Needle-free transfusion port needle system with puncture prevention and blood backflow early warning functions

Abstract

The invention relates to the technical field of medical equipment, in particular to a needleless transfusion harbor needle system with puncture prevention and blood backflow early warning functions, which comprises a harbor seat embedded in the body of a patient and a harbor needle matched with the harbor seat for injection, and a fixing block for fixing the harbor needle is arranged on the harbor needle. The fixing block is provided with an infusion tube communicated with the port needle, and the fixing block is provided with a butterfly wing convenient for medical staff to hold; a protection device is arranged outside the harbor needle and comprises a connecting plate fixed to the fixing block and a protection sleeve assembly fixed to the connecting plate, and the protection sleeve assembly can stretch out and draw back freely and surrounds the harbor needle. The needle withdrawal device has the effect of reducing the probability that medical staff are punctured in the needle withdrawal process.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of medical equipment, and in particular to a needleless infusion port needle system with anti-stabbing and blood backflow early warning functions. BACKGROUND

[0002] An infusion port is a completely implanted infusion and drug delivery system implanted in the human body, also known as an implantable drug delivery device, which includes a catheter connected to a central vein, and the catheter end is connected to an injection seat. The whole device is completely implanted in the body and has the characteristics of long retention time and few complications. The catheter tip is located in the superior vena cava, which can quickly dilute the drug concentration and avoid stimulating and damaging the blood vessel wall. After the infusion port is implanted, the patient's daily life is not restricted, and the quality of life is improved. In actual clinical practice, a puncture needle is used in cooperation with the infusion port. When the drug solution needs to be injected, the puncture needle is inserted into the injection seat to form a needle channel, and the drug solution is injected into the storage cavity in the infusion port through the puncture needle, and then the drug solution is injected into the patient's body through the catheter.

[0003] An implantable intravenous infusion port is a medical device completely implanted in a blood vessel channel, which provides a long-term intravenous blood vessel channel for patients. The infusion port uses a non-traumatic needle (infusion port needle), which is specially designed for the infusion port. In use, the needle body of the infusion port needle is usually vertically inserted into the infusion port. In order to facilitate the insertion of the needle body of the infusion port needle into the infusion port, a butterfly wing is usually provided on the infusion port needle for easy hand holding. During use, the medical staff pinches the butterfly wing with their fingers, inserts the needle body of the infusion port needle into the infusion port, and after the insertion is completed, the needle body of the infusion port needle needs to be fixed. At this time, the part (such as the anti-puncture disc and the butterfly wing) connected with the needle body and located outside the patient's skin is pasted on the patient's skin by a medical transparent adhesive film.

[0004] In combination with actual work, it is found that when the port needle and the port seat are connected or disconnected, although a non-traumatic needle is used, when the needle is pulled out, due to the tight texture of the silicone puncture diaphragm at the top of the infusion port base, the friction force of the port seat on the needle body is large (such as the safety type non-traumatic infusion port needle disclosed in the utility model patent with publication number CN219001474U and the stable anti-falling infusion port and non-traumatic needle disclosed in the utility model patent with publication number CN215023802U), the nurse uses the left hand to fix the infusion port base, and the right hand often needs to be very forceful to pull out the non-traumatic needle. However, the right hand often bounces back involuntarily due to inertia at the moment when the butterfly wing non-traumatic needle is pulled out, which can easily lead to needle stab injuries of the nurse's fingers or the patient's puncture site skin. According to statistics, needle stab injuries caused by nurses account for more than 30% of occupational exposure events, especially when operating on patients with infectious diseases such as syphilis, hepatitis B, HIV, etc., the risk is extremely high. In addition, there is also a potential risk of stab injury in the disposal of discarded port needles. SUMMARY

[0005] In order to reduce the probability of medical staff being stabbed in the process of pulling out the needle, the application provides a needleless infusion port needle system with anti-stabbing and blood backflow warning function.

