Select a laboratory test
Detailed ranges, interpretation, differential considerations, interferences, related tests, and follow-up questions will appear here.
A-to-Z laboratory library
Laboratory lookup
Search by test name, abbreviation, alias, specimen, category, or clinical concept.
Quick lookup
Recently viewed
Viewed tests will appear here.
Multi-result interpretation workspace
Laboratory panel dashboard
Paste many results at once to identify high, low, within-range, target-range, urgent, unmatched, and context-dependent findings. Use the range printed on the report whenever available.
Patient and collection context
Context is used only to choose among age-, sex-, pregnancy-, fasting-, or timing-specific intervals. Do not enter a name, birth date, record number, or other identifier.
Blank quick-entry templates
These templates contain test names, blank value prompts, and commonly reported units. They do not contain example patient results.
Example panels:
Accepted examples
Potassium 5.8 mmol/L (3.5-5.0) H
Hemoglobin | 10.4 | g/dL | 12.0 | 15.0 | L
DAT positive
Test | Result | Unit | Low | High | Flag
All matching and calculations occur in the browser. No patient identifiers are needed.
Longitudinal laboratory analysis
Serial laboratory trend analyzer
Calculate net direction, absolute and percentage change, linear velocity, trend fit, interval crossings, doubling or halving time, and optional biological-variation significance.
Optional browser-saved local laboratory policy
Use values from your reporting laboratory. These entries remain only in this browser and take precedence over embedded reference intervals.
No local policy saved for this test and unit.
| Date and time | Value | Actions |
|---|
Optional biological variation and RCV
Enter assay analytical variation (CVa) and within-person biological variation (CVi) from a validated source. The tool calculates RCV = sqrt(2) x Z x sqrt(CVa^2 + CVi^2).
The database does not embed a universal CVi or CVa table. Verify the estimates for the analyte, specimen, method, population, and intended use.
Interpretation safeguards
- Confirm that all values use the same analyte, specimen, method, and unit.
- Account for timing, fasting, posture, hydration, treatment, acute illness, and specimen quality.
- Use an assay-specific absolute delta when required, particularly for cardiac troponin.
- Do not equate a statistically significant RCV with clinical importance.
- Urgent symptoms or critical results require direct clinical action, not trend-tool review.
Trend visualization
Clinical interpretation prompts
Differential diagnosis support
Common disease-state laboratory patterns
Browse usual laboratory constellations or enter observed high, low, positive, or normal findings to rank compatible patterns.
Select a disease-state pattern
Typical findings, competing diagnoses, follow-up questions, and urgent features will appear here.
Pattern matcher
Selecting a condition automatically loads every finding from its usual laboratory pattern below. You can then modify the rows to compare a patient's observed directions. Rankings indicate compatibility only and are not diagnoses.
Bidirectional conventional and SI units
Laboratory unit converter
Choose a reviewed linear route or formula conversion. Reverse calculation is automatic.
Result-
Important conversion cautions
- Confirm analyte identity and exact unit prefixes before converting.
- Enzyme activity routes are unit conversions, not reference interval harmonization.
- Do not use a fixed mass-to-molar conversion for lipoprotein(a); apo(a) isoform size causes material variation.
- HbA1c formula conversions relate percent, mmol/mol, and estimated average glucose. They should not replace the reported laboratory result.
Calculated laboratory relationships
Derived laboratory tools
Frequently used calculations are grouped here for rapid review. Each card states the formula and limitations.
0 toolsUse the reporting laboratory units and clinical context.
Albumin-corrected calcium intentionally omitted
Routine albumin-adjusted calcium reporting is not included because contemporary guidance favors direct ionized-calcium measurement when total calcium may be misleading. Use appropriate specimen handling and the reporting laboratory's method-specific interval.
Methods, privacy, and deployment
How to use this testing build
Use the reporting laboratory's interval and local notification policy before applying any result to patient care.
Reference-data model
Version 2.4 preserves the v1.9 clinical database and separates active reference intervals, decision categories, therapeutic ranges, action values, and illustrative critical thresholds. These concepts are not interchangeable.
- Reference data available: one or more structured intervals or clinical decision categories are available for the stated context.
- Use reporting-laboratory interval: the test is too method-, population-, or specimen-dependent for a transferable numeric interval.
- Assay or component specific: interpretation depends on the exact component, method, categorical result, or protocol.
- Retired or replaced test: the entry is retained for terminology and older-report interpretation, with a current replacement linked when available.
Panel dashboard range selection
The dashboard uses the interval or target printed on the pasted report first. If no range is pasted but an H, L, normal, or critical flag is present, that reporting-laboratory flag controls the panel status. A range entered for the current review, a browser-saved local range, or an eligible database interval may otherwise be used in that order.
Age, sex, pregnancy, fasting, and collection timing can resolve context-specific intervals. Common table header rows are ignored. Duplicate analytes remain visible but are excluded from automatic secondary calculations. When the applicable range still cannot be selected safely, the dashboard asks for context or the report range instead of guessing.
Serial analysis methods
Velocity is estimated by ordinary least-squares regression against elapsed days. R-squared describes linear fit, not causality or clinical validity. Doubling or halving time uses log-linear regression and is shown only for positive values.
Reference change value is calculated only when the user supplies analyte-, specimen-, population-, and method-appropriate CVa and CVi. Without valid RCV inputs or another validated delta rule, direction, velocity, and percentage change remain descriptive.
Reference-interval limitations
The tool displays a general interval only when the analyte and context can be represented safely. Method, specimen, age, sex, posture, collection timing, calibration, and local validation can change the reported range.
When a transferable interval is not appropriate, the profile explains the required assay or clinical context and directs the user to the reporting laboratory's current interval.
Local data and privacy
Entered laboratory values are processed in the browser. Favorites and optional local intervals are stored only in the browser's local storage. Do not enter names, dates of birth, record numbers, or other direct identifiers.
Keyboard and profile tools
Press / outside a form field to jump to laboratory search. Each profile can be copied, printed, transferred to serial analysis, or connected to a supported unit conversion.
Deployment
Upload the complete folder to /blogCalcs/lab-reference-analyzer/. All application JavaScript remains inside the hosted PHP application. Use the included plain iframe snippet in WordPress.