CN210811025U - A ventriculo-peritoneal cerebrospinal fluid shunt flow detection device - Google Patents

Abstract

The utility model relates to a ventricle-peritoneal cerebrospinal fluid shunt tube flow detection device. The detection device comprises a liquid storage bag, the back of the liquid storage bag is made of hard medical material with a certain thickness, and the front of the liquid storage bag is made of soft medical material. Material, the upper end and the lower end of the liquid storage bag are respectively provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are respectively wrapped with a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet and the liquid inlet pipe are sealed without leakage. There is no leakage between the liquid outlet and the liquid outlet pipe; the middle part or the upper middle part of the front part of the liquid storage bag is provided with a puncture-resistant puncture part that can automatically close the puncture hole. The utility model can detect the shunt flow of the ventricle-peritoneal cerebrospinal fluid shunt without affecting the drainage, provides a judgment basis for the diagnosis and treatment of doctors, adjusts the pressure of the shunt tube of the patient in time through the detection of the shunt flow, and reduces postoperative complications , alleviate the pain of patients and improve the treatment effect.

Description

A ventriculo-peritoneal cerebrospinal fluid shunt flow detection device

technical field

The utility model relates to the field of medical equipment, in particular to a ventricle-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device.

Background technique

Ventricular-peritoneal shunt is the most commonly used method for the treatment of hydrocephalus. The shunt needs to drain the cerebrospinal fluid from the ventricle end to the abdominal cavity for absorption through the abdominal cavity. Ventricular pressure, cerebrospinal fluid secretion, absorption of cerebrospinal fluid, intra-abdominal pressure, and the shunt device used will all affect the shunt flow. Excessive shunt flow can lead to fissure-like ventricles and low intracranial pressure, and insufficient shunt can cause symptoms of intracranial hypertension. Shunt device obstruction is also a common postoperative complication. At present, the shunt flow mainly relies on the valve on the shunt device for pressure control. The principle is that when the pressure in the ventricle is higher than the valve pressure, the cerebrospinal fluid flows to the abdominal cavity. Some valves can adjust the pressure according to postoperative clinical manifestations. However, in clinical practice, the flow of cerebrospinal fluid cannot be completely controlled by the shunt valve due to the siphon effect caused by the change of the patient's body position, resulting in an uncertain shunt flow. The detection of the shunt flow of CSF is of great significance for the adjustment of the shunt valve after shunt surgery, the detection of postoperative complications, and clinical research.

SUMMARY OF THE INVENTION

In view of the above defects, the present utility model provides a ventriculo-peritoneal cerebrospinal fluid shunt shunt flow detection device, which can detect the shunt flow of the ventricle-peritoneal shunt tube without affecting the drainage, so as to provide a judgment basis for the diagnosis and treatment of doctors, Through the detection of the shunt flow, the pressure of the patient's shunt can be adjusted in time, so as to reduce postoperative complications, relieve the pain of the patient, and improve the treatment effect.

The purpose of the present utility model and the solution to its technical problems are achieved by adopting the following technical solutions. A ventriculo-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device proposed according to the utility model includes a liquid storage bag, the back of the liquid storage bag is made of hard medical material with a certain thickness, and the front of the liquid storage bag is made of soft medical material The upper end and the lower end of the liquid storage bag are respectively provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are respectively wrapped with a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet and the liquid inlet pipe are sealed without seepage The liquid outlet and the liquid outlet pipe are sealed without leakage; the middle part or the upper middle part of the front part of the liquid storage bag is provided with a puncture-resistant part that can automatically close the puncture hole.

Further, the storage volume of the liquid storage bag is 3-10ml, the diameter d of the bottom surface of the puncture part is 0.7-1.5cm, the thickness of the puncture part is 1-3mm, and the thickness of the back of the liquid storage bag is 1-2mm.

Further, the volume of the liquid storage bag is 5ml, the diameter d of the bottom surface of the puncture part is 1cm, the thickness of the puncture part is 2mm, and the thickness of the back of the liquid storage bag is 2mm.

Further, the liquid inlet pipe and the liquid outlet pipe are respectively divided into a plurality of branch pipelines, and each branch pipeline is provided with a plurality of uniform or non-uniformly arranged side holes.

