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Plegisol

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Overview

What is Plegisol?

Plegisol (Cardioplegic Solution) is a sterile, nonpyrogenic, essentially isotonic, formulation of electrolytes in water for injection. It is a "core solution" intended for use to adjust pH prior to administration. After buffering with sodium bicarbonate it is suitable for cardiac instillation (usually with hypothermia) to induce arrest during open heart surgery. Other agents may be added to the solution prior to instillation (See ).

Each 100 mL of solution contains calcium chloride, dihydrate 17.6 mg, magnesium chloride, hexahydrate 325.3 mg, potassium chloride 119.3 mg and sodium chloride 643 mg in water for injection. May contain HCl or NaOH for pH adjustment. Electrolyte content per liter (not including ions for pH adjustment): Calcium (Ca) 2.4 mEq; magnesium (Mg) 32 mEq; potassium (K) 16 mEq; sodium (Na) 110 mEq; chloride (Cl‾) 160 mEq. Osmolar concentration, 304 mOsmol/liter (calc.); pH 3.8 (3.5 to 3.9) prior to sodium bicarbonate addition.

It is required that 10 mL (840 mg) of 8.4% Sodium Bicarbonate Injection, USP (10 mEq each of sodium and bicarbonate) be added aseptically and thoroughly mixed with each 1000 mL of cardioplegic solution to adjust pH. Due to its inherent instability with other components, sodium bicarbonate must be added just prior to administration. After this addition, the solution must be stored under refrigeration and be used within 24 hours.

The buffered admixture contains the following electrolytes (per liter): Ca 2.4 mEq, Mg 32 mEq, K 16 mEq, Na 120 mEq, Cl‾ 160 mEq and bicarbonate (HCO‾) 10 mEq; osmolar concentration, 324 mOsmol/liter (calc.); pH 7.8 (approx.). If other agents are added, these values may be altered.

The solution contains no bacteriostat, or antimicrobial agent and is intended only for use (after adjusting pH with sodium bicarbonate) in a single operative procedure. When smaller amounts are required, the unused portion should be discarded.

Plegisol with added sodium bicarbonate used as a coronary artery infusate induces cardiac arrest, combats ischemic ionic disturbances, buffers ischemic acidosis and protects energy sources for functional recovery after ischemia.

Calcium Chloride, USP is chemically designated calcium chloride, dihydrate (CaCl • 2 HO), white fragments or granules freely soluble in water.

Magnesium Chloride, USP is chemically designated magnesium chloride, hexahydrate (MgCl • 6 HO), deliquescent flakes or crystals very soluble in water.

Potassium Chloride, USP is chemically designated KCl, a white granular powder freely soluble in water.

Sodium Chloride, USP is chemically designated NaCl, a white crystalline powder freely soluble in water.

Water for Injection, USP is chemically designated HO.

The flexible plastic container is fabricated from a specially formulated polyvinyl chloride. Water can permeate from inside the container into the overwrap but not in amounts sufficient to affect the solution significantly. Solutions in contact with the plastic container may leach out certain chemical components from the plastic in very small amounts; however, biological testing was supportive of the safety of the plastic container materials. Exposure to temperatures above 25°C/77°F during transport and storage will lead to minor losses in moisture content. Higher temperatures lead to greater losses. It is unlikely that these minor losses will lead to clinically significant changes within the expiration period.



What does Plegisol look like?



What are the available doses of Plegisol?

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What should I talk to my health care provider before I take Plegisol?

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How should I use Plegisol?

Plegisol (Cardioplegic Solution) when suitably buffered in combination with ischemia and hypothermia is used to induce cardiac arrest during open heart surgery.

The following information is suggested as a guide and is subject to variation according to the preference and experience of the surgeon.

It is required that 10 mL (840 mg) of 8.4% Sodium Bicarbonate Injection, USP (10 mEq each of sodium and bicarbonate) be added aseptically and thoroughly mixed with each 1000 mL of cardioplegic solution to adjust pH. Due to its inherent instability with other components, sodium bicarbonate must be added just prior to administration. After this addition, the solution must be used within 24 hours. The solution should be cooled to 4°C prior to use.

