Basal deliveryType: suspend

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NB: All fields are required unless otherwise noted.

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type

[ingestion, storage, client] The string basal.

QUICK SUMMARY
Required:
    jellyfish: yes
    platform: yes

deliveryType

[ingestion, storage, client] The string suspend.

QUICK SUMMARY
Required:
    jellyfish: yes
    platform: yes

This is the sub-type of basal event that represents the total suspension of insulin delivery on an insulin pump within the stream of basal events, which should in the vast majority of cases be contiguous—that is, without gaps or overlaps. The user's inputs to suspend (and, later, resume) insulin delivery are part of Tidepool's deviceEvent data type, as the sub-type status. Every interval that starts with a suspension of insulin delivery and ends with the resumption of insulin delivery is also represented as a suspend basal, documented here. This makes the calculation of statistics like total basal dose per day far easier.

Note, however, that no rate field appears on suspend basal events. The rate is always zero, and so this redundant information is not specified.

duration

This field is optional when ingesting data through the jellyfish service but required when ingesting data through the new platform APIs.

[ingestion, storage, client] An integer value representing a duration of time in milliseconds.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: yes
Numerical type: Integer value representing milliseconds.
Range:
    min: 0
    max: 86400000

Just like scheduled basals, when ingesting through the legacy jellyfish ingestion service, duration is optional because jellyfish also uses the sequence of basal events to determine their durations - see previous for details.

In Tidepool's new platform APIs (under active development as of April, 2016 at the time of the initial drafting of this document), the duration field will be required on all basals, including suspend basals, placing the burden on the client to determine the length of the interval between any pair of suspension and resumption of insulin delivery events that together define a suspend basal. (On only one insulin pump that we know of are suspensions of insulin delivery programmed for a set length of time upfront, like temp basals; in such cases, obviously, it is easy to provide the duration for the suspend basal.)

The new platform APIs expect this value to be >= 0 and <= 86400000 (the number of milliseconds in twenty-four hours), as no pump manufacturer that we know of currently allows the programming of a temporary basal rate for longer than twenty-four hours.

expectedDuration

This field is optional. At present, it is only added by the jellyfish data ingestion service.

[storage, client] An integer value representing an original programmed duration of time in milliseconds, copied from the duration field on ingestion when a following event has resulted in truncation of the original programmed duration.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: no (optional)
Numerical type: Integer value representing milliseconds.
Range:
    min: >= `duration`
    max: 86400000

Changelog for expectedDuration

_schemaVersion ? (future): expectedDuration is implemented as described in this documentation. If the _schemaVersion listed here is "? (future)," all data up to and including the current _schemaVersion has not implemented expectedDuration as described.

Refer to the discussion of expectedDuration in the temp basal documentation. The only case where we may be able to implement expectedDuration for suspend basals in the future is the rare case of insulin pumps that require setting a duration for a suspension of insulin delivery upfront instead of providing a simple toggle between suspended and resumed insulin delivery status on the pump.

previous

This field is optional when ingesting data through the jellyfish service but will no longer exist when ingesting data through the new platform APIs.

[ingestion] An object representing the basal event just prior to this event or, equivalently, just the id of said object.

[storage, client] This field does not appear, as it is only used in processing during ingestion and not stored.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: nonexistent

See previous for detailed documentation on this deprecated field.

suppressed

This field is optional.

[ingestion, storage, client] An object representing another basal event - namely, the event that is currently suppressed (inactive) because this suspend basal is in effect.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: no (optional)

May contain—only!—the following properties:

  • type
  • deliveryType
  • percent
  • rate
  • scheduleName
  • suppressed

suppressed.type

[ingestion, storage, client] The string basal.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: yes

suppressed.deliveryType

[ingestion, storage, client] A string—either scheduled or temp—encoding the deliveryType of the currently suppressed basal event.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: yes
Range: Must be one of:
    `scheduled`
    `temp`

suppressed.percent

This field is optional.

[ingestion, storage, client] A floating point number >= 0 representing a percentage multiplier of the current basal rate to obtain the temp rate in units per hour.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: no (optional)
Numerical type: Floating point value representing a percentage, where 1.0 represents 100%.
Range:
    min: 0.0
    max: 10.0

suppressed.rate

[ingestion, storage, client] A floating point number >= 0 representing the amount of insulin delivered in units per hour.

