Potassium Chloride 0.15 % w/v and Glucose 10 % w/v Solution for Infusion is a hypertonic solution with an approximate osmolarity of 595 mOsm/l.
High volume infusion must be used under specific monitoring in patients with cardiac, pulmonary or renal failure.
Regular monitoring of clinical status, blood glucose level, plasma electrolyte concentrations, plasma creatinine levels, BUN level, acid-base balance and ECG is essential in patients receiving potassium therapy, particularly those with cardiac or renal impairment.
Glucose intravenous infusions are usually isotonic solutions. In the body, however, glucose containing fluids can become extremely physiologically hypotonic due to rapid glucose metabolization (see section 4.2).
Depending on the tonicity of the solution, the volume and rate of infusion and depending on a patient's underlying clinical condition and capability to metabolize glucose, intravenous administration of glucose can cause electrolyte disturbances most importantly hypo- or hyperosmotic hyponatraemia.
As glucose tolerance may be impaired in patients with diabetes, renal failure or acute critical illness, clinical and biological parameters, in particular plasma-electrolytes including magnesaemia or phosphatemia and glycaemia should be particularly closely monitored. If hyperglycaemia occurs, the rate of infusion should be adjusted or insulin should be administered.
Administration of solutions containing glucose may lead to decreased concentrations of potassium in the plasma. Therefore, potassium solutions containing glucose should not be used for the initial correction of hypokalaemia.
Do not use plastic containers connected in series. Such use could result in air embolism due to residual air being drawn from the primary container before the administration of the fluid from the secondary container is completed.
Special clinical monitoring is required at the beginning of any intravenous infusion.
Blood
Potassium Chloride 0.15% w/v and Glucose 10% w/v Solution should not be administered simultaneously with blood through the same administration set because of the possibility of pseudoagglutination or haemolysis.
Hyponatraemia
Patients with non-osmotic vasopressin release (e.g. in acute illness, pain, post-operative stress, infections, burns, and CNS diseases), patients with heart-, liver- and kidney diseases and patients exposed to vasopressin agonists (see section 4.5) are at particular risk of acute hyponatraemia upon infusion of hypotonic fluids.
Acute hyponatraemia can lead to acute hyponatraemic encephalopathy (brain oedema) characterized by headache, nausea, seizures, lethargy and vomiting. Patients with brain oedema are at particular risk of severe, irreversible and life-threatening brain injury.
Children, women in the fertile age and patients with reduced cerebral compliance (e.g. meningitis, intracranial bleeding, and cerebral contusion) are at particular risk of the severe and life-threatening brain swelling caused by acute hyponatraemia.
Rapid correction of hyponatremia may cause serious neurologic complications, in particular in paediatric patients (see Paediatric Use).
Hypo and hyperosmolality, serum electrolytes and water imbalance
Depending on the volume and rate of infusion and depending on a patient's underlying clinical condition and capability to metabolize glucose, intravenous administration of Potassium Chloride 0.15% w/v and Glucose 10% w/v solution may cause:
• Hypo-osmolality
• Hyperosmolality, osmotic diuresis and dehydration
• Electrolyte disturbances such as
o Hyponatraemia (see Hyponatraemia),
o Hypophosphatemia,
o Hypomagnesemia,
• Acid-base imbalance
• Overhydration/hypervolemia and, for example, congested states, including central (e.g., pulmonary congestion) and peripheral edema. Particular caution should be taken in patients with conditions that may cause sodium retention, fluid overload, and edema (central and peripheral).
• Hyponatremia and a decrease in extracellular sodium concentrations related to hyperglycaemia causing a transcellular shift of water.
• Infusion of Potassium Chloride 0.15% w/v and Glucose 10% w/v solution corresponds to the increasing body's load of free water, possibly leading to hypoosmotic hyponatremia.
Clinical evaluation and periodic laboratory determinations may be necessary to monitor changes in fluid balance, electrolyte concentrations, and acid-base balance during prolonged parenteral therapy or whenever the condition of the patient or the rate of administration warrants such evaluation.
Particular caution is advised in patients at increased risk of and from water and electrolyte disturbances that could be aggravated by increased free water load.
Hyperglycaemia
Rapid administration of glucose solutions may produce substantial hyperglycaemia and hyperosmolar syndrome. In order to avoid hyperglycaemia the infusion rate should not exceed the patient's ability to utilize glucose.
To reduce the risk of hyperglycaemia-associated complications, the infusion rate must be adjusted and/or insulin administered if blood glucose levels exceed levels considered acceptable for the individual patient.
Intravenous glucose should be administered with caution in patients with, for example:
• impaired glucose tolerance (such as in diabetes mellitus, renal impairment, or in the presence of sepsis, trauma, or shock),
• severe malnutrition (risk of precipitating a refeeding syndrome),
• thiamine deficiency, e.g., in patients with chronic alcoholism (risk of severe lactic acidosis due to impaired oxidative metabolism of pyruvate),
• water and electrolyte disturbances that could be aggravated by increased glucose and/or free water load
Other groups of patients in whom Potassium Chloride 0.15% w/v and Glucose 10% w/v solution should be used with caution include:
• Patients with ischemic stroke. Hyperglycaemia has been implicated in increasing cerebral ischemic brain damage and impairing recovery after acute ischemic strokes.
