{"id":1815,"date":"2018-11-13T17:23:16","date_gmt":"2018-11-13T16:23:16","guid":{"rendered":"http:\/\/samjwatkins.com\/blog\/?p=1815"},"modified":"2020-02-13T14:02:47","modified_gmt":"2020-02-13T13:02:47","slug":"closing-the-loop","status":"publish","type":"post","link":"https:\/\/samjwatkins.com\/blog\/?p=1815","title":{"rendered":"Closing the loop"},"content":{"rendered":"

I\u2019ve been using tools and mathematical models to establish my insulin requirements for a while.\u00a0 I keep the links to these calculators on my pump pages<\/a> and thank my lucky stars for first wifi and then 3 and then 4G mobile networks.<\/p>\n

Most of them I have produced myself while allowing them to be tailored for any other insulin user.<\/p>\n

The most useful one, IMO, is the basal rate estimator<\/a>.\u00a0 By fasting (and testing) you can tweak your basal rate in the tool until you get a smooth line. It\u2019s a beautiful piece of code.\u00a0 It\u2019s also why I use my Roche pump as it has a basal programme that sets the amount of insulin I have each hour.<\/p>\n

I use a simple spreadsheet to record my basal and the blood sugar results and do the comparison.<\/p>\n

But it is not closing the loop.<\/p>\n

For me, using interstitial readings with a subcutaneous pump is not closing the loop because the insulin I had 3 hours and 57 minutes ago, whether by basal or by bolus, is having an impact now.\u00a0 If I stop my pump, it is going to hurt me in an hour\u2019s time and that impact will last for four hours.<\/p>\n

That\u2019s if the interstitial readings are correct.\u00a0 The sensor is not meant to be used for clinical decisions.\u00a0 Indeed, if I get an unexpected result, I do a capillary blood test to see what is actually happening now rather than 10 minutes ago.<\/p>\n

Time is the killer?<\/h2>\n

Exactly.\u00a0 I would be happy if my pump were not a constant subcutaneous insulin infusion (CSII) pump but a CIPII (continous IntraPeritoneal insulin infusion) could allow the loop to be properly closed.\u00a0 The Accu-Chek Diaport<\/a> looks really interesting for that \u2013 with the insulin going straight into the stomach wall rather than subcutaneously.\u00a0 The action of the insulin is sharpened considerably because the insulin isn\u2019t going into fat.<\/p>\n

It\u2019s not quite as good as IV, but it would be enough to close the loop easily.<\/p>\n","protected":false},"excerpt":{"rendered":"

