Composite dilator for directional blood flow training

Abstract

The invention discloses a directional blood flow training composite dilator, and relates to the technical field of medical instruments. The device comprises an expansion bag, one side of the expansion bag is communicated with a water injection connecting pipe, the other end of the water injection connecting pipe is communicated with a water injection kettle, and one side of the expansion bag is provided with a stem cell injection kettle. The hard base plate structure is arranged, the rigid characteristic of the hard base plate can restrain the expansion bag to only expand towards the upper soft tissue direction, directional controllable mechanical stress is formed, a one-way expansion mode promotes new blood vessels to grow in order in the preset direction, the blood vessel density and blood supply quality of the expanded skin flap are remarkably improved, and the expansion effect is good. The design of the uniformly distributed grooves provides an accurate positioning reference for blood flow training, so that a blood supply path can be accurately controlled during follow-up blood flow blocking training through instruments such as an elastic band, finally, an axial flap with a clear vascular pedicle is formed, and the survival rate and the tissue utilization rate of the flap after transplantation are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a directional blood flow training composite dilator. Background Technology

[0002] As an advanced treatment method unique to plastic surgery, tissue expanders involve implanting a skin and soft tissue expander under normal skin and soft tissue near the lesion. By intermittently injecting fluid into the expander sac to increase the expansion volume, it exerts pressure on the surface skin and soft tissue. Through the expansion mechanism, the local effect causes the division and proliferation of tissue and epidermal cells and the widening of intercellular spaces, thereby increasing the skin area. After the expander sac is removed, the newly added skin and soft tissue can be used for tissue repair and organ reconstruction.

[0003] While expanders are widely used in clinical practice, their mechanism of action has an inherent limitation: the expansion force generated after implantation is bidirectional, extending from the inside out. This "inside-out" expansion means that the newly generated skin tissue does not simply thicken outwards; the subcutaneous blood circulation network also extends passively and dispersedly. This results in a relatively lower density of effective blood supply units in the expanded skin, and the efficiency of blood circulation is not optimized. In subsequent flap transfer and repair, the tissue vitality and utilization rate of this part of the skin may be affected, failing to fully achieve the ideal effect of the expansion procedure.

[0004] To address these issues, we provide a directional blood flow training compound dilator. Summary of the Invention

[0005] The purpose of this invention is to provide a directional blood flow training composite expander, which solves the problem that current expanders expand both internally and externally after implantation, resulting in dispersed blood circulation in the expanded skin and insufficient skin expansion.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0007] This invention relates to a directional blood flow training composite dilator, comprising a dilator bladder, a water injection connection tube connected to one side of the dilator bladder, a water injection reservoir connected to the other end of the water injection connection tube, a stem cell injection reservoir disposed on one side of the dilator bladder, a stem cell connection tube connected to one side of the stem cell injection reservoir, and a rigid base plate installed at the bottom of the dilator bladder, the surface of the rigid base plate being grooved.

[0008] The invention is further configured such that the dilation sac is made of silicone capsule material, which expands fully after being filled with water, and the water injection vessel is connected to an external syringe for injecting physiological saline.

[0009] The present invention is further configured such that the expanded bladder has a hemispherical shape after expansion, and the bottom surface of the expanded bladder is in contact with the rigid chassis.

[0010] The present invention is further configured such that the rigid chassis is made of silicone pad and titanium mesh, with the titanium mesh wrapped around the outside of the silicone pad to form a composite.

[0011] The present invention is further configured such that the water inlet is shaped like a frustum cone and has a water inlet hole at the top, and the stem cell injection vessel is shaped like a frustum cone and has a liquid inlet hole at the top.

[0012] The present invention is further configured such that the other end of the stem cell connecting tube is bent and fitted into the groove, and the size of the stem cell injection vessel is smaller than the size of the water injection vessel.

[0013] The invention is further configured such that the groove is a concave design, uniformly covering the surface of the rigid chassis, and the rigid chassis is used to constrain the expansion direction of the expansion bladder.

[0014] The present invention has the following beneficial effects.

[0015] 1. This invention, by setting a rigid chassis structure, can constrain the expansion sac to expand only in the direction of the soft tissue, forming directional and controllable mechanical stress. The unidirectional expansion mode promotes the orderly growth of new blood vessels in a predetermined direction, significantly improving the vascular density and blood supply quality of the expanded flap. The uniformly distributed groove design provides a precise positioning benchmark for blood flow training, enabling accurate control of the blood supply path during subsequent blood flow occlusion training using elastic bands and other instruments. Ultimately, it forms an axial flap with a clear vascular pedicle, greatly improving the survival rate and tissue utilization rate after flap transplantation.

