Ommaya sac drainage fixing device through subscalp puncture

Abstract

The invention discloses a drainage fixing device for an Oma sac through subscalp puncture, and belongs to the technical field of medical instruments. The device comprises a fixed box body, the top of the fixed box body is provided with a bolt, the bottom is provided with a needle body fixing ring and coaxially provided with a puncture needle, a sealing ring is arranged between the puncture needle and the needle body fixing ring, and the bolt can push the puncture needle to move up and down to adjust the puncture depth; a water absorption ring is arranged at the bottom end of the needle body fixing ring around the puncture needle; a conduit is arranged at the bottom of the fixed box body and is connected with the water absorption ring and the lateral collection cavity; an anti-seepage ring and a skin cushion layer are arranged at the bottom of the fixed box body, and the side edge of the fixed box body is connected with a fixed belt with medical pressure-sensitive adhesive; a needle inlet channel is formed in the axis of the bolt and blocked by a heparin cap. Stable fixation and depth adjustment of the puncture needle can be achieved, the water absorption ring is used for absorbing, expanding and sealing a puncture gap, the catheter and the collecting cavity are combined for managing seepage, infection is effectively prevented, repeated dosing can be achieved, repeated puncture is not needed, and pain of a patient is relieved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a transscalp puncture Ommaya sac drainage and fixation device. Background Technology

[0002] The Ommaya reservoir, a core drainage device in neurosurgery, is widely used postoperatively for conditions such as intraventricular hemorrhage, hydrocephalus, and intracranial infection. It consists of a flat reservoir embedded under the scalp and a drainage tube inserted into the ventricle. Currently, Ommaya reservoir drainage in clinical practice often employs a method of "modified infusion needle with suture fixation," which has significant drawbacks: needle fixation relies heavily on the surgeon's experience, and inconsistent techniques lead to a high rate of dislodgement, requiring repeated punctures for adjustment; some patients require secondary punctures for medication, causing additional pain. Furthermore, a small gap exists between the needle and the scalp, allowing fluid from the reservoir or scalp tissue to easily leak out and accumulate around the puncture site, posing a risk of infection. Summary of the Invention

[0003] To address the aforementioned issues, this invention proposes a subscalp puncture Ommaya sac drainage and fixation device that can stably fix the puncture needle, effectively seal the puncture gap, prevent the accumulation of exudate, and reduce repeated puncture damage.

[0004] To achieve the above-mentioned technical objectives, the present invention is implemented through the following technical solution:

[0005] A subcutaneous puncture Ommaya sac drainage and fixation device mainly consists of a fixation box and a puncture needle inside. The fixation box is circular and hollow, and a drainage tube is connected to its side. A threaded hole is opened at the center of the top of the fixation box and a bolt is installed thereon.

[0006] The fixed box has an opening at its bottom center and an inwardly recessed needle fixing ring installed thereon. A puncture needle is coaxially installed at the center of the needle fixing ring. A sealing ring is installed between the puncture needle and the needle fixing ring. The puncture needle can move up and down within the needle fixing ring and the sealing ring keeps the inside of the fixed box sealed. The top of the upper half of the puncture needle contacts the bolt and its outer diameter is larger than that of the lower half. The puncture needle is through the top and bottom and has a side hole on its upper half side. The lower half of the puncture needle extends out of the bottom of the fixed box for puncturing the Ommaya sac. The bolt can be used to control the length of the puncture needle extension, which can be adjusted according to the depth required.

[0007] The bottom surface of the needle fixing ring is provided with a water-absorbing ring that surrounds the puncture needle. The water-absorbing ring is filled with water-absorbing resin. After the puncture needle punctures the scalp, the water-absorbing ring can absorb the exudate and expand itself to fill the gap between the needle fixing ring and the scalp, thereby achieving an active seal. The bottom of the fixing roller box is provided with a conduit. One end of the conduit extends into the inside of the water-absorbing ring corresponding to the puncture needle, and the other end is connected to the collection chamber installed on the side of the fixing box. The collection chamber is filled with some water-absorbing resin, and excess exudate can be guided into the collection chamber through the conduit.

[0008] Furthermore, the bottom of the fixing box body is provided with a downward protruding anti-leakage ring at the connection between the bottom of the fixing box body and the needle fixing ring. The anti-leakage ring is made of silicone and can fit with the scalp to prevent internal leakage. The bottom of the fixing box body outside the anti-leakage ring is covered with a skin pad layer, which can adaptively contact the scalp and adapt to the head contours of different patients.

