94129-4
LOINC Code
| LOINC code | 94129-4 | ||||||||||||||||||||||||||||||||||||||
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| name | |||||||||||||||||||||||||||||||||||||||
| description | A water deprivation test is used to help diagnose diabetes insipidus (DI) and differentiate between different forms of DI and other disorders such as primary polydipsia. In the first phase of the test, the body's response to fluid fasting is measured with a series of timed urine osmolality +/- serum/plasma analyte measurements. The exact analytes that are measured and the timing depends on the protocol used. At the end of the first phase, if the patient has not developed significant dehydration or hyperosmolarity (in which case the testing would be stopped), the second phase of testing is begun. The second phase involves assessing the body's response to a dose of vasopressin and helps differentiate between central and nephrogenic DI. | ||||||||||||||||||||||||||||||||||||||
| status | ACTIVE | ||||||||||||||||||||||||||||||||||||||
Fully-Specified Name | |||||||||||||||||||||||||||||||||||||||
| component | Water deprivation challenge panel | ||||||||||||||||||||||||||||||||||||||
| property | - | ||||||||||||||||||||||||||||||||||||||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||||||||||||||||||||||||||||||||||||||
| system | Urine+Ser/Plas Ser = Serum Plas = Plasma | ||||||||||||||||||||||||||||||||||||||
| scale | - | ||||||||||||||||||||||||||||||||||||||
| method | |||||||||||||||||||||||||||||||||||||||
Additional Names | |||||||||||||||||||||||||||||||||||||||
| short name | CHEMISTRY.CHALLENGE TESTING; Pan; PANEL.CHALLENGE; Panl; Pl; Plasma; Plsm; Pnl; Point in time; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UA; UR; Ur+SerPl; Urn; Water deprivation Pnl | ||||||||||||||||||||||||||||||||||||||
Basic Attributes | |||||||||||||||||||||||||||||||||||||||
| class | PANEL.CHAL | ||||||||||||||||||||||||||||||||||||||
| type | 1 Laboratory | ||||||||||||||||||||||||||||||||||||||
| order vs. observation | Water deprivati | ||||||||||||||||||||||||||||||||||||||
Panel Components | |||||||||||||||||||||||||||||||||||||||
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History/Usage | |||||||||||||||||||||||||||||||||||||||
| first released | |||||||||||||||||||||||||||||||||||||||
| last updated | 2.67 | ||||||||||||||||||||||||||||||||||||||
| last change type | ADD - added | ||||||||||||||||||||||||||||||||||||||
Related Names | |||||||||||||||||||||||||||||||||||||||
Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.
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