MOISSCode Language Guide

Protocols

Every MOISSCode program contains one or more protocols - named blocks of clinical logic.

protocol SepsisScreen {
    input: Patient p;
    // statements go here
}

Patient Input

Protocols declare patient inputs. The engine provides a default patient or accepts one via the API.

input: Patient p;

Core Fields (Always Available)

Field	Type	Default	Description
name	str	"Unknown"	Patient name
age	int	0	Age in years
weight	float	0.0	Weight (kg)
height	float	170.0	Height (cm)
sex	str	"U"	"M", "F", or "U"
bp	float	120.0	Systolic BP (mmHg)
diastolic_bp	float	80.0	Diastolic BP (mmHg)
hr	float	80.0	Heart rate (bpm)
rr	float	16.0	Respiratory rate
temp	float	37.0	Temperature (°C)
spo2	float	98.0	O₂ saturation (%)
gcs	int	15	Glasgow Coma Scale
lactate	float	1.0	Lactate (mmol/L)

Computed Properties

• p.map - Mean Arterial Pressure (auto-calculated from bp and diastolic_bp)
• p.bmi - Body Mass Index (auto-calculated from weight and height)

Extensible Fields

The Patient type supports any additional field via the Python SDK:

from moisscode.typesystem import Patient

p = Patient(
    name="Jane", age=62, bp=90,
    creatinine=2.4,       # Extended field
    platelets=85,         # Extended field
    pao2_fio2=180,        # Extended field
    on_vasopressors=True  # Extended field
)

print(p.creatinine)  # 2.4  - accessed like any core field

tip

Extended fields are used by advanced scoring systems (e.g., SOFA score uses platelets, bilirubin, creatinine, pao2_fio2). You can add any clinical data you need.

Variables

let score = med.scores.qsofa(p);
let drugs = ["Vancomycin", "Meropenem"];
let threshold = 2.0;

Conditionals

if score >= 2 {
    alert "High risk" severity: critical;
} else {
    alert "Stable" severity: info;
}

Operators: >, <, >=, <=, ==, !=, and, or, not

Loops

While Loop

let counter = 0;
while counter < 5 {
    let counter = counter + 1;
}

For-Each Loop

let drugs = ["A", "B", "C"];
for drug in drugs {
    alert drug severity: info;
}

Safety limit: 1000 iterations maximum.

Drug Administration

administer Norepinephrine dose: 0.1 mcg/kg/min;

The MOISS classifier automatically categorizes timing (PROPHYLACTIC, ON_TIME, PARTIAL, MARGINAL, FUTILE, TOO_LATE).

Tracking with KAE

Track a patient value using the Kalman-Autoencoder estimator:

track p.lactate using KAE;

Alerts

alert "Sepsis protocol activated" severity: critical;
alert "Monitoring" severity: info;

Severity levels: critical 🚨, warning ⚠️, info ℹ️

Clinical Assessment

assess p for sepsis;

Automatically calculates qSOFA and assigns risk level (HIGH / MODERATE / LOW).

Custom Types

Define domain-specific data structures:

type Bacteria {
    name: str;
    mic: float;
    resistant: bool;
}

type MDRBacteria extends Bacteria {
    resistance_genes: str;
}

Create instances:

let ecoli = Bacteria { name: "E.coli", mic: 0.5, resistant: false };

Functions

function is_resistant(mic, breakpoint) {
    if mic > breakpoint {
        return true;
    }
    return false;
}

let result = is_resistant(2.0, 1.0);

Lists

let panel = ["Vancomycin", "Meropenem", "Ceftriaxone"];
let first = panel[0];

Library Calls

All 20 modules are accessed via the med. prefix:

let score = med.scores.qsofa(p);
med.io.infuse("Pump_01", "Norepinephrine", 0.1);
med.finance.bill("99291", "Critical Care");

Comments

// This is a single-line comment

Imports

import med.biochem;
import med.lab;