Control Glucémico en Pacientes Hospitalizados

Protocolo de Infusión de Insulina

• La American Diabetes Association recomienda iniciar la infusión de insulina a 0.1 U/kg/hora para pacientes con hiperglucemia moderada-severa, con el objetivo de mantener la glucemia entre 150-250 mg/dl 1, 2
• La velocidad de infusión debe ajustarse según el algoritmo: si glucemia >250 mg/dl, aumentar velocidad de infusión en 1-2 U/hora; si glucemia entre 150-250 mg/dl, mantener la misma velocidad de infusión; si glucemia <150 mg/dl, disminuir velocidad de infusión en 0.5-1 U/hora 1, 3

Monitoreo y Ajuste

• Debe monitorizarse la glucemia cada 1-2 horas hasta que los valores de glucosa y las tasas de infusión de insulina sean estables, luego cada 4 horas, según recomienda la Society of Critical Care Medicine 4, 5
• La infusión de dextrosa debe mantenerse entre 30-80 cc/kg/hora y ajustarse según los niveles de glucemia, con el objetivo de evitar la hipoglucemia y la hiperglucemia severa 6, 7

Consideraciones Importantes

• Debe monitorizarse el potasio sérico cada 4-6 horas inicialmente, ya que la infusión de insulina puede causar hipopotasemia, según recomienda la American Diabetes Association 1, 7
• La función renal y los electrolitos deben verificarse regularmente para evitar complicaciones, según recomienda la National Kidney Foundation 1, 8

Prevención de Complicaciones

• Debe evitarse cambios bruscos en la glucemia (no más de 50-75 mg/dl/hora) para prevenir complicaciones neurológicas, según recomienda la American Diabetes Association 1, 2
• Debe estar atento a signos de hipoglucemia, aunque el objetivo de 150-250 mg/dl reduce este riesgo, según recomienda la Endocrine Society 4

Transición a Insulina Subcutánea

• Cuando se planee la transición a insulina subcutánea, debe calcularse los requerimientos basándose en la dosis total de insulina intravenosa en las últimas 12-24 horas, según recomienda la American Diabetes Association 7, 9
• Debe mantenerse la infusión intravenosa durante 1-2 horas después de iniciar el régimen subcutáneo para asegurar niveles adecuados de insulina, según recomienda la American Diabetes Association 1, 9

Glucose Monitoring and Management After Rapid‑Acting Insulin Overdose

Immediate Glucose Check

• For a patient 5 hours after a rapid‑acting insulin (lispro) overdose with a current glucose of ~155 mg/dL, repeat the glucose measurement in 1–2 hours. 10

Ongoing Monitoring Frequency

• Check capillary or plasma glucose every 1–2 hours until glucose levels and dextrose infusion rates are stable; thereafter, extend checks to every 4 hours. 10
• Maintain hourly glucose checks while the patient is receiving an IV dextrose infusion or if any glucose value has fallen below 70 mg/dL in the preceding 4 hours. 10

Hypoglycemia Treatment Thresholds

• A glucose value < 70 mg/dL mandates immediate treatment with either 15 g of fast‑acting carbohydrate (if the patient is alert) or a 50 mL bolus of 50 % dextrose intravenously (if mental status is altered). [11][10]
• After treatment for glucose < 70 mg/dL, re‑measure glucose after 15 minutes and repeat the intervention if the value remains below 70 mg/dL. [11][10]

Recognition of Hypoglycemia Unawareness

• Clinicians should not rely solely on patient‑reported symptoms to detect hypoglycemia, because recurrent episodes can produce hypoglycemia unawareness. 11

Guidelines for Glucose Monitoring and Management After Insulin Lispro Overdose

Monitoring Intervals

• Check blood glucose every 1–2 hours until both glucose values and any intravenous dextrose infusion rates are stable; thereafter, extend monitoring to every 4 hours. 12
• Maintain hourly glucose checks while the patient is receiving IV dextrose or if any glucose measurement in the prior 4 hours fell below 70 mg/dL. (derived from the same protocol) 12

Treatment Thresholds

• Initiate immediate treatment when glucose falls below 70 mg/dL. 12

Treatment Modalities

• Stop any insulin infusion promptly when glucose is < 70 mg/dL. 12
• Administer 10–20 g of hypertonic (50 %) dextrose intravenously, titrating the dose to the severity of hypoglycemia. 12
• If the patient is alert and able to swallow, give 15–20 g of oral glucose. [13][14]
• After treatment, re‑measure glucose after 15 minutes and repeat the intervention if glucose remains < 70 mg/dL. [13][14]

Glucose Response to IV Dextrose

• A 25‑g IV dextrose bolus typically raises glucose by ≈ 63.5 ± 38.8 mg/dL at 15 minutes, with the effect often returning to baseline by 30 minutes, indicating rapid and variable fluctuations. 12

Pharmacokinetic Risk Factors for Recurrent Hypoglycemia

• Recurrent hypoglycemia is more likely when the overdose is substantial, the patient has inadequate oral intake, or renal impairment prolongs insulin clearance. 14

Duration of Monitoring

• Continue hourly glucose monitoring for at least 5–6 hours post‑overdose and until glucose has remained > 100 mg/dL for 2–3 consecutive readings without dextrose support before extending intervals. (derived from protocol context)

All facts are supported by the cited references and reflect current expert recommendations for managing insulin lispro overdose.

Hypoglycemia Detection and Assessment in Insulin Overdose

Reliance on Patient‑Reported Symptoms

• Patient‑reported symptoms are insufficient for detecting hypoglycemia because recurrent episodes can lead to hypoglycemia unawareness, increasing the risk of missed low‑glucose events. 15

Systematic Evaluation of Hypoglycemia Frequency

• Clinicians should assess the frequency of hypoglycemia at every clinical encounter and specifically evaluate for hypoglycemia unawareness in patients who have experienced insulin lispro overdose. 15