Further, the puncture part is protruded from the front part of the liquid storage bag.

Further, a circle of X-ray-tight inductive elements is also arranged on the outer periphery of the puncturing portion.

Further, the material of the sensing element is one of iron, lead, gold, and platinum.

Further, both the liquid inlet pipe and the liquid outlet pipe are provided with raised parts for improving the connection reliability and tightness of the cerebrospinal fluid shunt pipe and the liquid inlet pipe and the liquid outlet pipe.

The utility model has the following beneficial effects:

The utility model is simple in structure and small in volume, can detect the shunt flow of the ventricle-peritoneal shunt tube at any time without affecting the drainage, provides a judgment basis for the diagnosis and treatment of doctors, and adjusts the flow rate of the shunt tube of the patient in time through the detection of the shunt flow. pressure, reduce postoperative complications, relieve patient pain, and improve treatment effect. The detection method used is to inject 0.5ml of 10mg/ml sodium valproate solution into the storage bag, the total amount of sodium valproate at one time is 5mg, and the water solubility of sodium valproate is good, and the detection is convenient. Many hospitals have detection methods. The condition is not high, the cost is not high, and the key is that it is harmless to the human body, which brings great convenience to the detection of cerebrospinal fluid shunt flow.

Description of drawings

Fig. 1 is the schematic diagram when the utility model is used together with existing shunt pipe and shunt valve;

Fig. 2 is the front view of example one of the present utility model;

Fig. 3 is the right side view of Fig. 2;

Fig. 4 is the front view of the second example of the present utility model;

FIG. 5 is a right side view of FIG. 4 .

1: Reservoir, 1-1: Back of Reservoir, 1-2 Front of Reservoir, 2: Inlet tube, 3: Outlet tube,

4: puncture part, 5: shunt valve, 6: upper half shunt tube, 7: lower half shunt tube,

8: Sensing element, 9: Sensing bag, 10: Branch pipe, 11: Side hole, 12: Raised part,

13: Insertion guide surface, 14: Upper half shunt port 15: Fixing hole

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following in conjunction with the accompanying drawings and preferred embodiments, a ventriculo-peritoneal cerebrospinal fluid shunt flow detection device proposed by the present invention is carried out. Detailed description.

The ventriculo-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device of the present invention comprises a liquid storage bag 1, the back of the liquid storage bag 1-1 is a rigid medical material with a certain thickness, which is not easy to be punctured by a needle and is harmless to the human body. Will not cause human discomfort. The front part 1-2 of the liquid storage bag is made of soft medical material, which is also harmless to the human body and will not cause discomfort to the human body. The projected area of the front of the reservoir should be slightly smaller than the area of the back, as shown in Figure 2. The upper and lower ends of the liquid storage bag are respectively provided with a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are respectively wrapped with a liquid inlet pipe 2 and a liquid outlet pipe 3, and the liquid inlet and the liquid inlet pipe are sealed without leakage. There is no leakage between the liquid outlet and the liquid outlet pipe. A puncture part 4 is provided in the middle part of the front part of the liquid storage bag (as shown in Figure 2 and Figure 3) or in the upper part (as shown in Figure 4 and Figure 5). , and after the puncture needle is pulled out, the material of the puncture part can be automatically closed and the liquid in the liquid storage bag can be prevented from leaking out.

The utility model is used for matching with the existing cerebrospinal fluid shunt tube and the shunt valve matched with the shunt tube. As shown in Figure 1, in the cerebrospinal fluid shunt operation, the upper end of the shunt tube is placed in the patient's ventricle, and the lower end is placed in the patient's abdomen. , the cerebrospinal fluid of the patient's ventricle is drained to the abdominal cavity through the shunt tube to be absorbed by the patient's body. In the prior art, the shunt tube is equipped with a shunt valve 5 near the upper end, and the shunt valve is usually embedded behind the patient's ear. Adjusted by diverter valve. Generally, a shunt flow of 200-300ml a day for a patient with cerebrospinal fluid is an ideal situation. However, there is no detection device or method for adjusting the shunt flow size at present. Patients with postoperative complications and other conditions. When the utility model is used in combination with a shunt tube and a shunt valve, the device of the present invention is embedded under the skin of the patient's chest, the corresponding position of the original shunt tube is cut, and the upper half of the shunt tube 6 is cut with the utility model. The liquid inlet pipe of the device is plugged and connected, and the lower half of the shunt pipe 7 at the cut portion is plugged and connected to the liquid outlet pipe of the device of the present invention, as shown in FIG. 1 . The whole shunt tube is embedded in the human body, one end is connected to the ventricle, the other end is connected to the abdominal cavity, the shunt valve is embedded under the skin behind the ear, and the detection device of the present invention is embedded under the skin of the chest (surgical implantation is required, but the implantation is as follows: routine surgery in the medical community).

