Insulin Pumps

Posted on October 31, 2025 by Patrick Hercules

Insulin pumps can help people with diabetes conveniently manage their blood sugar. These small, wearable devices supply a continuous flow of rapid-acting insulin underneath the skin, delivering doses at specific times, and are an alternative to multiple daily injections.

An insulin pump mimics how the pancreas would naturally release insulin. It delivers insulin in one of two ways:

Small and continuous doses are called basal insulin. A person with diabetes will likely have multiple basal rates in increments throughout the day due to the body requiring different amounts of small “background” doses throughout a 24-hour period

Manual surges of insulin when eating and correcting high blood sugar are called bolus insulin. The pump uses the information the user enters about their carbohydrate intake and blood sugar level to calculate how much bolus insulin they need. Most pumps will recommend a dose to the user, which they can then confirm or adjust before the insulin is delivered

There are several types of insulin pumps on the market with unique features. Each type and brand of pump has various settings, including:

Integration with continuous glucose monitor (CGM) technology to automatically increase, decrease, or stop insulin release based on a person’s glucose level

Options to manually increase or decrease the basal rate for a certain amount of time

Alarms to alert the user of a low battery or a low reservoir

Alarms to alert the user if their glucose level is out of range, the CGM communicates with their pump

Connectivity to phone apps and other smart devices

There are two main types of insulin pumps: those with tubing and those without tubing.

Tubed insulin pumps have a long, thin tube that connects the pump to a cannula, a thin, flexible tube, inserted under the skin to deliver insulin. Parts of a tubed insulin pump include:

The pump machine and technology

The tubing and infusion set

Most reservoirs and infusion sets should be changed every two to three days. And the reservoir must be changed if it runs out of insulin. New infusion sets, reservoirs, and tubing should be used every time; however, the pump itself can typically last for many years.

Tubeless insulin pumps, or patch pumps, also use a cannula under the skin. However, the insulin reservoir and the cannula are part of one pod that sits on the skin with an adhesive patch. There is no external tubing, and it can be operated wirelessly with a handheld controller.

Each pump or pod can be used at a time. Like a tubed pump, it needs to be changed every two to three days and must be changed if the reservoir runs out of insulin.

Before attaching the pod, the reservoir is filled with insulin and attached with adhesive to the skin. A button is then pressed that releases a needle that is threaded through the cannula in the pod. The needle retracts back into the pod, and the cannula remains under the skin. The pump can be worn on the upper arm, stomach, hip, buttock, or thigh.

Tubeless insulin pumps are waterproof, so they can be worn when bathing or swimming.

Anyone with diabetes who requires synthetic insulin can use an insulin pump. This includes children and adults with Type 1 diabetes, some people with Type 2 diabetes, and people with Type 3c or monogenic diabetes.

Each insulin pump has different Food and Drug Administration (FDA) approvals regarding how old a person can be to use it. Some insulin pumps have approval for children as young as two years old. Most other pumps have approval for those seven years and older.

Using an insulin pump has several advantages, including:

Not having to inject insulin

It is more discreet than injecting insulin with a syringe

It is more accurate at delivering insulin

It may help with tighter blood glucose control

There are fewer fluctuations in blood glucose levels

It may result in improved A1C

There are fewer episodes of low blood sugar

There is more flexibility with diet and exercise

It helps manage the early morning rise in blood glucose levels called the dawn phenomenon

Using an insulin pump can also have its disadvantages, including:

Increased weight gain

Increased risk of diabetic ketoacidosis if the pump doesn’t work correctly

Risk of skin infection or irritation at the application site

Needing to be attached to the pump most of the time

Having to operate the pump, replace its batteries, set doses, etc.

Having to wear the pump makes it obvious you have diabetes

Learning how to use the pump and keeping it working properly

Having to check blood sugar levels several times a day and count carbohydrates

It can be more expensive than taking traditional insulin injections

There are many factors to consider when choosing an insulin pump. Fortunately, pump manufacturers have a lot of information on their products, and trainers who can answer questions.