[0009] Furthermore, the left and right sides of the fixing box are respectively connected to fixing straps, and the lower surface of the fixing straps is covered with medical pressure-sensitive adhesive. The fixing box can be fixed to the patient's head by the fixing straps.

[0010] Furthermore, the interior of the fixed box is covered with a partition layer corresponding to the bolts. The partition layer can further maintain the seal inside the fixed box and prevent liquid from leaking out from the bolts. The partition layer itself is soft and can deform as the bolts are adjusted.

[0011] Furthermore, the bolt has a through-hole needle insertion channel at its axis and a heparin cap at its lower end to seal it. When medication is needed, a syringe with a needle is used to puncture the heparin cap and insert the needle into the puncture needle to administer the medication, thus avoiding multiple scalp punctures.

[0012] The beneficial effects of this invention are:

[0013] 1. By using the bolts on the top of the fixed box to cooperate with the internal puncture needle, the operator can rotate the bolts to push the puncture needle, which extends downward within the needle body fixing ring for puncture. The length of the puncture needle insertion can be set before puncture, thereby stabilizing the depth of the puncture needle insertion into the Ommaya sac and fixing the needle body. This effectively solves the problems of needle tip detachment and repeated punctures caused by unstable needle fixation in the existing technology.

[0014] 2. Through the absorbent ring set at the bottom of the needle fixing ring and the catheter and collection chamber connected to it, the absorbent ring can quickly absorb and expand after contact with exudate, automatically filling the gap between the puncture needle and the scalp. At the same time, excess exudate can be introduced into the absorbent resin in the collection chamber through the catheter, which actively prevents the accumulation of exudate around the puncture point and significantly reduces the risk of infection.

[0015] 3. With the needle insertion channel opened through the bolt axis and the heparin cap sealed at its lower end, the syringe needle can penetrate the heparin cap and reach the target directly through the internal channel of the puncture needle during drug administration. This structure eliminates the need for repeated punctures of the patient's scalp, reducing patient pain and simplifying the clinical procedure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments are briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0018] Figure 2 This is an isometric sectional view of Embodiment 1 of the present invention;

[0019] Figure 3 yes Figure 2 Enlarged diagram of part A in the middle.

[0020] The structural names represented by the labels in the attached diagram are as follows:

[0021] 1-Fixed box body, 101-Drainage tube, 2-Bolt, 201-Needle inlet channel, 202-Heparin cap, 3-Separating layer, 4-Needle body fixing ring, 5-Sealing ring, 6-Puncture needle, 601-Side hole, 7-Skin pad, 8-Anti-seepage ring, 9-Collection chamber, 901-Catheter, 10-Absorbent ring, 11-Fixed strap. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example 1

[0024] See Figures 1 to 3 As shown in the figure, this embodiment provides a specific implementation of a transscalp puncture Ommaya sac drainage and fixation device. The device mainly includes a fixation box 1 and a puncture needle 6 inside it, as well as a core adjustment and sealing structure.

[0025] The fixing box 1 is circular and hollow, made of rigid plastic, with a drainage tube 101 connected to its side for draining fluid from the Ommaya sac. A threaded hole is formed at the center of the top of the fixing box 1, and a bolt 2 is installed. An inwardly recessed needle fixing ring 4 is installed at the center of the bottom of the fixing box 1. A puncture needle 6 is coaxially mounted at the center of the needle fixing ring 4, and a sealing ring 5 is installed between the puncture needle 6 and the needle fixing ring 4. The upper half of the puncture needle 6 contacts the lower end face of the bolt 2, and its outer diameter is larger than that of the lower half. The puncture needle 6 extends vertically, and a side hole 601 is formed on the side of its upper half. The lower half of the puncture needle 6 extends out from the bottom of the fixing box 1 to puncture the pre-placed Ommaya sac under the patient's scalp. By rotating the bolt 2, the downward extension length of the puncture needle 6 can be controlled, thus pre-setting the required puncture length according to the thickness of the patient's subcutaneous tissue and the embedment depth of the Ommaya sac.