[0016] 2. This invention achieves a synergistic effect of biological therapy and mechanical expansion through an independent stem cell injection vessel and connecting tube. The stem cell connecting tube outlet is precisely positioned in the groove area at the bottom of the expansion sac, allowing stem cells or growth factors to be directly infused into the expansion interface microenvironment. This not only avoids mutual interference with the main water injection pipeline but also promotes local tissue regeneration and angiogenesis, effectively enhancing the physiological activity and thickness quality of the expanded flap. This treatment mode, which combines mechanical expansion with bioactive factors, significantly improves problems such as tissue thinning and poor blood supply caused by traditional simple mechanical expansion.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of a directional blood flow training composite dilator.

[0020] Figure 2 This is a top view of a directional blood flow training compound dilator.

[0021] Figure 3 This is a schematic diagram of a directional blood flow training compound dilator in use.

[0022] In the attached diagram: 1. Expansion sac; 2. Water infusion tube; 3. Water infusion vessel; 4. Stem cell injection vessel; 5. Stem cell infusion tube; 6. Rigid base; 7. Groove. Detailed Implementation

[0023] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments. Example 1

[0024] Please see Figures 1-3 The present invention is a directional blood flow training composite dilator, including a dilator 1, a water injection connection tube 2 connected to one side of the dilator 1, a water injection bottle 3 connected to the other end of the water injection connection tube 2, a stem cell injection bottle 4 provided on one side of the dilator 1, a stem cell connection tube 5 connected to one side of the stem cell injection bottle 4, and a rigid base plate 6 installed at the bottom of the dilator 1, with grooves 7 formed on the surface of the rigid base plate 6.

[0025] Further details: The expansion sac 1 can be fully expanded by water injection, thereby applying uniform and sustained pressure to the surface skin and soft tissue, promoting an effective increase in skin area. The water injection connecting tube 2 is used to stably introduce externally injected saline into the expansion sac 1, ensuring the controllability and reliability of the expansion process. The water injection bottle 3 serves as a water injection interface, facilitating repeated water injection operations by medical personnel. The stem cell injection bottle 4 is specifically used to receive biological agents such as stem cells or growth factors, providing an effective delivery channel for enhancing tissue regeneration. The stem cell connecting tube 5 can precisely deliver stem cells or cytokines to the target area, improving the targeting and effectiveness of treatment. The rigid base 6 can effectively constrain the expansion direction of the expansion sac 1, preventing it from expanding disorderly to the bottom and achieving directional skin expansion. The grooves 7 on the surface of the rigid base 6 provide a basis for subsequent blood flow training and can also accommodate the outlet of the stem cell connecting tube 5. Example 2

[0026] Please see Figures 1-3Based on Example 1, the expansion sac 1 is made of silicone capsule material and expands fully after being filled with water. The water injection bottle 3 is connected to the external syringe for injecting physiological saline. The expanded shape of the expansion sac 1 is hemispherical. The bottom surface of the expanded expansion sac 1 is attached to the rigid base plate 6. The rigid base plate 6 is made of silicone pad and titanium mesh. The titanium mesh is wrapped around the outside of the silicone pad to form a composite. The water injection bottle 3 is shaped like a frustum and has a water inlet at the top. The stem cell injection bottle 4 is shaped like a frustum and has a liquid inlet at the top. The other end of the stem cell connecting tube 5 is bent and attached to the groove 7. The size of the stem cell injection bottle 4 is smaller than that of the water injection bottle 3. The groove 7 is a concave design and is evenly covered on the surface of the rigid base plate 6. The rigid base plate 6 is used to constrain the expansion direction of the expansion sac 1.

[0027] Further details: Figure 3 In the diagram, A1 represents the vascular pedicle of the expanded flap training, B1 represents the expanded skin with the implanted expander, C1 represents the hand-cranked tightening machine, and D1 represents the elastic band. The expansion sac 1 uses a silicone capsule material with good biocompatibility and flexibility, which can adapt to the internal environment and achieve uniform and controllable expansion. The close fit between the bottom surface of the expansion sac 1 and the rigid base plate 6 ensures that the expansion force is concentrated and transmitted upward, avoiding downward compression of tissue, and achieving unidirectional controllable expansion. The rigid base plate 6 uses a composite structure of silicone pad and titanium mesh, which provides sufficient rigidity to resist expansion pressure. The frustum-shaped structure of the water inlet 3 facilitates the insertion and fixation of the syringe, preventing it from falling off during water injection. The bent arrangement of the stem cell connecting tube 5 avoids pipe twisting or compression, ensuring unobstructed stem cell delivery. The small size of the stem cell injection bottle 4 helps to quickly identify different functional interfaces during surgery, improving operational accuracy. The concave design of the groove 7 provides a fixed path for blood flow training, facilitating the implementation of directional blood flow training.

