Advanced Insulin Pumps Help Older Adults with Type 1 Diabetes Achieve Better Blood Sugar Control

Researchers at 19 Spanish hospitals studied 100 adults age 65 and older who started using an advanced hybrid closed-loop (aHCL) insulin pump system—a device that automatically adjusts insulin delivery based on continuous glucose readings. They compared their results to 100 similar patients of the same age and sex who continued using multiple daily injections (MDIs).

The team measured blood sugar control, safety, satisfaction with treatment, and whether cognitive or physical limitations affected how well the system worked. They followed participants from the start of their pump therapy through their final visit.

Adults using the automated pump system saw meaningful improvements. Time in range—the percentage of time blood sugar stayed in the healthy target zone of 70–180 mg/dL—jumped from 65.3% before starting the pump to 78.6% afterward.

Their HbA1c levels, which measure average blood sugar over three months, dropped from 7.56% to 7.01%. At their final visit, pump users had significantly better outcomes than those still using injections: 78.6% time in range versus 63% for injection users, and lower HbA1c (7.01% versus 7.65%).

One of the most striking findings was the reduction in severe hypoglycemia—dangerously low blood sugar episodes that require outside help. Before starting the pump, the group experienced an average of 28 severe low-blood-sugar events per 100 patient-years. After switching to automated insulin delivery, that number plummeted to just 1.6 events per 100 patient-years.

This dramatic decrease is particularly important for older adults, who may be at higher risk for injury or complications if they lose consciousness from a severe low.

A concern with any new medical technology is whether it works equally well for all users. This study found that 60% of the pump users had mild-to-moderate cognitive impairment—meaning they had some difficulty with memory or thinking. Yet their blood sugar control improved just as much as those without cognitive challenges.

The results suggest that automated insulin delivery systems can be effective even for older adults with cognitive limitations, though support and training remain important. High treatment satisfaction among users indicates they found the pump practical and preferable to injections.

Source: Diabetes technology & therapeutics. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.