NTA Level 4 • Semester 2 • PST04211 Description of Solutions for Correcting Basic Pharmacology • Source Session/Topic 23 Full source-text version: all educational wording from the extracted learning source is retained; only presenter/tutor metadata and web-layout noise are removed, while formatting is improved for readability. Session 23: Description of Solutions for Correcting Electrolyte Imbalance Total Session Time: 120 minutes Prerequisites • None Learning Tasks By the end of this session students are expected to be able to: • List indications of solutions for correcting electrolyte imbalance • List contraindications of solutions for correcting electrolyte imbalance • Describe dose, dosage and course of solutions for correcting electrolyte imbalance • List side effects and adverse effects of solutions for correcting electrolyte imbalance • Describe interactions and precautions of solutions for correcting electrolyte imbalance Resources Needed: • Flip charts, marker pens, and masking tape • Black/white board and chalk/whiteboard markers • Computer and projector SESSION OVERVIEW Activity/ Step Time Content Method 1 05 minutes Presentation Introduction, Learning Objectives Presentation/ Indications of Solutions for Correcting 2 20 minutes Buzzing Electrolyte Imbalance Presentation/ Contraindications of Solutions for Correcting 3 20 minutes brainstorming Electrolyte Imbalance Dose, Dosage and Course of Solutions for 4 30 minutes Presentation Correcting Electrolyte Imbalance Presentation/ Side Effects and Adverse Effects of Solutions 5 15 minutes brainstorming for Correcting Electrolyte Imbalance Interactions and Precautions of Solutions for 6 20 minutes Presentation Correcting Electrolyte Imbalance 7 05 minutes Presentation Key Points 8 05 minutes Presentation Evaluation PST 04211 Basic Pharmacology NTA Level 4 Semester 2 Facilitator Guide 141 SESSION CONTENTS STEP 1: Presentation of Session Title and Learning Objectives (5 minutes) READ or ASK students to read the learning objectives and clarify ASK students if they have any questions before continuing. STEP 2: Indications of Solutions for Correcting Electrolyte Imbalance (20 minutes) Activity: Buzzing (5 minutes) ASK students to pair up and buzz on the following questions for 2 minutes • What are the solutions used for correcting electrolyte imbalance? • What are the indications of solutions for correcting electrolyte imbalance? ALLOW few pairs to respond and let other pairs to add on points not mentioned WRITE their response on the flip chart/board CLARIFY and SUMMARIZE by using the content below • Solution for correcting electrolyte imbalance include dextrose solution, sodium lactate solution, sodium chloride solution, potassium chloride solution and potassium citrate oral solution • General indications/uses: o Administration of concentrated drugs which require dilution o To minimize/control side effects of some drugs (e.g. Quinine in Dextrose to avoid hypoglycemic effect) o Correction of electrolyte and acid-base disorders/imbalances for example in conditions like severe diarrhea, severe vomiting o To correct hypotension by restoring blood volume in conditions like anaphylactic shock, poisoning o Correction of shock and establish proper tissue perfusion o When a quick effect of a drug is required through I.V administration • Sodium Chloride (Normal Saline): o Principal fluid used for intravascular resuscitation and replacement of salt loss e.g. diarrhoea and vomiting o Hypovolemic shock o Stroke o Used as a sterile irrigation medium PST 04211 Basic Pharmacology NTA Level 4 Semester 2 Facilitator Guide 142 • Sodium Lactate compound (Ringers Lactate): o Hypovolemic shock o Burns o Diarrhoea o Intraoperative o Intravenous fluid and electrolyte replacement o As a source of bicarbonate in treatment of mild to metabolic acidosis associated with potassium deficiency • Dextrose 5%: o Primarily used to maintain water balance in patients who are not able to take anything by mouth i.e. starvation deficit o Commonly used post-operatively in conjunction with salt retaining fluids i.e. saline • Dextrose 10%: o As Intravenous solution for fluid replenishment o caloric supply in single dose container for intravenous administration o As parenteral nutrient • Dextrose 50%: o Hypoglycemia o Status epilepticus o Coma o Altered mental status • Sodium chloride+ Dextrose (Dextrose saline): o Similar indications to 5% dextrose o Provides Na+ 30mmol/l and Cl- 30mmol/l i.e. a sprinkling of salt and sugar o Does not commonly cause water or salt overload • Potassium chloride Solution: o Hypokalemia STEP 3: Contraindications of Solutions for Correcting Electrolyte Imbalance (20 minutes) Activity: Brainstorming (5 minutes) Ask students to brainstorm on the following question: • What are contraindications of solutions for correcting electrolyte imbalance? ALLOW few students to respond WRITE their responses on the flip chart/ board CLARIFY and SUMMARISE by using the content below PST 04211 Basic Pharmacology NTA Level 4 Semester 2 Facilitator Guide 143 • Sodium Chloride (Normal Saline): o Severe Hypertension o Pulmonary edema o Congestive cardiac failure o Oedema o Severe renal impairment o Liver cirrhosis • Dextrose 5%: o Hyperglycemia • Dextrose 50%: o Cerebral vascular accident in presence of normal blood sugar. o Hyperglycemia o Increased Intracranial pressure(ICP) o Intracranial hemorrhage • Sodium Lactate Compound (Ringers Lactate): o Known hypersensitivity to sodium lactate o Congestive heart failure o Severe renal impairment o Lactic acidosis STEP 4: Dose, Dosage and Course of Solutions for Correcting Electrolyte Imbalance (30 minutes) • Dextrose 5%; 500ml, 1000ml. Provides some calories [approximately 10% of daily requirements]. Regarded as ‗electrolyte free‘ – contains NO Sodium, Potassium, Chloride or Calcium • Dextrose 10%;500ml • Dextrose 25%, 50%; 50ml, 100ml • Sodium lactate compound (Ringer‘s solution) 500ml, 1000ml. Each liter provides approximately Na+ 131 mmol, K 5mmol, Ca++ 2mmol, C1-111mmol and HCO3- (lactate) 29mmol • Sodium chloride+ Dextrose(Dextrose saline), 0.9%+5%; 500ml, 1000ml • Potassium chloride Solution 7.4% 10ml Vial • Potassium citrate oral solution containing potassium citrate PST 04211 Basic Pharmacology NTA Level 4 Semester 2 Facilitator Guide 144 STEP 5: Side Effects and Adverse Effects of Solutions for Correcting Electrolyte Imbalance (15 minutes) Activity: Brainstorming (5 minutes) Ask students to brainstorm on the following question: • What are side effects and adverse effects of solutions for correcting electrolyte imbalance? ALLOW few students to respond WRITE their responses on the flip chart/ board CLARIFY and SUMMARISE by using the content below • Sodium Chloride (Normal Saline): o Common cause of iatrogenic hyponatremia in surgical patients. o Reactions which may occur because of