Following institution of cardiopulmonary bypass at perfusate temperatures of 28° to 30°C, and after cross-clamping of the ascending aorta, the buffered solution is administered by rapid infusion into the aortic root. The initial rate of infusion may be 300 mL/m/minute (about 540 mL/min in a 5'8", 70 kg adult with 1.8 square meters of surface area) given for a period of two to four minutes. Concurrent external cooling (regional hypothermia of the pericardium) may be accomplished by instilling a refrigerated (4°C) physiologic solution such as Normosol-R (balanced electrolyte replacement solution) or Ringer's Injection, USP into the chest cavity.

Should myocardial electromechanical activity persist or recur, the solution may be reinfused at a rate of 300 mL/m/min for a period of two minutes. Reinfusion of the solution may be repeated every 20 to 30 minutes or sooner if myocardial temperature rises above 15° to 20°C or returning cardiac activity is observed. The regional hypothermia solution around the heart also may be replenished continuously or periodically in order to maintain adequate hypothermia. Suction may be used to remove warmed infusates. An implanted thermistor probe may be used to monitor myocardial temperature.

The volumes of solution instilled into the aortic root may vary depending on the duration or type of open heart surgical procedure.

Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit (See ).

INSTRUCTIONS FOR USE

To Open

Tear outer wrap at notch and remove solution container. If supplemental medication is desired, follow directions below before preparing for administration. Some opacity of the plastic due to moisture absorption during the sterilization process may be observed. This is normal and does not affect the solution quality or safety. The opacity will diminish gradually.

To add 10 mL of 8.4% Sodium Bicarbonate Injection, USP, Hospira List 4900, and other supplemental medication, follow directions below before preparing for administration.

To Add Medication

Preparation for Administration

(Use aseptic technique)


What interacts with Plegisol?

Plegisol must not be administered without the addition of 8.4% Sodium Bicarbonate Injection, USP, Hospira List 4900.


NOT FOR INTRAVENOUS INJECTION.


This solution is only for instillation into cardiac vasculature after buffering with sodium bicarbonate.



What are the warnings of Plegisol?

When discontinuing acetaminophen and codeine phosphate tablets, gradually taper the dosage [see ]. Do not abruptly discontinue acetaminophen and codeine phosphate tablets [see ].

This solution should be used only by those trained to perform open heart surgery. This solution is intended only for use during cardiopulmonary bypass when the coronary circulation is isolated from the systemic circulation (See ).

Do not instill the solution into the coronary vasculature unless sodium bicarbonate has been added. If large volumes of cardioplegic solution are infused and allowed to return to the heart lung machine without any venting from the right heart, then plasma magnesium and potassium levels may rise. Development of severe hypotension and metabolic acidosis while on bypass has been reported when large volumes (8 to 10 liters) of solution are instilled and allowed to enter the pump and then the systemic circulation. Right heart venting is therefore recommended. The buffered solution with added sodium bicarbonate should be cooled to 4°C prior to administration and used within 24 hours of mixing.


What are the precautions of Plegisol?

Myocardial temperature should be monitored during surgery to maintain hypothermia.

Continuous electrocardiogram monitoring is essential to detect changes in myocardial activity during the procedure.

Appropriate equipment to defibrillate the heart following cardioplegia should be readily available.

Inotropic support drugs should be available during postoperative recovery.

Do not administer unless solution is clear and container is undamaged. Discard unused portion.

Drug Interactions

Additives may be incompatible. Consult with pharmacist, if available. When introducing additives, use aseptic technique, mix thoroughly and do not store (See ).



Pregnancy:

Pediatric Use

Safety and effectiveness in pediatric patients have not been established. Because of differences in structure, function, and metabolism, clinical myocardial protection strategies and Cardioplegia solutions that are effective in adult hearts may be less effective in the immature heart.

Geriatric Use

Clinical studies of Plegisol did not include sufficient numbers of subjects aged 65 and over to determine whether they responded differently from younger subjects. Other reported clinical experience has not identified differences in responses between older and younger patients.

In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosage range reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease.

This product is unique in that there is no hepatic or renal excretion and specific adjustments for dosing in the elderly are not known.