[0006] The application provides a needleless infusion port needle system with anti-stabbing and blood backflow warning function, which adopts the following technical scheme: A needleless infusion port needle system with anti-stabbing and blood backflow warning function comprises a port seat embedded in the body of a patient and a port needle used for injection matched with the port seat, a fixing block fixed to the port needle is arranged on the port needle, a transfusion tube in communication with the port needle is arranged on the fixing block, and a butterfly wing facilitating the medical staff to hold is arranged on the fixing block; a protective device is arranged outside the port needle, the protective device comprises a connecting plate fixed to the fixing block and a protective sleeve assembly fixed to the connecting plate, the protective sleeve assembly can be freely telescoped, and the protective sleeve assembly surrounds the port needle.

[0007] By adopting the above technical scheme, when the medical staff pulls out the port needle from the port seat after the infusion is completed, the protective sleeve assembly arranged can automatically telescope and surround the port needle inside, thereby preventing the port needle from stabbing the medical staff.

[0008] Preferably, the protective sleeve assembly comprises a plurality of protective cylinders which are slidably matched with each other, and the plurality of protective cylinders are sleeved with each other.

[0009] By adopting the above technical scheme, the plurality of slidably matched protective cylinders can be sleeved to allow the plurality of protective cylinders to be contracted together, reduce the length of the protective cylinder, allow the port needle to leak out from the inside of the protective sleeve, and allow the port needle to be inserted and matched to the port seat, when the port needle is pulled out from the port seat, the plurality of protective cylinders automatically slide and extend to wrap and protect the port needle.

[0010] Preferably, the protective sleeve assembly further comprises a sliding clamping piece arranged between adjacent two protective cylinders, which comprises a sliding groove arranged on the inner wall of the previous protective cylinder and a sliding block fixed to the outer wall of the next protective cylinder, and the sliding block is slidably clamped into the sliding groove.

[0011] By adopting the above technical scheme, the cooperation of the sliding block and the sliding groove can guide the sliding of the protective cylinder, allow it to slide and extend in the direction of the sliding groove, and make the sliding process more stable, and prevent the adjacent protective cylinders from being disconnected.

[0012] Preferably, a plurality of groups of sliding clamping pieces are arranged on the adjacent two protective cylinders, and the sliding grooves and the sliding blocks of the plurality of groups are circumferentially and uniformly arranged on the two protective cylinders.

[0013] By adopting the technical scheme, the multiple sets of sliding clamping pieces are arranged to make the extension and retraction of the protective cylinder more stable and prevent disconnection between the adjacent two protective cylinders.

[0014] Preferably, the sliding groove is in a spiral structure on the inner wall of the protective cylinder, and the adjacent two protective cylinders can rotate and slide relative to each other.

[0015] By adopting the technical scheme, the adjacent two protective cylinders can rotate relative to each other during the extension and retraction, so that the protective cylinder can be extended by rotation, and in the use process, the protective cylinder can be retracted by being pressed down, and a unique rotation feeling is brought in the process, clear operation feedback is provided for medical staff, and the rotation extension and retraction are more stable and have less noise during the extension and retraction.

[0016] Preferably, the protective sleeve assembly further comprises a spiral spring arranged in the multiple protective cylinders, and the spiral spring is fixed at the upper end of the connecting plate and at the lower end of the end portion of the protective cylinder away from the connecting plate.

[0017] By adopting the technical scheme, under the action of the spiral spring, the multiple protective cylinders are in an elongated state, when the patient is to be punctured, the port needle is aimed at the port seat and inserted downward, during the puncturing process, the multiple protective cylinders are compressed into the last protective cylinder, and then the port needle is fixed to the patient's body; when the port needle is pulled out, under the action of the elastic force of the spiral spring, the protective cylinder can be quickly extended to quickly wrap the port needle, so as to avoid the port needle from injuring the medical staff.

