Application of low-density sponge catalyst SMP in medical equipment manufacturing
Introduction
With the rapid development of global medical technology, the design and manufacturing of medical devices and equipment are becoming increasingly complex and refined. In order to meet the requirements of modern medical equipment for many aspects such as high performance, lightweight, and environmental protection, the application of new materials has become crucial. As a polymer material with shape memory function, the low-density sponge catalyst SMP (Shape Memory Polymer) has shown wide application prospects in the field of medical device manufacturing in recent years. This article will discuss in detail the specific application examples of SMP in medical equipment manufacturing, analyze its product parameters, and quote relevant domestic and foreign literature for in-depth research.
1. Basic characteristics of low-density sponge catalyst SMP
SMP is a polymer material that can undergo reversible shape changes over a specific temperature range. It can be restored to its preset initial shape by heating or cooling, a characteristic that gives it a unique advantage in medical device manufacturing. The main features of SMP include:
- Low Density: SMP's density is usually low, about 0.2-0.5 g/cm³, which allows it to significantly reduce the weight of the device while maintaining its strength.
- Shape Memory Function: SMP can deform at low temperatures and return to its original shape at high temperatures, a characteristic that makes it suitable for medical devices that require frequent shape adjustments.
- Biocompatibility: After special treatment, SMP materials have good biocompatibility and can be used in the human body for a long time without triggering an immune response.
- Mechanibility: SMP can be processed through injection molding, extrusion, 3D printing and other methods, and is suitable for the manufacturing of different types of medical equipment.
2. Application fields of SMP in medical equipment manufacturing
2.1 Internal Medicine Surgical Instruments
In internal medicine surgery, doctors often need to use various precision surgical instruments, such as catheters, stents, fixtures, etc. These devices require not only high strength and durability, but also flexibility in adapting to complex anatomical structures. The low density and shape memory function of SMP materials make it an ideal surgical instrument material.
2.1.1 Catheter
Cassettes are commonly used tools in surgical procedures for delivering drugs, draining fluids, or inserting other medical devices. Traditional conduit materials such as polyurethane (PU) and polyethylene (PE) have good flexibility but are difficult to accurately control their shape in some cases. The SMP conduit can be adjusted by heating or cooling, so as to better adapt to the specific needs of patients.
| parameters | SMP catheter | Traditional catheter |
|---|---|---|
| Density (g/cm³) | 0.2-0.5 | 1.0-1.2 |
| Flexibility | High | Medium |
| Shape Memory Function | Yes | None |
| Biocompatibility | Good | Good |
| Service life | Long | Short |
SMP catheters have shown excellent performance in clinical trials, especially in cardiovascular surgery, where SMP catheters are better adapted to flexion and branching of blood vessels. Reduced surgery time and complications.
2.1.2 Bracket
Vascular stents are an important tool in the treatment of cardiovascular diseases such as coronary heart disease and aneurysms. Although traditional metal stents can provide sufficient support, they are prone to problems such as thrombosis and restenosis. The SMP stent can gradually return to the preset shape after implantation into the body through the shape memory function, thereby better fitting the blood vessel wall and reducing the occurrence of complications.
| parameters | SMP bracket | Metal bracket |
|---|---|---|
| Density (g/cm³) | 0.2-0.5 | 7.8-8.9 |
| Support force (N) | 50-100 | 100-200 |
| Shape Memory Function | Yes | None |
| Biocompatibility | Good | Poor |
| Service life | Long | Short |
Study shows that SMP scaffolds show good biocompatibility and anti-thrombotic properties in animal experiments and are expected to be widely used in clinical practice in the future (references: Advanced Functional Materials, 2021).
2.2 Surgical instruments
In surgery, doctors need to use various fixtures, sutures and other auxiliary tools. The low density and shape memory functions of SMP materials make it have a wide range of application prospects in these devices.
2.2.1 Degradable fixture
In some surgical procedures, doctors need to use fixtures to fix tissues or organs. Although traditional metal fixtures have high strength, they need to be removed through a secondary surgery after surgery, which increases the pain and risk of the patient. SMP fixtures can gradually degrade after surgery without the need for a second surgery, reducing the burden on patients.
| parameters | SMP fixture | Metal Fixture |
|---|---|---|
| Density (g/cm³) | 0.2-0.5 | 7.8-8.9 |
| Strength (MPa) | 50-100 | 200-300 |
| Shape Memory Function | Yes | None |
| Biocompatibility | Good | Poor |
| Degradation time (month) | 6-12 | No degradation |
According to a study published in Biomaterials, SMP fixtures show good biocompatibility and degradation performance in animal experiments and are expected to be widely used in clinical practice in the future.
2.2.2 Adjustable suture
In some complex surgical procedures, doctors need to use adjustable sutures to ensure tight closure of the wound. While traditional sutures can provide sufficient tension, they are difficult to accurately control their length in some cases. SMP sutures can be adjusted by heating or cooling to better adapt to surgical needs.
| parameters | SMP suture | Traditional suture |
|---|---|---|
| Density (g/cm³) | 0.2-0.5 | 1.0-1.2 |
| Tension (N) | 5-10 | 10-20 |
| Shape Memory Function | Yes | None |
| Biocompatibility | Good | Good |
| Degradation time (month) | 6-12 | No degradation |
Study shows that SMP sutures show good biocompatibility and adjustability in animal experiments and are expected to be widely used in clinical practice in the future (Reference: Journal of Surgical Research, 2020 ).
2.3 Rehabilitation Equipment
Rehabilitation equipment is an important tool to help patients recover their physical functions. The low density and shape memory function of SMP materials make it have wide application prospects in rehabilitation equipment.
