Medical Injection Pen Test

Why Injection Pens Are Redefining Modern Medicine Delivery

Injection pens have become a cornerstone in the delivery of various medications, offering patients a convenient and comfortable way to self-administer prescribed doses. Unlike typical oral medications, which are often effective for only short periods and require daily use, injection pens deliver medication in a single dose that can last up to a week. This convenience has led to a surge in their popularity, particularly with the rise of weight loss treatments. Once-weekly injections are increasingly favored not only for their ease of use but also for their proven ability to provide consistent and reliable doses. The growing demand for weight loss medications has further fueled the adoption of injection pens, emphasizing their effectiveness and convenience in modern treatment regimens.

Testing Injection Pens: Balancing Durability, Precision, and Patient Comfort
Injection pens undergo rigorous quality assurance testing due to their direct use by humans. These devices must meet strict safety standards for durability, repeatability, and robustness. Testing ensures a maximum allowable force is applied during injection, consistent dosage speed, and precise accuracy. Pens are also evaluated for ease of use and performance across various environmental conditions. Key parameters, such as stroke length, which correlates to the medication volume dispensed, must be calibrated for correct dosage. The force required to start and maintain injection pressure is crucial for patient comfort and minimizing irritation. Additionally, injection speed must be optimized to allow proper dose delivery, ensuring the medication is effective.

Integrating Advanced Load Cells and Actuators for Reliable Injection Pen Performance
Once an injection pen is assembled, they must be tested for safety and reliability. Automatic syringe testing machines can be used for pen design R&D, test and measurement, and quality control. The forces applied on the syringe must be accurately recorded, while the actual syringe depression length must be constantly monitored. With the essence of safety and effectiveness in mind, it is essential that high precision load cells and actuators are used to provide accurate and repeatable data during testing.

Importance of Breakaway and Glide Force Measurement
Force measurement is crucial in injection pens, particularly the breakaway and glide forces. Breakaway force is the initial force required to start the injection, while glide force is the constant force needed for steady, controlled medication delivery. Properly calibrated forces ensure patient comfort and ease of use. A syringe test machine with a load cell is used to accurately measure these forces. If breakaway force is too high, it can cause pain, irritation, or bruising at the injection site. Inconsistent or weak glide force may lead to incomplete doses.
To achieve the necessary level of precision, FUTEK’s LSB205 is an ideal solution. Known for its high accruacy, small form factor, and large capacity range, this load cell is perfectly suited for measuring the forces involved in injection pen testing. The on-board PT1000 RTD adds another layer of functionality by allowing analysis of injection pens in varying conditions, ensuring they remain reliable. Addtionally, the LSB205 is fatigue-rated, meaning it can handle extended test durations with high cycle times, reducing machine down time and increasing testing efficiency. The integrated TEDS recognition further simplifies integration, making the load cell a true plug-and-play solution. Overall, when looking for accurate and reliable measurements, the LSB205 is a standout choice for force sensing in medical applications.

Consideration of Syringe Stroke Length and Speed of Injection
Linear actuators and position measurement systems are essential for measuring syringe stroke length and injection speed. Stroke length directly correlates to the medicine dose, so accurate measurement is crucial. During testing, ensuring the stroke length meets specifications helps identify issues like material defects or mechanical resistance, which can lead to underdosing and ineffective medication delivery. Injection speed is also vital, as too slow a speed causes discomfort, patient anxiety, and prolonged injection site irritation. Linear actuators and position measurement systems allow manufacturers to track and optimize plunger speed, ensuring effective and comfortable delivery.

In conjunction with FUTEK’s LSB205 load cell, Jenny Science’s Forceteq® Pro can create a comprehensive solution for obtaining detailed, comprehensive testing data. The Forceteq® Pro integrates Jenny Science’s high-performance linear actuators to complement FUTEK’s robust force measurement capabilities. These linear actuators provide micron-level position control for stroke lengths up to 150 mm. This precision is essential in the medical device industry, where small deviations can lead to system error and compromised patient safety. By combining real-time force and displacement data, this integrated system provides invaluable insight into both the force applied during the injection, and the exact movement of the syringe plunger. The collaboration between FUTEK and Jenny Science brings together cutting-edge technology for high-quality, reliable testing. An integrated approach ensures medical devices meet stringent performance, safety, and quality standards.

For further details about Forceteq® Force Measurement Technology, visit Jenny Science website.