diff --git a/src/sections/HistoriaClinica.tsx b/src/sections/HistoriaClinica.tsx
index fb4e0f4..43b7184 100644
--- a/src/sections/HistoriaClinica.tsx
+++ b/src/sections/HistoriaClinica.tsx
@@ -729,7 +729,8 @@ for (const linea of lineas) {
         if (lineaLower.includes(clave)) {
           let match = linea.match(/show_chart.*?(\d+\.?\d*)/);
           if (!match) {
-            match = linea.match(new RegExp(clave + '.*?(\\d+\\.?\\d*)'));
+            const claveEscaped = clave.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+            match = linea.match(new RegExp(claveEscaped + '.*?(\\d+\\.?\\d*)'));
           }
           if (match && match[1]) {
             const valor = parseFloat(match[1].replace(',', '.'));