The method of using the device of the utility model to detect the shunt flow is as follows: use an injection needle to pierce the puncture part through the skin of the human chest and inject 0.5ml of 10mg/ml sodium valproate solution into the liquid storage bag, and record the injection of sodium valproate. At time t ₁ after the solution, the initial concentration of sodium valproate in the storage bag at t ₁ is C ₁ =(0.5ml×10mg/ml)/V ₀ , where V ₀ is the volume of the storage bag, unit: ml . Due to the continuous flow of cerebrospinal fluid, part of the sodium valproate is excreted into the abdominal cavity with the cerebrospinal fluid, so the concentration of sodium valproate in the reservoir gradually decreases with time. Wait until time _t2 , use an injection needle to pierce the puncture part through the human chest skin to extract 0.5ml of the liquid in the storage bag, and detect the concentration _C2 of sodium valproate in the 0.5ml solution extracted at _t2 , according to formula V ₁ = -V ₀ ×ln(C ₂ /C ₁ ) calculates the divided flow rate V ₁ in the time period of (t ₂ -t ₁ ). Among them, V ₀ refers to the volume of the storage bag, unit: ml, C ₁ is the initial concentration of sodium valproate in the storage bag at time t ₁ , unit: mg/ml, C ₂ is 0.5ml drawn out at time t ₂ Test concentration of sodium valproate in solution, unit: mg/ml. Convert V ₁ into a 24-hour flow V ₂₄ and compare it with an ideal flow of 200-300ml for 24 hours a day. If the comparison result V ₂₄ is too large or too small, the shunt valve is controlled to adjust the shunt flow of the shunt pipe.

In the above-mentioned method, since the liquid storage bag needs to be embedded in the human body, if the volume is too large, it will cause great damage to the patient and make the human body uncomfortable, and _if the volume is too small, the detection error will be large. It is better to be 3-10ml. After repeated in vitro experiments, the volume V ₀ of the liquid storage bag is preferably 5ml, and the error is already small at this time.

Due to the good solubility of sodium valproate in water, the detection is convenient (many hospitals have equipment for detecting sodium valproate), and the cost is not high. as the detection substance. And the mass of sodium valproate in 0.5ml 10mg/ml sodium valproate solution is 5mg, the amount is very small and completely harmless to human body.

Similarly, since the liquid storage bag needs to be embedded in the human body, in order to facilitate the medical staff to accurately pierce the puncture part, the puncture part is designed as a convex structure, as shown in Figures 3 and 5, the puncture part is more Protruding, it is convenient for medical staff to sense the position of the puncture part by hand to perform puncture. The diameter d of the bottom surface of the puncture portion may be 0.7-1.5 cm, preferably 1 cm.

Further, a circle of spherical or hemispherical or elliptical sensing elements 8 that are opaque to X-rays can be arranged on the periphery of the puncture part. Light detection determines the position of the puncture part for accurate puncture. The sensing element can be made of iron, lead, gold, platinum and other materials that are opaque to X-rays. The sensing element can be encapsulated in the sensing bag 9, and the material of the outer surface of the sensing bag is soft medical material, which will not cause discomfort to the human body and is harmless to the human body. The material of the outer surface of the sensing bag and the material of the front of the storage bag may be the same or different.

