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Minimed 640g Insulin Flow Blockage Repeatedly - Help!
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<blockquote data-quote="IanRA" data-source="post: 1248079" data-attributes="member: 331164"><p>Hi, I am having repeated problems with Insulin Flow Blockage warnings with my relatively new Minimed 640G. This has become actually quite life threatening on a couple of occasions, especially when it occurs while I am asleep and awake to find my BGL off the scale. I reported this to Medtronics, who then asked all the usual diagnostic questions and had a complete history of the pump failure. They sent me a new pump. Meanwhile, I reverted to my Medtronics Minimed 722G, which has never let me down, in spite of 8 years of continuous service. The replacement 640G is again showing the same issues.</p><p></p><p>There are other issues here too. But I think I can eliminate one of them. At the suggestion of my diabetic educator I replaced the Silhouette infusion sets with the Mio. The Mio does not have the robust anti-kink tubing of the Silhouette, the tube is hollow whereas the Silhouette tubing has plastic threads internally which prevent blockage with kinking. The other problem with the Mio is the tendency for the plastic cannula to fail entry into the skin. Indeed the insertion needle will at times penetrate the cannula. (Photo's attached). This inspite of careful preparation and attention to detail when inserting. I don't know why this happens but others report similar issues. (Photo attached).</p><p></p><p>But, the 640G blocks regardless of this issue. Currently I am using the 6mm version, as I do not carry a lot of body fat and need the 9mm.</p><p></p><p>So, I am going to report this issue to the authorities and will see what transpires. I see from other correspondents both on this and on other fora that this problem is not uncommon.</p><p></p><p>While the Minimed 640G is pretty, and a tiny bit smaller than the 722, I think it may have a design or configuration problem because the 722 just doesn't have the same issues (for me, at least).</p></blockquote><p></p>
[QUOTE="IanRA, post: 1248079, member: 331164"] Hi, I am having repeated problems with Insulin Flow Blockage warnings with my relatively new Minimed 640G. This has become actually quite life threatening on a couple of occasions, especially when it occurs while I am asleep and awake to find my BGL off the scale. I reported this to Medtronics, who then asked all the usual diagnostic questions and had a complete history of the pump failure. They sent me a new pump. Meanwhile, I reverted to my Medtronics Minimed 722G, which has never let me down, in spite of 8 years of continuous service. The replacement 640G is again showing the same issues. There are other issues here too. But I think I can eliminate one of them. At the suggestion of my diabetic educator I replaced the Silhouette infusion sets with the Mio. The Mio does not have the robust anti-kink tubing of the Silhouette, the tube is hollow whereas the Silhouette tubing has plastic threads internally which prevent blockage with kinking. The other problem with the Mio is the tendency for the plastic cannula to fail entry into the skin. Indeed the insertion needle will at times penetrate the cannula. (Photo's attached). This inspite of careful preparation and attention to detail when inserting. I don't know why this happens but others report similar issues. (Photo attached). But, the 640G blocks regardless of this issue. Currently I am using the 6mm version, as I do not carry a lot of body fat and need the 9mm. So, I am going to report this issue to the authorities and will see what transpires. I see from other correspondents both on this and on other fora that this problem is not uncommon. While the Minimed 640G is pretty, and a tiny bit smaller than the 722, I think it may have a design or configuration problem because the 722 just doesn't have the same issues (for me, at least). [/QUOTE]
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