What are the side effects of Plegisol?

Intraoperative and perioperative potential hazards of open heart surgery include myocardial infarction, electrocardiographic abnormalities, and arrhythmias, including ventricular fibrillation. Spontaneous recovery after cardioplegic cardiac arrest may be delayed or absent when circulation is restored. Defibrillation by electric shock may be required to restore normal cardiac function.


What should I look out for while using Plegisol?

Plegisol must not be administered without the addition of 8.4% Sodium Bicarbonate Injection, USP, Hospira List 4900.

NOT FOR INTRAVENOUS INJECTION.

This solution is only for instillation into cardiac vasculature after buffering with sodium bicarbonate.

This solution should be used only by those trained to perform open heart surgery. This solution is intended only for use during cardiopulmonary bypass when the coronary circulation is isolated from the systemic circulation (See ).

Do not instill the solution into the coronary vasculature unless sodium bicarbonate has been added. If large volumes of cardioplegic solution are infused and allowed to return to the heart lung machine without any venting from the right heart, then plasma magnesium and potassium levels may rise. Development of severe hypotension and metabolic acidosis while on bypass has been reported when large volumes (8 to 10 liters) of solution are instilled and allowed to enter the pump and then the systemic circulation. Right heart venting is therefore recommended. The buffered solution with added sodium bicarbonate should be cooled to 4°C prior to administration and used within 24 hours of mixing.


What might happen if I take too much Plegisol?

Overzealous instillation of the solution may result in unnecessary dilatation of the myocardial vasculature and leakage into the perivascular myocardium, possibly causing tissue edema (See and ).


How should I store and handle Plegisol?

Store at 20° to 25°C (68° to 77°F)Protect from moisture.FOR YOUR PROTECTION:Store at 20° to 25°C (68° to 77°F)Protect from moisture.FOR YOUR PROTECTION:Store at 20° to 25°C (68° to 77°F)Protect from moisture.FOR YOUR PROTECTION:Plegisol (Cardioplegic Solution) is supplied (without sodium bicarbonate) in a single-dose 1000 mL flexible plastic container (List No. 7969, NDC 0409–7969–05).WARNING: Do not use flexible container in series connections.Store at 20 to 25°C (68 to 77°F). [See USP Controlled Room Temperature.] Protect from freezing.Distributed by Hospira, Inc., Lake Forest, IL 60045 USALAB-1244-2.0Revised: 04/2018Plegisol (Cardioplegic Solution) is supplied (without sodium bicarbonate) in a single-dose 1000 mL flexible plastic container (List No. 7969, NDC 0409–7969–05).WARNING: Do not use flexible container in series connections.Store at 20 to 25°C (68 to 77°F). [See USP Controlled Room Temperature.] Protect from freezing.Distributed by Hospira, Inc., Lake Forest, IL 60045 USALAB-1244-2.0Revised: 04/2018Plegisol (Cardioplegic Solution) is supplied (without sodium bicarbonate) in a single-dose 1000 mL flexible plastic container (List No. 7969, NDC 0409–7969–05).WARNING: Do not use flexible container in series connections.Store at 20 to 25°C (68 to 77°F). [See USP Controlled Room Temperature.] Protect from freezing.Distributed by Hospira, Inc., Lake Forest, IL 60045 USALAB-1244-2.0Revised: 04/2018Plegisol (Cardioplegic Solution) is supplied (without sodium bicarbonate) in a single-dose 1000 mL flexible plastic container (List No. 7969, NDC 0409–7969–05).WARNING: Do not use flexible container in series connections.Store at 20 to 25°C (68 to 77°F). [See USP Controlled Room Temperature.] Protect from freezing.Distributed by Hospira, Inc., Lake Forest, IL 60045 USALAB-1244-2.0Revised: 04/2018Plegisol (Cardioplegic Solution) is supplied (without sodium bicarbonate) in a single-dose 1000 mL flexible plastic container (List No. 7969, NDC 0409–7969–05).WARNING: Do not use flexible container in series connections.Store at 20 to 25°C (68 to 77°F). [See USP Controlled Room Temperature.] Protect from freezing.Distributed by Hospira, Inc., Lake Forest, IL 60045 USALAB-1244-2.0Revised: 04/2018Plegisol (Cardioplegic Solution) is supplied (without sodium bicarbonate) in a single-dose 1000 mL flexible plastic container (List No. 7969, NDC 0409–7969–05).WARNING: Do not use flexible container in series connections.Store at 20 to 25°C (68 to 77°F). [See USP Controlled Room Temperature.] Protect from freezing.Distributed by Hospira, Inc., Lake Forest, IL 60045 USALAB-1244-2.0Revised: 04/2018