[0028] The working principle of this invention is as follows: The expander of this application has three functional parts. The first part is unidirectional expansion. Existing expanders are soft sacs, and the expansion force after water injection diffuses in four directions. Therefore, when the sac is implanted in the body, expansion occurs in four directions. The expander of this application has a rigid base plate 6 at the bottom of the expander sac 1. The rigid base plate 6 uses a silicone pad and titanium mesh to block the downward pressure of the expander sac 1. The second part is blood training. A groove 7 is added to the outer circumferential surface of the rigid base plate 6. The groove 7 is used to allow blood to circulate after the expander expands. Effective blood training is performed using a blood trainer (the blood trainer utilizes the principle of tubular blood training). After training, the expanded skin flap forms an axial skin flap, ultimately obtaining sufficient skin to fully utilize the expanded skin. The third part can introduce stem cells and cytokines to enhance the expansion effect. This application also includes a stem cell injection chamber 4 and a stem cell connecting tube 5. The opening of the stem cell connecting tube 5 is located in the groove 7, allowing stem cells or cytokines to be introduced from the injection tube into the bottom of the expansion sac 1 and the gap between the expansion sac 1 and the subcutaneous tissue.

[0029] like Figure 3 As shown, taking a chest scar as an example, the procedure begins with the implantation of an expander. The child is placed under general anesthesia. An incision is made on the outer side of one side of the scar, and a cystic cavity and an incision the size of the expander base are dissected. After the expander is implanted, the sutures are removed 8 days post-surgery, and fluid infusion begins, once every other day. In the later stages of fluid infusion, autologous stem cells can be injected from another stem cell injection chamber 4, or cytokines or CGF (growth factor) can be injected. When the injection volume reaches 100% of the original, the injection is stopped. After maintaining expansion for 2 weeks, blood training is started using a blood training device. Elastic bands are used to tighten and pressurize the groove 7 of the rigid base 6, leaving a blood inlet (i.e., the vascular pedicle area of ​​the expanded flap training). Then, a hand-cranked tightening machine is used to manually tighten the expanded skin (excluding the vascular pedicle area) with the expander implanted. When the blood training time reaches 8 hours, an island flap can be trained. The scar can then be surgically removed, the expander removed, and the trained pedicle used as the flap pedicle to transfer the flap to repair the defect.

[0030] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A directional blood flow training composite dilator, comprising a dilator bladder (1), characterized in that: One side of the expansion sac (1) is connected to a water injection pipe (2), and the other end of the water injection pipe (2) is connected to a water injection bottle (3). A stem cell injection bottle (4) is provided on one side of the expansion sac (1), and a stem cell injection bottle (4) is connected to one side of the stem cell injection bottle (4). A rigid base plate (6) is installed at the bottom of the expansion sac (1), and grooves (7) are opened on the surface of the rigid base plate (6).

2. The directional blood flow training compound dilator according to claim 1, characterized in that: The dilation sac (1) is made of silicone capsule material and expands fully after being filled with water. The water injection bottle (3) is connected to an external syringe for injecting physiological saline.

3. The directional blood flow training compound dilator according to claim 1, characterized in that: The expanded bladder (1) is hemispherical after expansion, and the bottom surface of the expanded bladder (1) fits against the rigid chassis (6).

4. The directional blood flow training compound dilator according to claim 1, characterized in that: The rigid chassis (6) is made of silicone pad and titanium mesh, with the titanium mesh wrapped around the outside of the silicone pad to form a composite.

5. The directional blood flow training composite dilator according to claim 1, characterized in that: The water inlet (3) is shaped like a frustum and has a water inlet at the top. The stem cell injection inlet (4) is shaped like a frustum and has a liquid inlet at the top.

6. The directional blood flow training compound dilator according to claim 1, characterized in that: The other end of the stem cell connecting tube (5) is bent and attached to the groove (7), and the size of the stem cell injection bottle (4) is smaller than the size of the water bottle (3).

7. The directional blood flow training composite dilator according to claim 1, characterized in that: The groove (7) is a concave design and is uniformly covered on the surface of the rigid chassis (6). The rigid chassis (6) is used to constrain the expansion direction of the expansion sac (1).

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