Source: https://guthlabs.ai/docs/instruments/iv-drip-rate-calculator/implementation/

instrument implementation / implementation-contract

# IV Drip Rate Calculator implementation

A source-bound implementation contract for IV Drip Rate Calculator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t4-050

**Effect**: Computation or source lookup only

## Input and validation requirements

Yes. A zero-time input creates undefined divisions and must be rejected. An unlabeled time value creates a convention hazard with a 60-fold rate discrepancy between minutes and hours.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "volume_ml": 1000,
    "time": 8,
    "time_unit": "hr",
    "drop_factor_gtt_per_ml": 15,
    "calculate": [
      "gtt/min",
      "mL/hr"
    ]
  },
  "expected_outputs": {
    "gtt_per_min": 31.25,
    "ml_per_hr": 125
  },
  "working": "Convert time: 8 hr × 60 min/hr = 480 min. gtt/min = (1000 mL × 15 gtt/mL) ÷ 480 min = 15000 ÷ 480 = 31.25 gtt/min. mL/hr = 1000 mL ÷ 8 hr = 125 mL/hr."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/iv-drip-rate-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/iv-drip-rate-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/iv-drip-rate-calculator/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche4/tranche4-results.json`