Calculated variables

htdocs/ViewData.vue

@@ -79,7 +79,7 @@
 </style>
 
 <script>
-	import { uniq, groupByArray, quantile_sorted } from './util.mjs';
+	import { uniq, groupByArray, quantile_sorted, inherit } from './util.mjs';
 
 	function isNumeric(x) {
 		return (x !== '') && (x !== false) && (x !== null) && (!isNaN(x));
@@ -133,6 +133,14 @@
 				type: Boolean,
 				default: false
 			},
+			constants: {
+				type: Object,
+				default: {}
+			},
+			calculations: {
+				type: Array,
+				default: []
+			},
 			reports: {
 				type: Array,
 				default: []
@@ -142,8 +150,32 @@
 			return {};
 		},
 		computed: {
+			resultset_all() {
+				return this.resultset_calculated.length > 0 ? this.resultset.concat(this.resultset_calculated) : this.resultset;
+			},
+			resultset_calculated() {
+				var self = this, snapshots = [], results = [], history, update, item;
+				groupByArray(this.resultset, x => x.time).map(group => group.values.reduce(((acc, x) => (acc.values[x.name] = x, acc)), { key: group.key, datehdr: date_header(group.key), values: {}})).sort((a, b) => (a.key > b.key) - (a.key < b.key)).forEach(function(group) {
+					snapshots.push({ key: group.key, values: history = Object.assign(snapshots.length > 0 ? inherit(snapshots[snapshots.length - 1].values) : inherit(self.constants), update = group.values) });
+					history['Time'] = update['Time'] = { time: group.key, value: group.key };
+					for(var i = 0; i < self.calculations.length; ++i) {
+						var calculation = self.calculations[i], deps = calculation.deps;
+						for(var j = deps.length - 1, satisfied = true, updated = false; j >= 0; --j) if(!history[deps[j]]) { satisfied = false; break; }
+						else if(update[deps[j]]) updated = true;
+						if((satisfied) && (updated)) {
+							item = calculation.calc(...calculation.deps.map(x => history[x].value), history[calculation.name] && history[calculation.name].value);
+							if((item !== undefined) && (item !== null)) {
+								results.push(history[calculation.name] = update[calculation.name] = Object.assign({ time: group.key, value: item }, calculation));
+								if((item.hasOwnProperty('rangeL')) && (item.value < item.rangeL)) item.flag = 'L';
+								else if((item.hasOwnProperty('rangeH')) && (item.value > item.rangeH)) item.flag = 'H';
+							}
+						}
+					}
+				});
+				return results;
+			},
 			groups() {
-				if(this.daily) return groupByArray(this.resultset, x => new Date(x.time.getFullYear(), x.time.getMonth(), x.time.getDate())).map(function(group) {
+				if(this.daily) return groupByArray(this.resultset_all, x => new Date(x.time.getFullYear(), x.time.getMonth(), x.time.getDate())).map(function(group) {
 					group = group.values.reduce(((acc, x) => ((acc.values[x.name] || (acc.values[x.name] = [])).push(x), acc)), { key: group.key, datehdr: date_header(group.key), values: {}});
 					for(var k in group.values) if(group.values.hasOwnProperty(k)) {
 						var items = group.values[k].sort((a, b) => a.time - b.time);
@@ -165,10 +197,10 @@
 					}
 					return group;
 				}).sort((a, b) => (a.key > b.key) - (a.key < b.key));
-				else return groupByArray(this.resultset, x => x.time).map(group => group.values.reduce(((acc, x) => (acc.values[x.name] = x, acc)), { key: group.key, datehdr: date_header(group.key), values: {}})).sort((a, b) => (a.key > b.key) - (a.key < b.key));
+				else return groupByArray(this.resultset_all, x => x.time).map(group => group.values.reduce(((acc, x) => (acc.values[x.name] = x, acc)), { key: group.key, datehdr: date_header(group.key), values: {}})).sort((a, b) => (a.key > b.key) - (a.key < b.key));
 			},
 			names() {
-				var res = uniq(this.resultset.map(x => x.name));
+				var res = uniq(this.resultset_all.map(x => x.name));
 				return res.reduce((acc, x) => (acc[x] = true, acc), res);
 			},
 			names_excluded() {
@@ -177,7 +209,7 @@
 				return res;
 			},
 			statistics() {
-				return statistics(this.resultset);
+				return statistics(this.resultset_all);
 			}
 		},
 		watch: {

htdocs/ViewVitalsLabs.vue

@@ -3,8 +3,11 @@
 		<label class="form-check form-check-inline form-switch form-check-label" v-for="report in reports">
 			<input class="form-check-input" type="checkbox" v-model="report.selected" /> {{report.name}}
 		</label>
+		<label class="form-check form-check-inline form-switch form-check-label">
+			<input class="form-check-input" type="checkbox" v-model="calculate" /> Calculate
+		</label>
 	</div>
-	<ViewData :resultset="resultset" :daily="true" :reports="reports_selected" />
+	<ViewData :resultset="resultset" :daily="true" :constants="calculate ? constants : []" :calculations="calculate ? calculations : []" :reports="reports_selected" />
 </template>
 