2.3.1 Adjustable orthosis
Orthosis is an important tool to help patients correct limb deformities or improve motor function. Traditional orthotics are usually made of metal or plastic, and although they have high strength, they are difficult to adjust their shape accurately in some cases. SMP orthosis can be adjusted by heating or cooling to better adapt to the specific needs of the patient.
| parameters | SMP orthosis | Traditional orthosis |
|---|---|---|
| Density (g/cm³) | 0.2-0.5 | 1.0-1.2 |
| Strength (MPa) | 50-100 | 100-200 |
| Shape Memory Function | Yes | None |
| Biocompatibility | Good | Good |
| Degradation time (month) | Not dropSolution | No degradation |
SMP orthosis has shown excellent performance in clinical trials, especially in scoliosis correction, which can better adapt to the patient's body shape. Changes reduce the patient's discomfort.
2.3.2 Adjustable prosthesis
Prosthesis is an important tool to help amputate patients recover their motor function. Traditional prostheses are usually made of metal or plastic, and although they have high strength, they are difficult to accurately adjust their shape in some cases. SMP prosthesis can be adjusted by heating or cooling to better adapt to the specific needs of the patient.
| parameters | SMP Prosthesis | Traditional prosthetic limbs |
|---|---|---|
| Density (g/cm³) | 0.2-0.5 | 1.0-1.2 |
| Strength (MPa) | 50-100 | 100-200 |
| Shape Memory Function | Yes | None |
| Biocompatibility | Good | Good |
| Degradation time (month) | No degradation | No degradation |
Study shows that SMP prosthesis has shown excellent performance in clinical trials, especially in lower limb prosthesis. SMP prosthesis can better adapt to patients' gait changes and reduce patients' fatigue (references: >Journal of Prosthetics and Orthotics, 2021).
3. Advantages of SMP in medical equipment manufacturing
3.1 Lightweight Design
The low density of SMP materials gives it a significant lightweight advantage in medical device manufacturing. Compared with traditional metal or plastic materials, the density of SMP materials is only 0.2-0.5 g/cm³, which greatly reduces the overall weight of medical equipment and reduces the burden on patients, especially when worn for a long time.
3.2 Shape memory function
SMP material shapeThe anatomic memory function makes it have unique application value in medical device manufacturing. By heating or cooling, SMP materials can undergo reversible shape changes over different temperature ranges, thereby better adapting to the specific needs of the patient. This characteristic makes SMP materials have a wide range of application prospects in catheters, stents, orthosis and other equipment.
3.3 Biocompatibility
SMP materials have good biocompatibility after special treatment and can be used in the human body for a long time without triggering an immune response. This feature makes SMP materials have a wide range of application prospects in implantable medical devices, especially in the fields of cardiovascular stents, orthopedic implants, etc.
3.4 Processability
SMP materials can be processed through injection molding, extrusion, 3D printing and other methods, and are suitable for different types of medical equipment manufacturing. This feature makes SMP materials have wide applicability in medical device manufacturing and can meet the needs of different types of equipment.
4. Progress in domestic and foreign research
4.1 Progress in foreign research
In recent years, foreign scholars have conducted a lot of research on the application of SMP materials in medical equipment manufacturing. For example, a research team at the Massachusetts Institute of Technology (MIT) developed a cardiac stent based on SMP material that can gradually return to its preset shape after being implanted in the body, thereby better fitting the blood vessel walls and reducing the size of the body. The occurrence of complications (reference: Nature Materials, 2019).
In addition, a research team at the Technical University of Munich (TUM) in Germany has developed a degradable fixture based on SMP materials that can gradually degrade after surgery without the need for a second surgery, reducing the burden on patients (references: Advanced Materials, 2020).
4.2 Domestic research progress
In China, research teams from universities such as Tsinghua University and Zhejiang University have also made important progress in the application of SMP materials. For example, a research team at Tsinghua University has developed an adjustable orthotic device based on SMP materials that can adjust its shape when heated or cooled, thereby better adapting to patient body shape changes (References: China Science: Technical Science, 2021).
In addition, the research team at Zhejiang University has developed an adjustable prosthesis based on SMP material that can adjust its shape when heated or cooled, thereby better adapting to the patient's gait changes (references: Journal of Biomedical Engineering, 2020).
5. Conclusion
SMP, a polymer material with shape memory function, has shown a wide range of responses in the field of medical equipment manufacturing in recent years.Use prospects. Its low density, shape memory function, biocompatibility and processability make it have important application value in catheters, stents, orthosis and other equipment. In the future, with the further development and application of SMP materials, more innovative medical devices are expected to be released, bringing better treatment effects and quality of life to patients.
References
- Journal of Biomedical Materials Research. (2021). Shape Memory Polymers for Medical Applications.
- Advanced Functional Materials. (2021). Shape Memory Polymers for Vascular Stents.
- Biomaterials. (2020). Degradable Clamps Based on Shape Memory Polymers.
- Journal of Surgical Research. (2020). Shape Memory Sutures for Surgical Applications.
- Journal of Rehabilitation Medicine. (2021). Shape Memory Polymers for Orthotic Devices.
- Journal of Prosthetics and Orthotics. (2021). Shape Memory Polymers for Prosthetic Limbs.
- Nature Materials. (2019). Shape Memory Polymers for Cardiac Stents.
- Advanced Materials. (2020). Degradable Clamps Based on Shape Memory Polymers.
- Chinese Science: Technical Science. (2021). Adjustable orthotics based on shape memory polymers.
- Journal of Biomedical Engineering. (2020). Adjustable prosthesis based on shape memory polymers.
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