[0018] Preferably, the protective sleeve assembly further comprises a locking piece arranged on the adjacent two protective cylinders, the locking piece comprises a locking hole arranged on the protective cylinder and penetrating through the protective cylinder, the locking hole is located at the position of the sliding groove close to the end portion of the other protective cylinder, the sliding block is in an extension structure and comprises a fixed portion and an extension portion, and the extension portion can be inserted and matched in the locking hole.

[0019] By adopting the technical scheme, the extension portion can be extended outward by the elastic piece, and when the sliding block slides in the sliding groove, the extension portion is compressed and retracted into the fixed portion, when the patient is to be punctured, the protective cylinder is pressed down first to make the sliding block separate from the position of the locking hole, and the protective cylinder is continuously pressed down until the port needle is inserted in place, and when the port needle is pulled out, under the action of the spiral spring, the protective cylinder is quickly extended, and when the protective cylinder is elongated to the specified position, the extension portion is inserted and matched in the locking hole, so as to lock the multiple protective cylinders and prevent secondary use.

[0020] Preferably, the monitoring assembly capable of monitoring whether the blood backflows, which comprises a reflective photoelectric sensor arranged on the fixing block and a power supply for powering the reflective photoelectric sensor, the port needle is arranged inside the fixing block, the fixing block is provided with a mounting groove, the port needle passes through the mounting groove, the reflective photoelectric sensor is arranged in the mounting groove and monitors the liquid flowing through the port needle; the reflective photoelectric sensor comprises a set of transmitter and receiver used in cooperation, which can set different threshold ranges for determining whether the blood backflows.

[0021] By adopting the above technical scheme, the reflective photoelectric sensor can monitor the liquid flowing through the port needle, when the blood backflows, the reflective photoelectric sensor can monitor the color of the blood, thereby sending a warning signal, so that the medical staff can take corresponding rescue measures.

[0022] Preferably, the monitoring assembly comprises an indicator lamp arranged on the connecting plate, the indicator lamp is electrically connected with the reflective photoelectric sensor and the power supply, and is used for receiving the signal transmitted by the reflective photoelectric sensor.

[0023] By adopting the above technical scheme, when the blood backflow is monitored, the indicator can be lighted to remind the medical staff.

[0024] Preferably, the monitoring assembly further comprises a buzzer fixed on the connecting plate, the buzzer is connected with the reflective photoelectric sensor and the power supply, and is used for receiving the signal transmitted by the reflective photoelectric sensor.

[0025] By adopting the above technical scheme, when the blood backflow is monitored, the buzzer can ring to remind the medical staff again, so that they can quickly handle it.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. When the port needle is inserted into the port seat, the protective sleeve is retracted under the force, and the needle head of the port needle is leaked out of the port seat and connected with the port seat. When the port needle needs to be pulled out of the port seat, the inside of the protective sleeve automatically and quickly pops out under the action of the spiral spring, so that the protective sleeve completely covers the tip of the port needle, forms physical isolation, fundamentally prevents the needle tip from injuring the medical staff in the instant of disconnection; after the protective sleeve pops out, the locking member can lock adjacent protective sleeves and cannot be retracted again, so as to ensure that the medical product cannot be used again after use, and to ensure the safety of the waste process and prevent the cleaning personnel from being injured; 2. In the process of infusion, the reflective photoelectric sensor can continuously detect the change of the optical properties of the liquid flowing in the port needle. Once the blood backflow occurs, the red blood cells in the blood will change the reflection / scattering properties of the light, and the signal received by the sensor will change significantly. When the signal change exceeds the preset threshold 1, a small and low-power LED indicator light on the connector will emit slow flashing yellow light, indicating early blood backflow and attention should be paid. When the signal change exceeds a higher threshold 2, the LED indicator light changes to fast flashing red light, and a small buzzer is activated to emit a short and soft "tick-tock" sound, actively reminding the nurse to handle immediately; 3. The application combines the protective cylinder of mechanical structure and the monitoring module capable of early warning. The risk of needle stick injury is reduced to almost zero by the automatic ejection of the protective cylinder, effectively protecting the medical staff. The observation based on the experience of medical staff is changed into actual objective data monitoring, which can issue an early warning in the stage of trace blood that is difficult to detect by naked eye, and win valuable time for early intervention (such as timely flushing). Early detection and treatment of blood backflow can effectively reduce the incidence of catheter-related thrombosis, pipe blockage and infection, and improve patient safety and long-term patency of infusion port. The early warning system reduces the psychological and work burden of repeated inspection of nurses, making nursing work more precise and efficient. The intuitive warning is also convenient for health education of patients. The system automatically calibrates, reduces the difference of human judgment, and is conducive to the standardization of nursing operation. Further, the initial intention of the application design is achieved, and the desired technical effect of research and development is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the first embodiment of the application.

