If you are reading this guide, you have likely just made an important and exciting decision to start using a Tandem insulin pump. Whether you selected the Tandem t:slim X2 or the highly compact Tandem Mobi, congratulations! Taking the step to use an insulin pump is a major milestone. These devices are powerful, advanced tools that can significantly improve your daily diabetes management and grant you a new level of flexibility.
As you prepare to start your pump therapy, you have one final decision to make: choosing your infusion set. If you feel overwhelmed by the medical terms and product names, do not worry. This decision is much simpler than it looks.
An infusion set is simply the part of the pump system that delivers insulin directly into your body. It includes a length of plastic tubing that connects to your pump cartridge and a very small cannula (a tiny, flexible tube) or needle that sits just under your skin. Because everyone has a different body type, lifestyle, and skin sensitivity, there is no single best infusion set for tandem pump users. Many patients try a few different options before finding the one that works flawlessly for their unique needs.
The Three Main Types of Infusion Sets
When you look at the menu of tandem infusion set options, you will notice several different product names. Fortunately, we can organize almost all Tandem infusion sets into three main categories. Understanding these three broad groups makes it much easier to select your starting point.
The three primary categories are:
- 90-degree soft cannula sets
- Angled soft cannula sets
- Steel needle sets
Each category offers distinct benefits depending on your body shape, your daily activity level, and your personal preferences for inserting the device. Let’s break down exactly how each type works.
90-Degree Soft Cannula Sets
For most new pump users, doctors and diabetes educators recommend starting with a 90-degree soft cannula set. This category includes popular models like the AutoSoft 90 and the AutoSoft XC.
These infusion sets get their name from how they enter your body. The small, flexible cannula inserts straight down into the skin at a direct 90-degree angle. They come packaged with a built-in, spring-loaded automatic inserter device. To apply the set, you simply squeeze the sides of the plastic device, and it quickly and painlessly inserts the cannula for you. The guiding needle retracts instantly, leaving only the soft, flexible plastic tube comfortably resting under your skin.
Because of the automatic inserter and the straightforward downward angle, these sets are incredibly simple to learn and highly reliable. They require very little manual dexterity, making them the most common and accessible starting option for people transitioning to pump therapy for the very first time.
Angled Soft Cannula Sets
If you are particularly lean, muscular, or highly active, you might prefer an angled soft cannula set. This category includes the AutoSoft 30 and the vari soft infusion set.
Instead of going straight down into your tissue, these sets insert into the skin at an angle—typically around 30 to 45 degrees. When comparing the autosoft 90 vs autosoft 30, the primary difference is this angle of entry. Because the cannula slides in diagonally, it does not sit as deeply beneath the skin. This makes angled sets an excellent choice for individuals who have less body fat or who worry about an infusion set hitting a muscle during intense sports and physical activities.
Angled sets also provide greater flexibility for infusion site placement. For instance, the VariSoft allows you to insert the cannula entirely manually without a spring-loaded device. This manual insertion gives you complete control over the speed and the precise angle, allowing you to bypass scar tissue or adapt to specific areas of your body with ease.
Steel Needle Infusion Sets
While the word “needle” might sound intimidating at first, many experienced pump users swear by steel needle infusion sets. The most notable example in this category is the trusteel infusion set.
Rather than using a flexible plastic cannula that stays under the skin, these sets use a remarkably tiny, ultra-thin steel needle to deliver your insulin. The steel needle remains in place while you wear the set. Patients often prefer steel needle sets if they have previously experienced frustrating issues with soft cannulas. Sometimes, plastic cannulas can bend or kink under the skin during insertion, causing a blockage known as an occlusion. When a cannula bends, it leads to inconsistent insulin absorption and unexpected high blood sugar levels.
Because steel cannot bend or kink under the skin, the TruSteel infusion set guarantees reliable, consistent insulin delivery. It is a fantastic, worry-free option for people who want absolute certainty that their insulin is flowing correctly.
Tubing Length Options
Once you select the style of the infusion set, you will also need to choose the length of the tubing that connects the site to your pump. Most tandem infusion sets come with several tubing length options, typically ranging from about 23 inches up to 42 inches.
If you are using the new Tandem Mobi, you also have access to an ultra-short 5-inch tubing option designed specifically for wearing the compact pump directly on your body using an adhesive sleeve.
For the majority of standard pump users, starting with the 23-inch tubing length works perfectly. It provides enough slack to easily clip the pump to your waistband, slip it into your pocket, or tuck it inside your clothing without leaving excess tubing catching on doorknobs or cabinet handles. If you are exceptionally tall or prefer to keep your pump securely in a deeper pocket or a specialized leg band, stepping up to the 32-inch or 42-inch tubing might suit your lifestyle better.
Finding the Right Infusion Set
Please remember that choosing an infusion set is not a permanent, binding decision. It is completely normal for patients to try more than one infusion set over time. Your body, your lifestyle, and your preferences will evolve, and your pump therapy can evolve right alongside you.
When you evaluate your infusion set, prioritize three things: physical comfort, consistent insulin absorption, and your personal confidence when using the pump. These factors are far more important than stressing over choosing the “perfect” option immediately out of the gate. If your first choice feels uncomfortable or causes issues, you can simply change your prescription and try a different style later.
Medically Modern Support
At Medically Modern, we proudly provide all Tandem infusion set options, and we work closely with our patients to help them find exactly what works best. Our goal is to make your transition to pump therapy as smooth and stress-free as possible.
If you start with one style and decide it does not fit your needs, you are not stuck. You can easily switch your infusion sets with your future supply orders if you want to test a different option. Reassure yourself that today, the goal is simply to choose a good, reliable starting point. We are here to support you through every step of your diabetes management journey.