It is very important to discuss your options with a diabetes healthcare provider.

If you have any questions about which insulin pumps are best for you, or if you would like help to manage your diabetes, you can speak with an endocrinologist at Flushing Hospital Medical Center’s Ambulatory Care Center. To schedule an appointment, please call (718) 670-5486.

All content of this newsletter is intended for general information purposes only and is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. Please consult a medical professional before adopting any of the suggestions on this page. You must never disregard professional medical advice or delay seeking medical treatment based upon any content of this newsletter. PROMPTLY CONSULT YOUR PHYSICIAN OR CALL 911 IF YOU BELIEVE YOU HAVE A MEDICAL EMERGENCY.

What is the Difference Between Diabetes and Insulin Resistance?

Posted on September 13, 2023 by Jacob Lobosco

Diabetes and insulin resistance both involve some of the same elements. Specifically, a key factor in both conditions is the inability of the pancreas to produce enough insulin to control blood sugar levels in your body. Insulin allows your cells to absorb sugar from the blood, providing these cells with the energy they need to function and keep blood sugar levels normal.

Despite the similarities in terms of how insulin resistance and diabetes work, not everyone with one has the other. In a person with insulin resistance, cells in the muscles, fat, and liver do not respond as well as they should to insulin; the pancreas may be producing a normal amount of insulin, but because cells are not processing it effectively, this normal amount is not enough to support these cells’ ability to function.

A person with Type 1 or Type 2 diabetes can experience insulin resistance, but not everyone with diabetes is necessarily insulin resistant. Type 2 diabetes can occur as a result of the pancreas not making as much insulin as it’s normally supposed to; while the body’s cells may still be able to process insulin normally, not enough of it is being produced to support cell functions. This also occurs in people with Type 1 diabetes due to their immune system targeting insulin-producing cells in the pancreas.

Insulin resistance also doesn’t necessarily lead to diabetes in everyone who experiences it. While it can progress into prediabetes and, eventually, Type 2 diabetes if left untreated, it’s also associated with other conditions, including cardiovascular disease, fatty liver disease, metabolic syndrome, and polycystic ovary syndrome. Insulin resistance also isn’t necessarily a chronic condition; it can occur temporarily in some people.

If you’re experiencing symptoms of either insulin resistance or diabetes, you can receive treatment from an endocrinologist at Flushing Hospital Medical Center’s Ambulatory Care Center. To schedule an appointment, please call (718) 670-5486.

Learn How to Properly Store Your Insulin in the Summer

Posted on July 5, 2019 by Michael Hinck

We would never waste our food or allow it to become spoiled by the heat, but what about medicines? Medicines should not be the exception, specifically insulin.

Insulin is a protein which is dissolved in water and is required to manage blood sugar levels in diabetics. As with any protein, bacteria can grow in insulin, making it susceptible to become spoiled. Bacteria can also break down the proteins in insulin and makes it less effective. Keeping insulin cool can help prevent it from spoiling and maintain its effectiveness. The recommended temperature for storage, once opened, should be anywhere from 59-68 degrees Fahrenheit. For insulin not in use, store between 36-46 degrees Fahrenheit. For many diabetics, insulin is most comfortably administered at room temperature.

Some other storage tips include:
• Do not freeze or use thawed insulin. The freezing temperature will break down the proteins and will not work to lower blood sugar levels.
• Do not leave in sunlight. This can break down the proteins in insulin as well.
• Inspect insulin prior to each use. Ensure that there are no clumps, crystals or particles in the bottle or pen. Insulin should be clear.
• Write the ‘start use’ date on the insulin vial and discard after 28 days or if it’s been opened.
• Never use expired insulin.
• Be wary of any unusual smells. Insulin should never have an odor or bad smell.

Insulin is administered in many forms including injections, pens or cartridges. Each may have different recommended storage times based on their manufacturer. It is important to check with a pharmacist, package insert, or the manufacturers’ website to ensure proper storage temperature of insulin.