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My Experience Using Threshold Suspend

My Experience Using Threshold Suspend | The LOOP Blog

Now that I’ve been using my MiniMed 530G with Enlite for more than a year, I wanted to give some thought to my experiences with the Threshold Suspend feature. The short version is I rarely use it. However, the short version leaves out the most important parts of the story, so bear with me as I tell you the long version.

In most cases, if I have a low, I treat it and my blood sugar comes back up long before my CGM sensor reaches the level that would cause Threshold Suspend to kick in. This is because my Low Predicted alert is set to alert me before my sensor reaches the low level I’ve set. Then, my pump will alert me when my sensor actually hits my low threshold, so most of the time, I have time to confirm the sensor reading with a fingerstick and treat my low before I get to the suspend level. And I usually do, because low symptoms are not fun and I definitely want to treat that low and get on with my life!

But yes, there are times when Threshold Suspend does kick in. When it does, I usually check my blood sugar and treat my low and when I feel safe, I’ll cancel the suspend and let the insulin resume. There is one big exception to this though, and that exception is shopping! Shopping tends to bring on lows for me, even when I’ve taken preventative measures, such as having a snack or setting a lower temp basal prior to shopping. Something about the steady walking (and the excitement of hunting down a great bargain?) makes my blood sugar dip every time. So often, I’ll treat the low, but also let my pump suspend my insulin, especially if I’m shopping alone and have to drive myself home. I just feel a lot safer that way. I’d much rather end up with a higher-than-ideal blood sugar I can correct when I get home than risk having a low blood sugar when I’m behind the wheel of my car.

I’m also grateful for Threshold Suspend during those middle of the night lows. I’m a very light sleeper, so I always hear my low alarm go off during the night. However, I don’t always have the best judgment when I’m half-asleep. I also don’t always have the best judgment when I’m low. So put the two together and I find myself ignoring the low alarms in favor of more sleep. In the light of day, that scares me and seems really stupid, so I’m trying to work on breaking this bad habit. But in the meantime, I really appreciate knowing Threshold Suspend will suspend insulin for up to two hours if the sensor hits my pre-set low level and I don’t respond to that alarm. And honestly, the piercing squeal of Threshold Suspend usually clears some of the grogginess in my head and gets me up to check my blood sugar with a fingerstick and deal with my low blood sugar.

So that’s the full story of my Threshold Suspend experience. I don’t need to use it often, but I sure am glad that I have it when I do need it!

Important Safety Information

Medtronic Diabetes insulin infusion pumps, continuous glucose monitoring systems and associated components are limited to sale by or on the order of a physician and should only be used under the direction of a healthcare professional familiar with the risks associated with the use of these systems. MiniMed 530G with Enlite is intended for the delivery of insulin and continuous glucose monitoring for the management of diabetes mellitus by persons 16 years of age or older who require insulin.

Pump therapy is not recommended for people who are unwilling or unable to perform a minimum of four blood glucose tests per day. Insulin pumps use rapid-acting insulin. If your insulin delivery is interrupted for any reason, you must be prepared to replace the missed insulin immediately.

The information provided by CGM systems is intended to supplement, not replace, blood glucose information obtained using a home glucose meter. A confirmatory fingerstick is required prior to making adjustments to diabetes therapy. MiniMed 530G with Enlite is not intended to be used directly for preventing or treating hypoglycemia but to suspend insulin delivery when the user is unable to respond to the Threshold Suspend alarm and take measures to prevent or treat hypoglycemia themselves.

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WARNING: The Threshold Suspend feature will cause the pump to temporarily suspend insulin delivery for two hours when the sensor glucose reaches a set threshold. Under some conditions of use the pump can suspend again resulting in very limited insulin delivery. Prolonged suspension can increase the risk of serious hyperglycemia, ketosis, and ketoacidosis. Before using the Threshold Suspend feature, it is important to read the Threshold Suspend information in the MiniMed 530G System User Guide and discuss proper use of the Threshold Suspend feature with your healthcare provider.

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