Further, the puncture portion may have a certain thickness, such as 1-3 mm thick, and is made of silicone rubber. After the injection needle is punctured and pulled out, the puncture hole can be automatically closed to prevent the liquid in the liquid storage bag from leaking out. In order to ensure the puncture resistance of the puncture part and reduce the injection error, the syringe preferably adopts a thin needle, which can be a 1ml or 2ml syringe (needle specifications are 0.45mm or 0.5/0.6mm respectively). In order to avoid puncturing the back of the liquid storage bag during puncturing, the back of the liquid storage bag is made of a rigid medical material with a certain thickness, such as a high molecular weight polyethylene material. The needle will not easily puncture the back of the reservoir. The thickness of the back of the liquid storage bag can be 1-2 mm, and the corners of the back of the liquid storage bag are round and smooth, and it will not cause discomfort when embedded under the human skin.

In order to ensure that the sodium valproate solution is quickly and evenly distributed in the liquid storage bag after being injected into the liquid storage bag, and reduces the measurement error, the liquid inlet pipe and the liquid outlet pipe are set to a tree-like structure, as shown in Figure 2 and Figure 4, The liquid inlet pipe and the liquid outlet pipe are respectively divided into a plurality of branch pipes 10, and each branch pipe is provided with a plurality of side holes 11. The side holes can be arranged in an orderly manner or randomly arranged in the branch pipes. On the way, cerebrospinal fluid not only enters or exits from the inlet and outlet of the branch pipeline, but also enters or exits from the side hole. When the sodium valproate solution is injected, this structure can speed up the flow of the liquid in the storage bag. It has a certain promoting effect on the rapid and uniform distribution of sodium valproate in the reservoir. The side holes shown in Figures 1 to 5 are evenly arranged, and each branch pipeline can be arranged with 2 to 6 rows of side holes along the circumference, preferably 4 rows.

Preferably, in order to further speed up the uniform distribution of the sodium valproate solution in the liquid storage bag, when the injection needle is punctured, the puncture part can be selected as the puncture point slightly upward, or the puncture part can be set on the upper part of the liquid storage bag, as shown in the figure 4 and Figure 5.

In order to improve the reliability and tightness of the connection between the shunt pipe and the liquid inlet pipe and the liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe of the present invention are provided with spherical convex parts 12, and the liquid inlet pipe in FIG. 2 is For example, insert the liquid inlet pipe into the shunt pipe, so that the upper part of the shunt pipe port 14 is located below the spherical convex part on the liquid inlet pipe. After inserting, the shunt pipe is not easy to fall off the liquid inlet pipe. In order to make intubation easier, an inclined surface is provided at the inlet of the liquid inlet pipe as the insertion guide surface 13, and the insertion guide surface extends from the inlet of the liquid inlet pipe to the raised part to facilitate intubation operation. The structure of the liquid outlet pipe is the same as that of the liquid inlet pipe, and corresponding raised parts and insertion guide surfaces are also provided, as shown in FIG. 2 .

Further, the liquid inlet pipe and the liquid outlet pipe can also be respectively arranged at the upper or lower part of the side surface of the liquid storage bag, and their positions are not limited, but are preferably respectively arranged at the upper and lower ends of the liquid storage bag. The liquid inlet pipe, the liquid outlet pipe and the front and back materials of the liquid storage bag are integrally pressed and formed during production to ensure the sealing performance of the connection between the liquid inlet pipe, the liquid outlet pipe and the liquid storage bag, no liquid leakage, and the entire liquid storage bag is sealed Good, not oozing when used. The four corners of the back of the liquid storage bag are also provided with fixing holes 15 for fixing the utility model in the human body.

Further, when the cerebrospinal fluid flow is detected, the time period (t ₂ -t ₁ ) may be 1-24 hours.

Example 1:

Assuming that the volume of the storage bag is V ₀ =5ml, 0.5ml of 10mg/ml sodium valproate solution is injected into the storage bag at 8:00 in the morning, then the sodium valproate in the storage bag after the sodium valproate is injected The concentration is C ₁ =(0.5ml×10mg/ml)/V ₀ =(0.5ml×10mg/ml)/5ml=1mg/ml. At 9:00 am, 0.5 ml of liquid was withdrawn from the reservoir to detect the concentration of sodium valproate as C ₂ = 0.1 mg/ml, then the cerebrospinal fluid shunt flow V ₁ within 1 hour (t ₂ -t ₁ = 1 h) was determined according to formula V ₁ =-V ₀ ×ln(C ₂ /C ₁ ) is calculated as: V ₁ =-5ml×ln(0.1mg/ml/1mg/ml)=11.5ml, and V ₁ is converted into a 24-hour divided flow rate as V ₂₄ = 11.5ml × 24 = 276ml, the ideal shunt flow of cerebrospinal fluid in 24 hours a day is 200-300ml, and V ₂₄ is a normal value compared with the ideal shunt flow, indicating that the patient's cerebrospinal fluid shunt volume is normal at this time, and there is no need to adjust the shunt flow.