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Clinical Information

Chemical Structure

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Clinical Pharmacology

Plegisol with added sodium bicarbonate when cooled and instilled into the coronary artery vasculature, causes prompt arrest of cardiac electromechanical activity, combats intracellular ion losses and buffers ischemic acidosis. When used with hypothermia and ischemia, the action may be characterized as cold ischemic potassium-induced cardioplegia. This is conducive to providing the surgeon with a quiet, relaxed heart and bloodless field of operation.

Calcium (Ca) ion in low concentration is included in the solution to maintain integrity of cell membrane to ensure that there is no likelihood of calcium paradox during reperfusion.

Magnesium (Mg) ion may help stabilize the myocardial membrane by inhibiting a myosin phosphorylase, which protects adenosine triphosphate (ATP) reserves for postischemic activity. The protective effects of magnesium and potassium have been shown to be additive.

Potassium (K) ion concentration is responsible for prompt cessation of mechanical myocardial contractile activity. The immediacy of the arrest thus preserves energy supplies for postischemic contractile activity in diastole.

The chloride (Cl‾) and sodium (Na) ions have no specific role in the production of cardiac arrest. Sodium is essential to maintain ionic integrity of myocardial tissue. The chloride ions are present to maintain the electroneutrality of the solution.

Added bicarbonate (HCO‾) anion is included as a buffer to render the solution slightly alkaline and compensate for the metabolic acidosis that accompanies ischemia.

Extemporaneous alternative buffering to the described formulation of this solution is not recommended.

Non-Clinical Toxicology
Plegisol must not be administered without the addition of 8.4% Sodium Bicarbonate Injection, USP, Hospira List 4900.

NOT FOR INTRAVENOUS INJECTION.

This solution is only for instillation into cardiac vasculature after buffering with sodium bicarbonate.

This solution should be used only by those trained to perform open heart surgery. This solution is intended only for use during cardiopulmonary bypass when the coronary circulation is isolated from the systemic circulation (See ).

Do not instill the solution into the coronary vasculature unless sodium bicarbonate has been added. If large volumes of cardioplegic solution are infused and allowed to return to the heart lung machine without any venting from the right heart, then plasma magnesium and potassium levels may rise. Development of severe hypotension and metabolic acidosis while on bypass has been reported when large volumes (8 to 10 liters) of solution are instilled and allowed to enter the pump and then the systemic circulation. Right heart venting is therefore recommended. The buffered solution with added sodium bicarbonate should be cooled to 4°C prior to administration and used within 24 hours of mixing.

Additives may be incompatible. Consult with pharmacist, if available. When introducing additives, use aseptic technique, mix thoroughly and do not store (See ).

Myocardial temperature should be monitored during surgery to maintain hypothermia.

Continuous electrocardiogram monitoring is essential to detect changes in myocardial activity during the procedure.

Appropriate equipment to defibrillate the heart following cardioplegia should be readily available.

Inotropic support drugs should be available during postoperative recovery.

Do not administer unless solution is clear and container is undamaged. Discard unused portion.

Intraoperative and perioperative potential hazards of open heart surgery include myocardial infarction, electrocardiographic abnormalities, and arrhythmias, including ventricular fibrillation. Spontaneous recovery after cardioplegic cardiac arrest may be delayed or absent when circulation is restored. Defibrillation by electric shock may be required to restore normal cardiac function.

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Reference

This information is obtained from the National Institute of Health's Standard Packaging Label drug database.
"https://dailymed.nlm.nih.gov/dailymed/"

While we update our database periodically, we cannot guarantee it is always updated to the latest version.

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Professional

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Tips

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Interactions

Interactions

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