[0028] Figure 2 is a schematic diagram of the port needle of the first embodiment of the application.

[0029] Figure 3 is an exploded schematic diagram of the protective cylinder of the first embodiment of the application.

[0030] Figure 4 is a schematic diagram of the spiral spring and sliding groove of the first embodiment of the application.

[0031] Figure 5 is a schematic diagram of the sliding block and locking hole of the first embodiment of the application.

[0032] Figure 6 is a schematic diagram of the fixed part and telescopic part on the sliding block of the first embodiment of the application.

[0033] Figure 7 is a schematic diagram of the overall structure of the second embodiment of the application.

[0034] Figure 8is a schematic view of a protection plate according to an embodiment of the present application.

[0035] Reference signs: 1, port seat; 2, port needle; 21, fixed block; 22, infusion tube; 23, butterfly wing; 3, protection device; 31, connecting plate; 32, protection sleeve; 33, sliding clamping piece; 331, sliding groove; 332, sliding block; 3321, fixed part; 3322, telescopic part; 34, spiral spring; 35, locking hole; 36, abutting plug; 37, protection plate; 371, elastic plate; 372, clamping spring; 373, clamping ring; 374, electromagnet; 4, reflective photoelectric sensor; 5, power supply; 6, indicator light; 7, buzzer. DETAILED DESCRIPTION

[0036] The following will be described in detail with reference to the accompanying drawings. Figures 1-8 The present application will be described in further detail.

[0037] The embodiment of the present application discloses a needle-free infusion port needle system with anti-stabbing and blood backflow early warning functions.

[0038] Embodiment 1 With reference to Figure 1 and Figure 2 A needle-free infusion port needle system with anti-stabbing and blood backflow early warning functions comprises a port seat 1 of an infusion port implanted in a patient's body by surgery and a port needle 2 used in cooperation with the port seat 1, a fixed block 21 is arranged on the port needle 2 to fix the port needle 2 and facilitate a medical staff to hold the port needle 2, the port needle 2 and the fixed block 21 are arranged in an L shape, one end of the port needle 2 is arranged in the fixed block 21, an infusion tube 22 is connected to the other end of the fixed block 21 and communicates with the port needle 2, and a flexible butterfly wing 23 is further fixed on the fixed block 21 to facilitate the medical staff to hold the port needle 2, in use, the medical staff holds the butterfly wing 23, then inserts the port needle 2 into the port seat 1, and then delivers liquid into the port seat 1 through the infusion tube 22 and the port needle 2, and finally into the patient's blood vessel.

[0039] With reference to Figure 2 and Figure 3 A protection device 3 is arranged outside the port needle 2, which comprises a connecting plate 31 fixed on the fixed block 21, the connecting plate 31 is fixed on the end of the fixed block 21 close to the port needle 2, the horizontal direction of the connecting plate 31 is the same as the length direction of the fixed block 21, and the connecting plate 31 is a round plate structure; a protection sleeve assembly is arranged on the connecting plate 31, the protection sleeve assembly is a free telescopic structure and surrounds the port needle 2, in the process of inserting the port needle 2, the protection sleeve assembly is compressed to be compressed, so that the port needle 2 can be smoothly inserted into the port seat 1, when the port needle 2 is taken off from the port seat 1, the protection sleeve assembly automatically returns to the initial state and wraps the port needle 2, so as to prevent the needle tip from stabbing the medical staff in the process of taking off the needle.

