Medical devices are often dependent on the use of simple, yet effective tubing to do their work. Be it the transfer of fluids from one point to another, draining, or even the delivery of air, the tubing has to be able to withstand a number of different challenges. Therefore, those who produce silicone tubing for medical devices understand the importance of purity, precision, cleanliness, and more.
Why Silicone Works Well in Medical Tubing
Silicone is frequently used for medical tubing due to its combined flexibility. It has the desired mix of qualities that allow it to twist around the equipment without deforming under regular operating conditions. The surface of the material can be easily smoothed to allow free movement of fluids and gases.
Another advantage of silicone is its operating temperature range. Since products made from this substance are often subjected to various sterilization processes, tubing made from it can withstand high temperatures during these procedures. However, it should be noted that manufacturers must always check the compatibility of materials with specific forms of sterilization.
In addition, this type of tubing can be produced in different durometers, wall thicknesses, and diameters, which gives engineers more options when choosing the equipment’s design.
What Sets Silicone Tubing Manufacturers Apart
Reliable silicone tubing manufacturers do more than extrude material into a hollow shape. Medical applications require close control over raw materials, processing conditions, dimensions, and handling practices.
Consistency is extremely important. Variations in the inner diameter, outer diameter, or thickness of a tube can have a significant effect on the flow and pressure of fluid, connections, or assemble process. It is crucial that manufacturers have well established processes that ensure these measurements fall within a specified range.
Material traceability is crucial for device companies. Some manufacturers of medical devices require documentation that identifies the materials that are used as well as the specifics about the manufacturing process. This helps to ensure that if a problem occurs; it can be quickly narrowed down and dealt with.
Material Selection Based on the Application
Not all silicone formulas are created equally, as such, manufacturers must consider the nature of contact, exposure time, temperatures, pressures, and the sterilization processes that the material will undergo.
Medical-grade silicone comes in a variety of types and curing methods, with some medical devices and equipment necessitating the use of platinum-cured silicones. The nature of the medical device and its FDA approval class must be taken into account. Additionally, manufacturers should not provide unsubstantiated information pertaining to the properties of their materials. Instead, a medical device manufacturer should research the properties of the silicone they wish to use and compare it to their requirements.
Dimensional Precision Supports Device Performance
Tubing dimensions may dictate more than just the look of a finished product. Inner diameter dictates flow, while wall thickness can dictate flexibility and ability to stand up to pressure or collapse. Outer diameter can dictate whether the tubing will fit correctly into connectors, pumps, or device housings.
For this reason, engineers should be sure to dictate acceptable tolerances early in development. A manufacturer can take a look at those specifications and be able to determine if it’s extrusion process can hold those tolerances.
Prototype runs can be useful before larger production orders. They allow device teams to evaluate fit, handling, routing, and connection points under realistic conditions. Resources such as medicalsiliconetube.com may also help buyers explore available tubing options before discussing detailed specifications with a supplier.
Clean Production and Controlled Handling
One of the most important aspects of the technical requirements is the cleanliness of the tubing for medical equipment. The level of control should be selected based on the application area and the manufacturer’s quality assurance requirements.
The process of fabrication, cutting, inspection, storage, packaging, and transportation of the tube must be evaluated. In cases where material storage, extrusion, cutting, inspection, and employee handling steps are of concern, the risks of contamination are to be considered. Similarly, the packaging requires special attention since it will be responsible for the protection of the product. If the sterilization process is needed, the compatibility of the packaging material must be evaluated as well.
Sterilization Requires Application-Specific Validation
A material that tolerates one sterilization method may react differently to another. Heat, radiation, or chemical exposure can affect physical properties depending on the silicone formulation and processing history.
Device manufacturers cannot rely on the generic properties of silicone when it comes to the characteristics of medical tubing. It is necessary to consider specific factors related to the material formulation, sterilization cycles, packaging, and the number of times a product can be used.
Therefore, after sterilization, it is essential to assess the product’s visual appearance, flexibility, size, mechanical characteristics, and overall performance.
Custom Silicone Tubing for Specialized Devices
While standard sizes of the tubing may be sufficient for some applications, there are devices which require specific measurements or performance specifications. Silicone tubing manufacturers may be able to modify certain parameters such as ID, OD, thickness, hardness, length or other requirements.
Customization may also be made in terms of color or other identifying features where relevant. This applies particularly to assembly aids or specific device organization, and to highlight differences between products. Added features always have to be considered in terms of the application’s safety and performance requirements.
Engineering functions should take precedence over any aesthetic considerations. Variations in pressure, flow rates, bending forces and radius, connection type, temperature range, and contact specifications can have an impact on the tubing choice.
Quality Documentation Matters as Much as the Product
A tubing sample might look perfect, but it could still be missing documentation necessary for a regulated device program. Buyers should assess both the physical product and the quality systems of the manufacturer.
Some documentation that may be helpful includes material identification, batch records, inspection records, certificates, and other documents needed by the customer. The specific documentation needed will depend on the product, market, and use case.
A change control is another crucial element that should be taken into account. If any alterations in raw materials, processing, tooling, or location of production are made, they may have an impact on the tubing’s final form. The companies manufacturing devices need to have a thorough comprehension of what changes were introduced by suppliers and how they are examined.
Testing Should Reflect Real Device Conditions
Laboratory tests are useful, but tubing must also be tested in the manner it is intended to be used in the finished device. A tube can pass dimensional tests, but after repeated bending, clamping, pumping, or sterilization, it may act unpredictably.
Testing plans can include tensile strength, elongation, hardness, pressure, flow, and connection safety tests, among others. Particular tests are selected depending on the properties of the device under review. Testing options may vary, but relevant requirements should be imposed based on the design and risk analysis of a product.
In addition, engineers should test tubes with fittings and other equipment used in the assembly to check for compatibility and connection flaws, which cannot be found when testing blank tubes.
Supplier Communication Reduces Production Problems
The communication between the two sides can avoid any possible misunderstandings that can result in losses for both developers and manufacturers. The drawings and specifications provided by the former and used during purchase processing should include specific information on sizes, tolerances, materials, packaging and inspection requirements, and other features.
Forecasting is important to be applied when the product’s volume increases. The manufacturing partner should receive all the information needed to prepare materials, equipment time, inspection procedures, and packaging. It is vital for the device producers to consider the lead-time of the silicone tubing manufacturer as well as his ability to adjust production if demand rises.
The samples should meet the specifications of the production version of the device to ensure that testing can provide relevant information. It makes no sense to make a sample with different materials or dimensions since it can mislead the developers and result in failures during the final inspection.
Building a Reliable Tubing Specification
A strong specification links material requirements to device performance. It should define critical dimensions, acceptable tolerances, material characteristics, cleanliness expectations, packaging, and required documentation.
Avoid setting unnecessarily tight tolerances that add nothing to the function of the device. Unduly tight requirements are more likely to complicate manufacturing than improve a device. At the same time, critical dimensions that define the performance of a device such as those determining flow, sealing, or kinematic interactions require sufficient control during fabrication to perform consistently.
A collaborative review of the specification by engineering, quality, purchasing, and the tubing supplier can help preempt production issues.
Making a Confident Medical Tubing Decision
Medical silicone tubes should be considered as an integral part of any medical device, and not just a commodity. Material selection, tolerances, manufacturing practices, sterilization compatibility, testing, documentation, and communication with suppliers must be taken into account.
While medical device design teams can consult medicalsiliconetube.com, make sure that specifications and testing in a given application are done before making a final selection. It is important to have good control over the specifications and to communicate requirements clearly to the manufacturer in order to be able to consistently receive high-quality tubing.
