp end tip and the proximal end, and a needle hub 34 attached to the proximal end. Including needle guide assembly 30 comprising a, The safety device 40 is slidably connected between the catheter assembly 20 and the guide needle assembly 30, The safety device 40 includes a needle shield 41 formed with a longitudinally extending passageway having an elongated opening 60, and at least one spring clip fitted into the longitudinally extending passageway through the elongated opening 60. 50, and stop means 43 for blocking the diameter expanding portion 38 of the guide needle 31, wherein the longitudinally extending passages allow the guide needle 31 to support the needle shield 41. Extend longitudinally through the spring clip 50, the spring clip 50 having a first catch 55 engaged with the catheter hub 24, at least a portion of the spring clip 50 being guided Before the needle is withdrawn from the catheter assembly 20, the needle is compressed by the guide needle and after the guide needle is withdrawn from the catheter assembly 20, the sharp end tip 32 is released and captured. Safety device 40 for catheter-guided needle assembly (10), characterized in that. The method of claim 1, The one or more spring clips 50 include a proximal wall 51, an intermediate wall 54, and a distal wall 53, the proximal wall 51 being connected to one end of the intermediate wall 54. And the end wall 53 is connected to the other end of the middle wall 54, and the first catch is coupled to the middle wall 54 and the end wall 53 to engage the catheter hub 24. A bend provided between and the end wall (53) is at least part of the spring clip (50), the safety device (40) for the catheter-guided needle assembly (10). 3. The method of claim 2, The distal wall 53 has a portion at its free end that has a smaller width than the other portion of the distal wall, wherein the reduced width portion is at least part of the spring clip 50. Safety device 40 for guided needle assembly 10. 3. The method of claim 2, A free end of the proximal wall 51 is formed with a U-shaped catheter-guided needle assembly, characterized in that the U-shaped portion is snapped to the indent 47 on the needle shield ( 10) safety device (40). 5. The method according to any one of claims 2 to 4, An opening 52 is formed in the base wall 51, and the guide needle shaft can pass through the opening 52, and an inner diameter of the opening 52 is an enlarged diameter 38 of the guide needle. Safety device (40) for catheter-guided needle assembly (10), characterized in that smaller than). The method of claim 5, The opening (52) is a safety device (40) for a catheter-guided needle assembly (10), characterized in that it has a reinforced lip for gripping the enlarged diameter portion (38) of the guide needle on the outer periphery. 5. The method according to any one of claims 1 to 4, The diameter expanding portion 38 is a catheter-guided needle assembly 10, characterized in that it is one of a crimped bump, a 3D bump, a rolled bump, or a ferrule on the guide needle. Safety device 40). 3. The method of claim 2, The catheter hub (24) has a recess, wherein the bend is coupled with the recess, the safety device (40) for the catheter-guided needle assembly (10). The method of claim 1, The first catch is a ball hole (ball hole) formed in the upper portion of the spring clip, the ball hole safety for the catheter-guided needle assembly 10, characterized in that coupled with the ball bearing provided in the catheter hub Device 40. 5. The method according to any one of claims 1 to 4, Safety device (40) for a catheter-guided needle assembly (10), characterized in that at least one rail (49) is provided on the outer circumference of the needle shield. In the catheter-guided needle assembly 10, The catheter-guided needle assembly 10, A catheter assembly 20 comprising a catheter 21 having a proximal end and a distal end, and a catheter hub 24 attached to the proximal end of the catheter 21, Guide needle 31 having a sharp end tip 32, a proximal end, and a diameter enlargement 38 having a bump shape on the needle between the sharp end tip and the proximal end, and a needle hub 34 attached to the proximal end. Induction needle assembly 30 comprising a, and A safety device 40 slidably connected between the catheter assembly 20 and the guide needle assembly 30, The safety device 40 includes a needle shield 41 having a longitudinally extending passageway having an elongated opening 60, and one or more spring clips 60 fitted into the longitudinally extending passageway through the elongated opening 60. And a stop means 43 for blocking the diameter expanding portion 38 of the guide needle 31, wherein the longitudinally extending passageway has a length of the guide needle 31 through the needle shield 41. Extending in a direction, the spring clip 50 is provided with a first catch 55 engaged with the catheter hub 24, and at least a portion of the spring clip 50, wherein the guide needle has the catheter assembly. It is compressed by the guide needle prior to recovery from 20 and is intended to release and capture the sharp distal tip 32 after the guide needle is withdrawn from the catheter assembly 20. Catheter-guided needle assembly (10), characterized in that. 12. The method of claim 11, The one or more spring clips 50 include a proximal wall 51, an intermediate wall 54, and a distal wall 53, the proximal wall 51 being connected to one end of the intermediate wall 54. And the end wall 53 is connected to the other end of the middle wall 54, and the first catch is coupled to the middle wall 54 and the end wall 53 to engage the catheter hub 24. A catheter-guided needle assembly (10), characterized in that a bend provided between said end wall (53) is at least part of said spring clip (50). The method of claim 12, The distal wall 53 has a portion at its free end that has a smaller width than the other portion of the distal wall, wherein the reduced width portion is at least part of the spring clip 50. Guide needle assembly (10). The method of claim 12, A catheter-guided needle assembly (10), characterized in that a U-shaped portion is formed at the free end of the proximal wall (51), and the U-shaped portion snaps to a curved portion (47) on the needle shield. 15. The method according to any one of claims 12 to 14, An opening 52 is formed in the base wall 51, and the guide needle shaft can pass through the opening 52, and an inner diameter of the opening 52 is an enlarged diameter 38 of the guide needle. Catheter-guided needle assembly (10), characterized in that smaller than). 16. The method of claim 15, The opening (52) has a catheter-guided needle assembly (10), characterized in that it has a reinforcing lip for gripping the enlarged diameter portion (38) of the guide needle on the outer periphery. 15. The method according to any one of claims 11 to 14, The catheter-guided needle assembly (10), wherein the diameter expanding portion (38) is one of crimped bumps, 3D bumps, rolled bumps, or ferrules on the guide needle. The method of claim 12, The catheter hub (24) has a recess, the catheter-guided needle assembly (10), characterized in that the bend is coupled with the recess. 12. The method of claim 11, The first catch is a ball hole formed in the upper portion of the spring clip, the ball hole is catheter-guided needle assembly (10), characterized in that coupled with the ball bearing provided in the catheter hub. 15. The method according to any one of claims 11 to 14, Catheter-guided needle assembly (10), characterized in that at least one rail (49) is provided on the outer circumference of the needle shield.

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