[0040] The protective sleeve assembly comprises a plurality of protective sleeves 32 which are mutually sleeved and slide-fitted, the inner diameters of the sleeves of the plurality of protective sleeves 32 are different, thus the plurality of protective sleeves 32 are mutually sleeved, the protective sleeves 32 can be extended and contracted through the mutually sleeved protective sleeves 32, in use, the port needle 2 can be leaked out from the inside of the protective sleeve 32, so that the port needle 2 can be smoothly inserted into the port seat 1, after the port needle 2 is pulled out, the plurality of protective sleeves 32 are automatically extended to wrap and protect the port needle 2.

[0041] With reference to Figure 3 and Figure 4 A sliding clamping piece 33 is arranged between the two adjacent protective sleeves 32, which comprises a sliding groove 331 arranged on the inner wall of the previous protective sleeve 32 and a sliding block 332 fixed on the outer wall of the next protective sleeve 32, the sliding block 332 is fixed on the next protective sleeve 32 and close to the end of the previous protective sleeve 32, and the sliding block 332 is slide-fitted in the sliding groove 331; the sliding block 332 and the sliding groove 331 are arranged in multiple sets on the protective sleeve 32, the multiple sets of sliding blocks 332 and sliding grooves 331 are evenly arranged on the protective sleeve 32 in the circumferential direction, the multiple sets of sliding clamping pieces 33 can make the protective sleeve 32 more stable in extension and contraction, and prevent the two adjacent protective sleeves 32 from being disconnected. The sliding groove 331 is in a spiral structure on the inner wall of the protective sleeve 32, the two adjacent protective sleeves 32 can relatively rotate in the process of extension and contraction, so that the protective sleeve 32 can be extended by rotation, in use, the protective sleeve 32 can be retracted by being pressed down, and a unique feeling of rotating in can be brought in the process, which provides clear operation feedback for medical staff, and the extension and contraction by rotation is more stable in movement and smaller in noise in the process of extension and contraction. In addition, in the embodiment of the application, the parameters of the sliding groove 331 are designed, so that the protective sleeve 32 can be just extended out of the previous protective sleeve 32 after being rotated by 180 degrees.

[0042] With reference to Figure 4 and Figure 5The protective sleeve assembly further comprises a helical spring 34 arranged inside the plurality of protective sleeves, the upper end of the helical spring 34 is fixed with the connecting plate 31, and the lower end is fixed with the end of the lowermost protective sleeve 32 of the plurality of protective sleeves 32. Under the action of the helical spring 34, the plurality of protective sleeves 32 are in an elongated state. When it is necessary to prick the patient, the port needle 2 is aligned with the port seat 1 and inserted downward, and during the pricking process, the plurality of protective sleeves 32 are compressed back into the last protective sleeve 32, and then the port needle 2 is fixed to the patient's body. Further, the end of each protective sleeve 32 away from the connecting plate 31 is provided with a plug-in hole (not shown in the figure), and the plug-in holes on each protective sleeve 32 can be aligned with each other after rotation and retraction. When the plurality of protective sleeves 32 are compressed and retracted to the correct position, the plurality of plug-in holes are aligned, and then the medical staff inserts the plug (not shown in the figure) arranged therein into the plug-in hole, or rotates the clamping plate (not shown in the figure) arranged at the end face of the barrel of the uppermost protective sleeve 32. When the plurality of protective sleeves 32 are fully retracted, the clamping plate can be rotated to the barrel of the plurality of protective sleeves 32, so that the plurality of protective sleeves 32 can be blocked and prevented from extending from the uppermost protective sleeve 32; during the infusion process of the patient, the helical spring 34 always has elastic force, so that the protective sleeve 32 is pressed tightly to the patient's body, and the plurality of protective sleeves 32 always have the kinetic energy of extending outward, which is not conducive to the infusion of the patient. Therefore, the plug and the plug-in hole and the clamping plate arranged in cooperation can lock the retracted protective sleeve 32, so that the patient can normally infuse.