• Patients with severe traumatic brain injury (in particular during the first 24 hours following the trauma). Early hyperglycaemia has been associated with poor outcomes in patients with severe traumatic brain injury.
• Newborns (See Paediatric glycaemia-related issues).
Prolonged intravenous administration of glucose and associated hyperglycaemia may result in decreased rates of glucose-stimulated insulin secretion.
Hyperkalaemia
Caution should be taken to patients with conditions predisposing to hyperkalaemia and/or associated with increased sensitivity to potassium, such as patients with:
• acute dehydration,
• extensive tissue injury or burns,
• certain cardiac disorders such as congestive heart failure or atrioventricular (AV) block (especially if they receive digitalis),
• potassium-aggravated skeletal muscle channelopathies (e.g., Hyperkalaemic periodic paralysis, paramyotonia congenita, and potassium-aggravated myotonia/paramyotonia).
• Renal or adrenocortical insufficiency
Caution should be taken to patients who are at risk of experiencing hyperosmolality, acidosis, or undergoing correction of alkalosis (conditions associated with a shift of potassium from intracellular to extracellular space) and patients treated concurrently or recently with agents or products that can cause hyperkalaemia (see Interactions with Other Medicinal Products and Other Forms of Interaction, Section 4.5).
Caution should be taken for patients with cardiac arrhythmia. Arrhythmias can develop at any time during hyperkalaemia. Frequently, mild or moderate hyperkalaemia is asymptomatic and may be manifested only by increased serum potassium concentrations and, possibly, characteristic ECG changes.
Hypokalaemia
The infusion Potassium Chloride 0.15% w/v and Glucose 10% w/v solution may result in hypokalaemia. Hypokalaemia can lead to arrhythmias, muscle weakness, paralysis, heart block, and rhabdomyolysis.
Potassium Chloride 0.15% w/v and Glucose 10% w/v solution should be used with particular caution, warranting close clinical monitoring, for example:
• in persons with metabolic alkalosis,
• in persons with thyrotoxic or hypokalemic periodic paralysis,
• in persons with increased gastrointestinal losses (e.g., diarrhoea, vomiting),
• in persons on prolonged low potassium diet (e.g., undernourished or cachectic patients),
• in persons with primary hyperaldosteronism,
• in patients treated with medications that increase the risk of hypokalaemia (e.g. hydrochlorothiazide, loop diuretics, beta-2 agonists, or insulin).
Hypersensitivity Reactions
Hypersensitivity/infusion reactions, including anaphylaxis, have been reported with Potassium Chloride 0.15% w/v and Glucose 10% w/v Solution (see section 4.8).
Stop the infusion immediately if signs or symptoms of hypersensitivity/infusion reactions develop. Appropriate therapeutic countermeasures must be instituted as clinically indicated.
Solutions containing glucose should be used with caution in patients with known allergy to corn or corn products.
Refeeding syndrome
Refeeding severely undernourished patients may result in the refeeding syndrome that is characterized by the shift of potassium, phosphorus, and magnesium intracellularly as the patient becomes anabolic. Thiamine deficiency and fluid retention may also develop. Careful monitoring and slowly increasing nutrient intake while avoiding overfeeding can prevent these complications.
Use in Patients at risk of Severe Renal Impairment
Potassium Chloride 0.15% w/v and Glucose 10% w/v Solution should be administered with particular caution, to patients at risk of severe renal impairment.
Paediatric Use
The infusion rate and volume depends on the age, weight, clinical and metabolic conditions of the patient, concomitant therapy, and should be determined by a consulting physician experienced in paediatric intravenous fluid therapy.
Paediatric glycaemia-related issues
• Newborns, especially those born premature and with low birth weight, are at increased risk of developing hypo- or hyperglycaemia. Close monitoring during treatment with intravenous glucose solutions is needed to ensure adequate glycaemic control, in order to avoid potential long term adverse effects (see section 4.6).
• Hypoglycaemia in the newborn can cause, e.g.,
o prolonged seizures,
o coma, and
o cerebral injury.
• Hyperglycaemia has been associated with
o cerebral injury, including intra-ventricular haemorrhage,
o late onset bacterial and fungal infection,
o retinopathy of prematurity,
o necrotizing enterocolitis,
o increased oxygen requirements,
o prolonged length of hospital stay
o death
Paediatric hyponatraemia-related issues
• Children (including neonates and older children) are at increased risk of developing hyponatraemia as well as for developing hyponatraemic encephalopathy.
• The infusion of hypotonic fluids together with the non-osmotic secretion of ADH may result in hyponatraemia.
• Acute hyponatraemia can lead to acute hyponatraemic encephalopathy (brain edema) characterized by headache, nausea, seizures, lethargy and vomiting. Patients with brain edema are at particular risk of severe, irreversible and life-threatening brain injury.
• Plasma electrolyte concentrations should be closely monitored in the paediatric population.
• Rapid correction of hyponatraemia is potentially dangerous (risk of serious neurologic complications). Dosage, rate, and duration of administration should be determined by a physician experienced in paediatric intravenous fluid therapy.
Elderly Use
When selecting the type of infusion solution and the volume/rate of infusion for an elderly patient, consider that elderly patients are generally more likely to have cardiac, renal, hepatic, and other diseases or concomitant drug therapy.