I\u2019ve been using tools and mathematical models to establish my insulin requirements for a while.\u00a0 I keep the links to these calculators on my pump pages and thank my lucky stars for first wifi and then 3 and then 4G mobile networks. Most of them I have produced myself while allowing them to be tailored […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-1815","post","type-post","status-publish","format-standard","hentry","category-type-1-diabetes"],"yoast_head":"\nClosing the loop - Finding the chase and cutting to it<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/samjwatkins.com\/blog\/?p=1815\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Closing the loop - Finding the chase and cutting to it\" \/>\n<meta property=\"og:description\" content=\"I\u2019ve been using tools and mathematical models to establish my insulin requirements for a while.\u00a0 I keep the links to these calculators on my pump pages and thank my lucky stars for first wifi and then 3 and then 4G mobile networks. Most of them I have produced myself while allowing them to be tailored […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/samjwatkins.com\/blog\/?p=1815\" \/>\n<meta property=\"og:site_name\" content=\"Finding the chase and cutting to it\" \/>\n<meta property=\"article:published_time\" content=\"2018-11-13T16:23:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-02-13T13:02:47+00:00\" \/>\n<meta name=\"author\" content=\"Sam J Watkins\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sam J Watkins\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815\"},\"author\":{\"name\":\"Sam J Watkins\",\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/#\\\/schema\\\/person\\\/b001c9aecccd284b29f0d69e10c68af5\"},\"headline\":\"Closing the loop\",\"datePublished\":\"2018-11-13T16:23:16+00:00\",\"dateModified\":\"2020-02-13T13:02:47+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815\"},\"wordCount\":340,\"commentCount\":0,\"articleSection\":[\"Diabetes\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815\",\"url\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815\",\"name\":\"Closing the loop - Finding the chase and cutting to it\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/#website\"},\"datePublished\":\"2018-11-13T16:23:16+00:00\",\"dateModified\":\"2020-02-13T13:02:47+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/#\\\/schema\\\/person\\\/b001c9aecccd284b29f0d69e10c68af5\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?p=1815#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/samjwatkins.com\\\/blog\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Closing the loop\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/\",\"name\":\"Finding the chase and cutting to it\",\"description\":\"A collection of thoughts, reactions and general comment\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/#\\\/schema\\\/person\\\/b001c9aecccd284b29f0d69e10c68af5\",\"name\":\"Sam J Watkins\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0f33fed47b6bcd59c4fb4184af075e1f981651c38fd946b5cc6d4ed5ff0e18fd?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0f33fed47b6bcd59c4fb4184af075e1f981651c38fd946b5cc6d4ed5ff0e18fd?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0f33fed47b6bcd59c4fb4184af075e1f981651c38fd946b5cc6d4ed5ff0e18fd?s=96&d=mm&r=g\",\"caption\":\"Sam J Watkins\"},\"description\":\"https:\\\/\\\/www.linkedin.com\\\/in\\\/sam-watkins-6564311\\\/\",\"sameAs\":[\"http:\\\/\\\/samjwatkins.com\"],\"url\":\"https:\\\/\\\/samjwatkins.com\\\/blog\\\/?author=2\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Closing the loop - Finding the chase and cutting to it","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/samjwatkins.com\/blog\/?p=1815","og_locale":"en_GB","og_type":"article","og_title":"Closing the loop - Finding the chase and cutting to it","og_description":"I\u2019ve been using tools and mathematical models to establish my insulin requirements for a while.\u00a0 I keep the links to these calculators on my pump pages and thank my lucky stars for first wifi and then 3 and then 4G mobile networks. Most of them I have produced myself while allowing them to be tailored […]","og_url":"https:\/\/samjwatkins.com\/blog\/?p=1815","og_site_name":"Finding the chase and cutting to it","article_published_time":"2018-11-13T16:23:16+00:00","article_modified_time":"2020-02-13T13:02:47+00:00","author":"Sam J Watkins","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Sam J Watkins","Estimated reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/samjwatkins.com\/blog\/?p=1815#article","isPartOf":{"@id":"https:\/\/samjwatkins.com\/blog\/?p=1815"},"author":{"name":"Sam J Watkins","@id":"https:\/\/samjwatkins.com\/blog\/#\/schema\/person\/b001c9aecccd284b29f0d69e10c68af5"},"headline":"Closing the loop","datePublished":"2018-11-13T16:23:16+00:00","dateModified":"2020-02-13T13:02:47+00:00","mainEntityOfPage":{"@id":"https:\/\/samjwatkins.com\/blog\/?p=1815"},"wordCount":340,"commentCount":0,"articleSection":["Diabetes"],"inLanguage":"en-GB","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/samjwatkins.com\/blog\/?p=1815#respond"]}]},{"@type":"WebPage","@id":"https:\/\/samjwatkins.com\/blog\/?p=1815","url":"https:\/\/samjwatkins.com\/blog\/?p=1815","name":"Closing the loop - Finding the chase and cutting to it","isPartOf":{"@id":"https:\/\/samjwatkins.com\/blog\/#website"},"datePublished":"2018-11-13T16:23:16+00:00","dateModified":"2020-02-13T13:02:47+00:00","author":{"@id":"https:\/\/samjwatkins.com\/blog\/#\/schema\/person\/b001c9aecccd284b29f0d69e10c68af5"},"breadcrumb":{"@id":"https:\/\/samjwatkins.com\/blog\/?p=1815#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/samjwatkins.com\/blog\/?p=1815"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/samjwatkins.com\/blog\/?p=1815#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/samjwatkins.com\/blog"},{"@type":"ListItem","position":2,"name":"Closing the loop"}]},{"@type":"WebSite","@id":"https:\/\/samjwatkins.com\/blog\/#website","url":"https:\/\/samjwatkins.com\/blog\/","name":"Finding the chase and cutting to it","description":"A collection of thoughts, reactions and general comment","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/samjwatkins.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Person","@id":"https:\/\/samjwatkins.com\/blog\/#\/schema\/person\/b001c9aecccd284b29f0d69e10c68af5","name":"Sam J Watkins","image":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/secure.gravatar.com\/avatar\/0f33fed47b6bcd59c4fb4184af075e1f981651c38fd946b5cc6d4ed5ff0e18fd?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/0f33fed47b6bcd59c4fb4184af075e1f981651c38fd946b5cc6d4ed5ff0e18fd?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/0f33fed47b6bcd59c4fb4184af075e1f981651c38fd946b5cc6d4ed5ff0e18fd?s=96&d=mm&r=g","caption":"Sam J Watkins"},"description":"https:\/\/www.linkedin.com\/in\/sam-watkins-6564311\/","sameAs":["http:\/\/samjwatkins.com"],"url":"https:\/\/samjwatkins.com\/blog\/?author=2"}]}},"_links":{"self":[{"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1815","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1815"}],"version-history":[{"count":2,"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1815\/revisions"}],"predecessor-version":[{"id":2246,"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1815\/revisions\/2246"}],"wp:attachment":[{"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samjwatkins.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}