[0043] Referring to Figure 4 and Figure 6The protective sleeve assembly further comprises locking members arranged on two adjacent protective sleeves 32, which can lock the protective sleeves 32 after the protective sleeves 32 are extended, so as to prevent the multiple protective sleeves 32 from being retracted. The locking member comprises a locking hole 35 arranged on the protective sleeve 32 and penetrating through the protective sleeve 32, which is located on the sliding groove 331 and close to the end of the other protective sleeve 32. The sliding block 332 is of a telescopic structure, which comprises a fixed part 3321, a telescopic part 3322 and an elastic member arranged in the fixed part 3321. The telescopic part 3322 can be extended outwards by the elastic member. During the sliding of the sliding block 332 in the sliding groove 331, the telescopic part 3322 is compressed and retracted into the fixed part 3321. A flexible abutting plug 36 is inserted and matched with the position of the locking hole 35 on the outer wall of the protective sleeve 32. The abutting plug 36 is matched and removed in the locking hole 35. When the patient needs to be pricked, the protective sleeve 32 is first pressed down, so that the sliding block 332 is separated from the position of the locking hole 35. Then the abutting plug 36 is removed, and the protective sleeve 32 is continuously pressed down until the port needle 2 is inserted in place. When the port needle 2 is pulled out, the protective sleeve 32 is quickly extended under the action of the coil spring 34. When the protective sleeve 32 is extended to the specified position, the telescopic part 3322 is inserted and matched into the locking hole 35 under the action of the elastic member, so as to lock the multiple protective sleeves 32 and prevent them from being used again.

[0044] With reference to the foregoing Figure 1 and Figure 2 , the needle-free infusion port needle system with the anti-stabbing and blood backflow warning function further comprises a monitoring assembly for monitoring whether the blood backflows. The monitoring assembly can monitor whether the blood in the patient's body flows outwards during the infusion process or the needle pulling process in real time. The monitoring assembly comprises a reflective photoelectric sensor 4 arranged on the fixed block 21 and a power supply 5 for supplying power to the whole monitoring assembly. The reflective photoelectric sensor 4 has the advantages of miniaturization and good biocompatibility. An installation groove is arranged on the fixed block 21, and the port needle 2 can pass through the installation groove. The reflective photoelectric sensor 4 is installed and matched in the installation groove and monitors the liquid flowing through the inside of the port needle 2. In the embodiment, a disposable button battery is used as the power supply for the sensor and the system. The power supply can support the port needle 2 and the port seat 1 to be connected and matched for use within a specified period (for example, 7 days). The reflective photoelectric sensor 4 comprises a light emitter and a receiver. The emitter can emit light of a specific wavelength (for example, green light, which is sensitive to oxyhemoglobin). After the emitted light irradiates the liquid flowing through the inside of the port needle 2, the reflected signal is sent to the receiver. According to the set value of the reflective sensor, it is determined whether the blood backflows in the inside of the port needle 2.

[0045] As a preferred, the section of the port needle 2 where the reflective photoelectric sensor 4 is installed is made of transparent or semi-transparent material (such as medical transparent polymer), and the emitter and receiver of the reflective photoelectric sensor are arranged so that the light emitted by them can pass through the transparent tube wall to irradiate the internal liquid and receive the light reflected from the liquid.

[0046] The monitoring assembly further comprises an indicator light 6 and a buzzer 7 arranged on the connecting plate 31, which are electrically connected with the reflective photoelectric sensor 4 and the power supply 5. When the blood backflow is detected by the reflective photoelectric sensor 4, the indicator light 6 can be lit and the buzzer 7 can be sounded. The reflective photoelectric sensor 4 can be set with different threshold values, and different levels of early warning can be realized by setting different threshold values. When the signal change exceeds the preset threshold value 1, a micro and low-power LED indicator light 6 on the connector will emit slow flashing yellow light, prompting early blood backflow and attention should be paid. When the signal change exceeds a higher threshold value 2, the LED indicator light 6 changes to fast flashing red light, and a micro buzzer 7 is activated to emit a short and soft "tick" sound, actively reminding the nurse to immediately handle it.