[0026] A water-absorbing ring 10 is provided around the bottom surface of the needle fixation ring 4, surrounding the puncture needle 6. The water-absorbing ring 10 is composed of a ring-shaped cavity filled with absorbent resin. After the puncture needle 6 punctures the scalp, the water-absorbing ring 10 can absorb tissue fluid or cystic fluid that seeps from around the puncture point and expands in volume, thereby actively filling the gap between the needle fixation ring 4 and the scalp puncture hole. To further manage the exudate, two catheters 901 are symmetrically provided at the bottom of the fixation box 1. One end of the catheter 901 extends into the inside of the water-absorbing ring 10 and corresponds to the root of the puncture needle 6, while the other end is connected to the collection chamber 9 installed on the side of the fixation box 1. The collection chamber 9 is also filled with some absorbent resin. Excess exudate can be introduced into the collection chamber 9 for absorption and storage through the catheters 901, preventing the exudate from accumulating on the surface of the puncture point.

[0027] The bottom of the fixation box 1, where it connects to the needle fixation ring 4, features a downward-protruding anti-seepage ring 8 made of soft silicone material, which allows it to fit snugly against the scalp surface when the device is fixed. Surrounding the anti-seepage ring 8, the bottom of the fixation box 1 is covered with a skin pad 7 made of hypoallergenic soft foam material, capable of adapting to the contours of different patients' scalps. Fixation straps 11 are connected to the left and right sides of the fixation box 1, respectively. These straps 11 are made of elastic non-woven fabric, with their lower surface covered with medical pressure-sensitive adhesive, allowing the fixation box 1 to be adhered to the patient's head.

[0028] Inside the fixed housing 1, the contact area between the bolt 2 and the threaded hole at the top of the housing is covered with a soft separating layer 3, which is made of a thin layer of silicone to ensure the internal sealing of the fixed housing 1. Furthermore, a through-hole needle insertion channel 201 is provided at the axis of the bolt 2, and the lower end of the bolt 2 is sealed by a heparin cap 202. When direct administration of medication into the Ommaya sac is required, medical personnel can use a syringe with a needle to directly puncture the heparin cap 202 and insert the needle through the needle insertion channel 201 into the puncture needle 6 to complete the medication administration without needing to puncture the patient's scalp again.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. For those skilled in the art, various modifications and variations can be made to the above embodiments without departing from the principles of the present invention, and all such modifications and variations should fall within the scope of protection of the present invention.

Claims

1. A transscalp puncture Ommaya sac drainage and fixation device, comprising a fixation box (1), wherein a drainage tube (101) is connected to the side of the fixation box (1), characterized in that: The top of the fixed box (1) is fitted with a bolt (2) through a threaded hole; the bottom of the fixed box (1) is opened and fitted with a needle fixing ring (4), and a puncture needle (6) is fitted through the needle fixing ring (4). The puncture needle (6) can be pushed by the bolt (2) and the lower half of the puncture needle (6) extends out of the bottom of the fixed box (1) to puncture the Ommaya sac. The bottom surface of the needle fixing ring (4) is provided with a water-absorbing ring (10) around the puncture needle (6); the bottom of the fixing box (1) is also provided with a conduit (901), one end of the conduit (901) is connected to the inside of the water-absorbing ring (10), and the other end is connected to a collection chamber (9).

2. The transscalp puncture Ommaya sac drainage and fixation device according to claim 1, characterized in that: A sealing ring (5) is installed between the puncture needle (6) and the needle body fixing ring (4).

3. The transscalp puncture Ommaya sac drainage and fixation device according to claim 1, characterized in that: The absorbent ring (10) is filled with absorbent resin, and the collection cavity (9) is filled with the same absorbent resin as the absorbent ring (10).

4. The transscalp puncture Ommaya sac drainage and fixation device according to claim 1, characterized in that: The bottom of the fixed box (1) is provided with a downward protruding anti-seepage ring (8) at the connection between the bottom of the fixed box (1) and the needle fixing ring (4), and the bottom of the fixed box (1) around the anti-seepage ring (8) is covered with a skin pad (7).

5. The transscalp puncture Ommaya sac drainage and fixation device according to claim 1, characterized in that: The fixed box (1) is covered with a soft partition layer (3) at the bolt (2).

6. The transscalp puncture Ommaya sac drainage and fixation device according to claim 1, characterized in that: The bolt (2) has a needle inlet channel (201) at its axial center, and the lower end of the needle inlet channel (201) is blocked by a heparin cap (202).

7. The transscalp puncture Ommaya sac drainage and fixation device according to claim 1, characterized in that: The side of the fixed box (1) is connected to a fixing strap (11), and the lower surface of the fixing strap (11) is covered with medical pressure-sensitive adhesive.

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