QUICK SUMMARY
Required:
    jellyfish: yes
    platform: yes
Numerical type: Floating point value rounded to the appropriate significant figures for the device's precision.
Range:
    min: 0.0
    max: 20.0

suppressed.scheduleName

This field is optional.

[ingestion, storage, client] A string: the name of the basal schedule.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: no (optional)

suppressed.suppressed

This field is optional.

[ingestion, storage, client] A nested object representing another basal event suppressed by the also-suppressed current basal event.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: no (optional)

See the discussion of the suppressed field on temp basals.

The only differences for suspend basals are that:

  • The deliveryType of the embedded suppressed basal may be either temp or scheduled.
  • The embedded suppressed basal may itself have an embedded suppressed basal event. This can happen in particular with insulin pumps integrated with continuous glucose monitors such that the following may happen: (a) the PWD blood glucose is falling, and he or she (or a caregiver) programs a temp basal (which embeds a suppressed scheduled basal) in an attempt to prevent hypoglycemia but (b) the PWD's blood glucose continues to fall, and the automatic low glucose suspend feature of the insulin pump suspends insulin delivery, creating a suspend basal that embeds the temp basal as its suppressed.

Also see the full explanation of suppressed (including the tracking of suppressed for temp and suspend basals that cross one or more basal schedule boundaries) for further information, explanations, and examples.

clockDriftOffset

See common fields.

conversionOffset

See common fields.

deviceId

See common fields.

deviceTime

See common fields.

time

See common fields.

timezoneOffset

See common fields.

uploadId

See common fields.

_active

See common fields.

_groupId

See common fields.

_schemaVersion

See common fields.

_version

See common fields.

createdTime

See common fields.

guid

See common fields.

id

See common fields.

example (client)

{
    "type": "basal",
    "deliveryType": "suspend",
    "duration": 10800000,
    "expectedDuration": 12960000,
    "suppressed": {
        "type": "basal",
        "deliveryType": "scheduled",
        "scheduleName": "Stress",
        "rate": 1.05
    },
    "clockDriftOffset": 0,
    "conversionOffset": 0,
    "deviceId": "DevId0987654321",
    "deviceTime": "2018-05-14T18:00:00",
    "guid": "f9623fae-217c-47e1-a49c-85b7a9bca8ac",
    "id": "ba1027905672484babe56579f9291204",
    "time": "2018-05-14T08:00:00.000Z",
    "timezoneOffset": 600,
    "uploadId": "SampleUploadId"
}

example (ingestion)

{
    "type": "basal",
    "deliveryType": "suspend",
    "duration": 86400000,
    "expectedDuration": 103680000,
    "suppressed": {
        "type": "basal",
        "deliveryType": "scheduled",
        "scheduleName": "Very Active",
        "rate": 1.55
    },
    "clockDriftOffset": 0,
    "conversionOffset": 0,
    "deviceId": "DevId0987654321",
    "deviceTime": "2018-05-14T18:00:00",
    "time": "2018-05-14T08:00:00.000Z",
    "timezoneOffset": 600,
    "uploadId": "SampleUploadId"
}

example (storage)

{
    "type": "basal",
    "deliveryType": "suspend",
    "duration": 34200000,
    "expectedDuration": 41040000,
    "suppressed": {
        "type": "basal",
        "deliveryType": "scheduled",
        "scheduleName": "Weekday",
        "rate": 1.525
    },
    "_active": true,
    "_groupId": "abcdef",
    "_schemaVersion": 0,
    "_version": 0,
    "clockDriftOffset": 0,
    "conversionOffset": 0,
    "createdTime": "2018-05-14T08:00:05.000Z",
    "deviceId": "DevId0987654321",
    "deviceTime": "2018-05-14T18:00:00",
    "guid": "f96df9f8-40f4-4f05-a4d4-c27af663ec2e",
    "id": "76b597d3d2354902b6dcd924d58fbd37",
    "time": "2018-05-14T08:00:00.000Z",
    "timezoneOffset": 600,
    "uploadId": "SampleUploadId"
}

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