[0047] As a preferred, the reflective photoelectric sensor 4 is connected with a microprocessor, and the microprocessor pre-stores a reference signal range corresponding to physiological saline, a first threshold signal range corresponding to early blood backflow, and a second threshold signal range corresponding to obvious blood backflow. The microprocessor compares the real-time signal received by the sensor with the preset range, and controls the indicator light 6 and the buzzer 7 to respond accordingly.

[0048] The implementation principle of the needle-free infusion port needle system with the anti-stabbing and blood backflow early warning function in the embodiment is as follows: during the infusion process of a patient, a medical staff inserts the port needle 2 into the port seat 1, the protective barrels 32 arranged on the port needle 2 can always maintain an elongated state under the action of the helical spring 34, and when the needle is inserted, they can be compressed and the protective barrels 32 are retracted. After the retraction, the protective barrels 32 are fixed, so as to avoid automatic elongation during the delivery process. After the infusion is completed, the plug is removed or the plug plate is rotated, and under the action of the helical spring 34, the plurality of protective barrels 32 are all extended. After the extension is completed, the locking member can lock and fix the adjacent protective barrels 32, so as to prevent the protective barrels 32 from being retracted again and avoid the secondary use of the port needle 2 after use.

[0049] Embodiment 2 Reference Figure 7 and Figure 8The difference between the embodiment 2 and the embodiment 1 of the present application is that the protection device 3 comprises a plurality of protection plates 37 rotatably arranged on the connecting plate 31, the plurality of protection plates 37 surround the ring structure, and the plurality of protection plates 37 can wrap the port needle 2, the upper end of the protection plate 37 is hingedly arranged with the connecting plate 31, so that the plurality of protection plates 37 can be opened outward and the port needle 2 is exposed; the protection plate 37 is made of flexible material, and the outwardly curved elastic plate 371 is fixed on the outer surface of the protection plate 37, so that the protection plate 37 can maintain the outward rotating force, the hoop spring 372 is sleeved outside the plurality of protection plates 37, the upper end of the hoop spring 372 is fixed with the connecting plate 31, and the lower end is fixed with the hoop ring 373, the hoop ring 373 is sleeved outside the plurality of protection plates 37, and the hoop spring 372 is in a free state, the hoop ring 373 can be located at the lower end of the protection plate 37, the plurality of protection plates 37 can be hooped by the hoop spring 372 arranged, and the protection plate 37 is prevented from being unfolded outward; when the port needle 2 is inserted into the port seat 1, the medical staff pulls the hoop ring 373 upward, so that the hoop spring 372 is contracted, the electromagnet 374 is arranged on the hoop ring 373 and the connecting plate 31, the power supply 5 can supply power to the electromagnet 374, when the electromagnet 374 is electrified, the electromagnet 374 can be attracted to each other, when the hoop ring 373 is close to the connecting plate 31 upward, the hoop ring 373 can be attracted to the connecting plate 31; after the infusion is completed, the medical staff pulls out the port needle 2 from the port seat 1, the electromagnet 374 is de-energized, and the plurality of protection plates 37 can be quickly folded under the action of the hoop spring 372, so as to protect the port needle 2 and prevent the port needle 2 from injuring the medical staff.

[0050] In necessary cases, as known by those skilled in the art, the adjustment control mode involved in the present application can use conventional manual or automatic mode, and the automatic mode can be combined with built-in / external software, which can be common software with corresponding functions such as timing reminder and Bluetooth communication, or can be independently developed special software (or applet); at the same time, the above-mentioned embodiments can also be additionally provided with other control mechanisms, driving mechanisms, connecting structures, power supplies and / or auxiliary structures, etc. to perform necessary operations and controls, and the structures do not interfere with each other, and those skilled in the art can implement them.