 <script>
@@ -12,10 +15,19 @@
 
 	import ViewData from './ViewData.vue';
 
+	const time_min = new Date(1700, 0, 1);
+
+	const calculations = [
+		{ name: 'Age', unit: 'yr', deps: ['Time', 'DOB'], calc(Time, DOB, prev) { var x = Math.floor((Time - DOB.getTime())/3.15576e10); return x != prev ? x : undefined; } },
+		{ name: 'BMI', unit: 'kg/m²', rangeL: 18.5, rangeH: 24.9, range: '18.5 - 24.9', deps: ['Ht', 'Wt'], calc: (Ht, Wt) => (10000*Wt/(Ht*Ht)).toPrecision(3) },
+		{ name: 'BSA', unit: 'm²', deps: ['Ht', 'Wt'], calc: (Ht, Wt) => (0.007184*Math.pow(Ht, 0.725)*Math.pow(Wt, 0.425)).toPrecision(3) },
+		{ name: 'CrCl', unit: 'mL/min', deps: ['Age', 'Sex', 'Wt', 'CREATININE'], calc: (Age, Sex, Wt, CREATININE) => (((140 - Age) * Wt)/(72*CREATININE)*(Sex == 'M' ? 1 : 0.85)).toPrecision(4) }
+	];
+
 	const reports = [
-		{ name: 'Vitals', value: ['T', 'P', 'R', 'SBP', 'DBP', 'Pulse Oximetry', 'Wt', 'Ht', 'Pain'], selected: true },
+		{ name: 'Vitals', value: ['T', 'P', 'R', 'SBP', 'DBP', 'Pulse Oximetry', 'Wt', 'Ht', 'BMI', 'BSA', 'Pain'], selected: true },
 		{ name: 'CBC', value: ['HGB', 'MCV', 'PLT', 'WBC', 'NEUTROPHIL#'], selected: false },
-		{ name: 'Renal', value: ['CREATININE', 'UREA NITROGEN', 'EGFR CKD-EPI 2021', 'Estimated GFR dc\'d 3/30/2022'], selected: false },
+		{ name: 'Renal', value: ['CREATININE', 'UREA NITROGEN', 'EGFR CKD-EPI 2021', 'Estimated GFR dc\'d 3/30/2022', 'CrCl'], selected: false },
 		{ name: 'Hepatic', value: ['SGOT', 'SGPT', 'LDH', 'ALKALINE PHOSPHATASE', 'GAMMA-GTP', 'TOT. BILIRUBIN', 'DIR. BILIRUBIN', 'ALBUMIN'], selected: false },
 		{ name: 'Electrolytes', value: ['SODIUM', 'CHLORIDE', 'CO2', 'CALCIUM', 'IONIZED CALCIUM (LABCORP)', 'POTASSIUM', 'MAGNESIUM', 'PO4', 'ANION GAP', 'OSMOBLD'], selected: false },
 		{ name: 'Coagulation', value: ['PT', 'INR', 'PTT'], selected: false },
@@ -71,20 +83,29 @@
 		},
 		data() {
 			return {
+				patientinfo: null,
 				resultset: null,
-				reports
+				calculate: true,
+				calculations, reports
 			};
 		},
 		computed: {
 			params() {
 				return { dfn: this.dfn, date_begin: strftime_vista(this.date_begin), date_end: strftime_vista(this.date_end) };
 			},
+			constants() {
+				return this.patientinfo ? {
+					DOB: { time: time_min, value: strptime_vista(this.patientinfo.dob) },
+					Sex: { time: time_min, value: this.patientinfo.sex }
+				} : {};
+			},
 			reports_selected() {
 				return this.reports.filter(x => x.selected).map(x => x.value);
 			}
 		},
 		watch: {
 			async params(value, oldvalue) {
+				this.patientinfo = await this.client.ORWPT16_ID_INFO(value.dfn);
 				this.resultset = vitals_normalize(await this.client.GMV_EXTRACT_REC(value.dfn, value.date_end, value.date_begin)).concat(labs_normalize(await this.client.ORWLRR_INTERIM_RESULTS(value.dfn, value.date_end, value.date_begin)));
 			}
 		}

htdocs/util.mjs

@@ -77,3 +77,9 @@ export function debounce(fn, delay) {
 		clock = setTimeout(function() { fn.apply(self, args) }, delay);
 	}
 }
+
+function Descendant() {}
+export function inherit(obj) {
+	Descendant.prototype = obj;
+	return new Descendant();
+}