Example 2:

Assuming that the volume of the storage bag is V ₀ =5ml, 0.5ml of 10mg/ml sodium valproate solution is injected into the storage bag at 8:00 in the morning, then the sodium valproate in the storage bag after the sodium valproate is injected The concentration is C ₁ =(0.5ml×10mg/ml)/V ₀ =(0.5ml×10mg/ml)/5ml=1mg/ml. At 9:00 am, 0.5 ml of liquid was withdrawn from the reservoir to detect the concentration of sodium valproate as C ₂ = 0.3 mg/ml, then the cerebrospinal fluid shunt flow V ₁ within 1 hour (t ₂ -t ₁ = 1 h) was calculated according to formula V ₁ =-V ₀ ×ln(C ₂ /C ₁ ) is calculated as: V ₁ =-5ml×ln(0.3mg/ml/1mg/ml)=6ml, and V ₁ is converted into a 24-hour divided flow rate as V ₂₄ =6ml×24=144ml, the ideal shunt flow of cerebrospinal fluid in 24 hours a day is 200-300ml, and V ₂₄ is too small compared with the ideal shunt flow, indicating that the patient’s cerebrospinal fluid shunt flow is too small at this time, and the shunt is controlled by the shunt valve. The split flow of the tube is adjusted.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Any person who is familiar with this profession, without departing from the scope of the technical solution of the present utility model, utilizes the above-mentioned technical content The embodiments with some changes or modifications still fall within the scope of the technical solution of the present invention.

Claims (8)

1. a ventricle-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device, is characterized in that comprising a liquid storage bag, the back of the liquid storage bag is a rigid medical material with a certain thickness, and the liquid storage bag front part is a soft medical material, The upper end and the lower end of the liquid storage bag are respectively provided with a liquid inlet and a liquid outlet. The liquid outlet and the liquid outlet pipe are sealed without leakage; the middle part or the upper middle part of the front part of the liquid storage bag is provided with a puncture-resistant part that can automatically close the puncture hole. 2. The ventriculo-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device as claimed in claim 1, wherein the accommodating volume of the liquid storage bag is 3-10ml, the diameter d of the bottom surface of the puncture part is 0.7-1.5cm, and the thickness of the puncture part is 0.7-1.5cm. It is 1-3mm, and the thickness of the back of the reservoir is 1-2mm. 3. ventriculo-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device as claimed in claim 1, is characterized in that the volume of the fluid storage bag is 5ml, the diameter d of the bottom surface of the puncture portion is 1cm, the thickness of the puncture portion is 2mm, the fluid storage bag The thickness of the back is 2mm. 4. The ventriculo-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device as claimed in claim 1, wherein the liquid inlet pipe and the liquid outlet pipe are respectively divided with a plurality of branch pipelines, and each branch pipeline is provided with a plurality of branch pipelines. uniform or non-uniform arrangement of side holes. 5 . The ventriculo-peritoneal cerebrospinal fluid shunt tube shunt flow detection device according to claim 1 , wherein the puncture part is more protruding than the front part of the fluid storage sac. 6 . 6 . The ventriculo-peritoneal cerebrospinal fluid shunt tube shunt flow detection device according to claim 1 , characterized in that a circle of X-ray opaque sensing elements are further arranged on the periphery of the puncture part. 7 . 7 . The ventriculo-peritoneal cerebrospinal fluid shunt tube shunt flow detection device according to claim 6 , wherein the sensing element is made of one of iron, lead, gold, and platinum. 8 . 8. the ventriculo-peritoneal cerebrospinal fluid shunt pipe shunt flow detection device as claimed in claim 1, is characterized in that the liquid inlet pipe and the liquid outlet pipe are all provided with for improving the connection reliability of the cerebrospinal fluid shunt pipe and the liquid inlet pipe and the liquid outlet pipe and sealing raised parts.

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