Bolus subType: dual/square

Jump to...(notable fields on this type)

NB: All fields are required unless otherwise noted.

Jump to example JSON:

type

[ingestion, storage, client] The string bolus.

QUICK SUMMARY
Required:
    jellyfish: yes
    platform: yes

subType

[ingestion, storage, client] The string dual/square.

QUICK SUMMARY
Required:
    jellyfish: yes
    platform: yes

Changelog for subType

_schemaVersion ? (future): We plan to migrate from dual/square to combo in the future.

This is the sub-type of bolus event that represents a bolus insulin dose programmed to deliver part of the dose using the immediate delivery strategy (a normal bolus) and the remainder using the delivery spread evenly over a duration strategy (a square bolus). The data model is essentially just a combination of the models for normal and square boluses.

Most (and perhaps all) insulin pumps ask the user to divide the normal and square portions of a dual/square bolus by percentage of the total insulin dose. We do not encode this programmed percentage directly, but it is recoverable (for surfacing in a client application's UI) through computation using the appropriate combination of values from the normal, extended, expectedNormal, and expectedExtended fields and/or the appropriate sum of these.

We plan to migrate all Tidepool data to use combo as the value of this sub-type rather than dual/square in order to improve the transparency of the data model and avoid / in a subType string.

normal

[ingestion, storage, client] A floating point value representing units of insulin.

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: 100.0

See the explanation of this field in the documentation for normal boluses.

Note that a 0 for normal is allowable in more circumstances for a combo bolus than for a simple normal bolus: as long as the extended is non-zero for the combo bolus, normal may have a value of 0 without the requirement that a non-zero expectedNormal also be present.

expectedNormal

This field is optional.

[ingestion, storage, client] A floating point value representing units of insulin.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: no (optional)
Numerical type: Floating point value rounded to the appropriate significant figures for the device's precision.
Range:
    min: > `normal`
    max: 100.0

See the explanation of this field in the documentation for normal boluses.

Note that if a dual/square bolus is interrupted or canceled during the normal portion of delivery, by definition the extended delivery should not yet have begun, so the value of extended and duration should be 0 and expectedExtended and expectedDuration should have values.

extended

[ingestion, storage, client] A floating point value representing units of insulin.

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: 100.0

See the explanation of this field in the documentation for square boluses.

expectedExtended

This field is optional.

[ingestion, storage, client] A floating point value representing units of insulin.

QUICK SUMMARY
Required:
    jellyfish: no (optional)
    platform: no (optional)
Numerical type: Floating point value rounded to the appropriate significant figures for the device's precision.
Range:
    min: > `extended`
    max: 100.0

See the explanation of this field in the documentation for square boluses.

Note that if a dual/square bolus is interrupted or canceled during the extended portion of delivery, by definition the normal delivery should have completed successfully, so the expectedNormal field should not have a value. An example of this type of interruption appears below in the examples.

duration

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

QUICK SUMMARY
Required:
    jellyfish: yes
    platform: yes
Numerical type: Integer value representing milliseconds.
Range:
    min: 0
    max: 86400000

See the explanation of this field in the documentation for square boluses.

As with square boluses, the duration is the elapsed time for the extended portion of the bolus. While some insulin pumps that deliver normal insulin doses at a slower rate (minutes rather than seconds) for user comfort do include the duration of the normal delivery in the data, we do not currently include this information in our bolus data model(s). As with the square boluses, it is in theory possible for a user to input 0 duration for the extended portion of a combo bolus, effectively programming a normal bolus in a total amount equal to the normal and extended insulin values added together.

expectedDuration

This field is optional.

[ingestion, storage, client] An integer value representing an original programmed duration of time in milliseconds when the programmed event did not complete due to interruption or user cancellation.

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

See the explanation of this field in the documentation for square boluses.

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": "bolus",
    "subType": "dual/square",
    "normal": 6.25,
    "extended": 5.75,
    "expectedExtended": 8.625,
    "duration": 23400000,
    "expectedDuration": 35100000,
    "clockDriftOffset": 0,
    "conversionOffset": 0,
    "deviceId": "DevId0987654321",
    "deviceTime": "2018-05-14T18:17:07",
    "guid": "dc114f19-74fe-4075-9676-38faec7cf0cc",
    "id": "d184a41eaf984afcbe553071f80bcdec",
    "time": "2018-05-14T08:17:07.035Z",
    "timezoneOffset": 600,
    "uploadId": "SampleUploadId"
}

example (ingestion)

{
    "type": "bolus",
    "subType": "dual/square",
    "normal": 9.25,
    "extended": 5.5,
    "expectedExtended": 8.25,
    "duration": 57600000,
    "expectedDuration": 86400000,
    "clockDriftOffset": 0,
    "conversionOffset": 0,
    "deviceId": "DevId0987654321",
    "deviceTime": "2018-05-14T18:17:07",
    "time": "2018-05-14T08:17:07.035Z",
    "timezoneOffset": 600,
    "uploadId": "SampleUploadId"
}

example (storage)

{
    "type": "bolus",
    "subType": "dual/square",
    "normal": 2.25,
    "extended": 9.5,
    "expectedExtended": 14.25,
    "duration": 48600000,
    "expectedDuration": 72900000,
    "_active": true,
    "_groupId": "abcdef",
    "_schemaVersion": 0,
    "_version": 0,
    "clockDriftOffset": 0,
    "conversionOffset": 0,
    "createdTime": "2018-05-14T08:17:12.035Z",
    "deviceId": "DevId0987654321",
    "deviceTime": "2018-05-14T18:17:07",
    "guid": "cf850a7a-1f28-4bbc-8a56-36cbe0326f20",
    "id": "4f8b8b133b22401aa1f281be9eb954ad",
    "time": "2018-05-14T08:17:07.035Z",
    "timezoneOffset": 600,
    "uploadId": "SampleUploadId"
}

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