[0051] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A needleless infusion port system with anti-puncture wound and blood backflow warning functions, characterized in that: The device includes an implantable port (1) inserted into the patient's body and an interstitial needle (2) used for injection in conjunction with the port (1). The interstitial needle (2) is provided with a fixing block (21) for fixing it. An infusion tube (22) communicating with the interstitial needle (2) is provided on the fixing block (21), and a butterfly wing (23) is provided on the fixing block (21) for easy handling by medical staff. The interstitial needle (2) is provided with a protective device (3) on the outside. The protective device (3) includes a connecting plate (31) fixed on the fixing block (21) and a protective sleeve assembly fixed on the connecting plate (31). The protective sleeve assembly can be freely extended and retracted and surrounds the interstitial needle (2).

2. The needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 1, characterized in that: The protective sleeve assembly includes a plurality of protective sleeves (32) that slide and engage with each other, and the plurality of protective sleeves (32) are nested together.

3. The needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 1, characterized in that: The protective sleeve assembly also includes a sliding snap-fit ​​member (33) disposed between two adjacent protective sleeves (32), which includes a sliding groove (331) formed on the inner wall of the previous protective sleeve (32) and a sliding block (332) fixed on the outer wall of the next protective sleeve (32), wherein the sliding block (332) is slidably snapped into the sliding groove (331).

4. The needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 3, characterized in that: The sliding snap-fit ​​component (33) is provided with multiple sets on two adjacent protective cylinders (32), and the multiple sets of cooperating sliding grooves (331) and sliding blocks (332) are evenly arranged circumferentially on the two protective cylinders (32).

5. A needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 3, characterized in that: The sliding groove (331) has a spiral structure on the inner wall of the protective cylinder (32), and two adjacent protective cylinders (32) can rotate relative to each other and slide together.

6. The needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 1, characterized in that: The protective sleeve assembly also includes a helical spring (34) disposed inside a plurality of protective sleeves (32), the upper end of the helical spring (34) being fixed to the connecting plate (31) and the lower end being fixed to the end of the protective sleeve (32) away from the connecting plate (31).

7. A needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 3, characterized in that: The protective sleeve assembly also includes a locking member disposed on two adjacent protective sleeves (32), which includes a locking hole (35) opened on the protective sleeve (32) and penetrating the protective sleeve (32). The locking hole (35) is located at the position of the sliding groove (331) near the end of the other protective sleeve (32). The sliding block (332) is a telescopic structure, which includes a fixed part (3321) and a telescopic part (3322). The telescopic part (3322) can be inserted into the locking hole (35).

8. The needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 1, characterized in that: It also includes a monitoring component capable of monitoring whether blood is flowing back, which includes a reflective photoelectric sensor (4) mounted on a fixed block (21) and a power supply (5) for powering the reflective photoelectric sensor (4). The port needle (2) is inserted inside the fixed block (21), and a mounting groove is provided on the fixed block (21). The port needle (2) passes through the mounting groove. The reflective photoelectric sensor (4) is mounted in the mounting groove and monitors the liquid flowing inside the port needle (2). The reflective photoelectric sensor (4) includes a set of transmitter and receiver used in conjunction, which can be set with different threshold ranges to determine whether blood is flowing back.

9. A needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 8, characterized in that: The monitoring component includes an indicator light (6) mounted on a connecting plate (31). The indicator light (6) is electrically connected to a reflective photoelectric sensor (4) and a power supply (5) to receive signals transmitted from the reflective photoelectric sensor (4).

10. A needleless infusion port system with anti-puncture and blood backflow warning functions according to claim 8, characterized in that: The monitoring component also includes a buzzer (7) fixed on the connecting plate (31), which is connected to the reflective photoelectric sensor (4) and the power supply (5) to receive the signal transmitted by the reflective photoelectric sensor (4).

Images