5. Body Fluids electrolytes imbalance shock .ppt ·.ppt
0 likes•561 views
proper body fluid and electrolyte balance is crucial for preventing shock and ensuring successful patient outcomes. Fluid imbalances, particularly hypovolemia (low blood volume) or hypervolemia (excess fluid), can lead to shock, characterized by inadequate tissue perfusion and oxygenation. Management focuses on restoring fluid volume and electrolyte balance through appropriate fluid administration, monitoring vital signs, and addressing the underlying cause of the imbalance. Dr Aliya Shair Muhammad Lecturer: BUMHS , Quetta
5. Body Fluids electrolytes imbalance shock .ppt ·.ppt
- 1. BODY FLUIDS AND ELECTROLYTE BALANCE SHOCK AND CLASSIFICATION Dr Aliya Shair Muhammad Lecturer Bolan University Of Medical And Health Sciences, Quetta
- 2. Contents Body fluid Electrolytes balance Classification of fluid changes and Electrolytes imbalance Shock and classification of shock Pre, intra and post operative fluid therapy.
- 3. Homeostasis Maintenance of relatively stable internal environment.
- 10. FACTORS AFFECTING Total Body Water varies depending on body fat: infant: 73% male adult: 60% female adult: 40-50% effects of obesity Old age 45%
- 11. COMPOSITION OF BODY FLUIDS
- 13. COMPOSITION OF BODY FLUIDS CATIONS (mmol/l) Plasma Interstitial Intracellular Na 142 139 14 K 4.2 4.0 140 Ca 1.3 1.2 0 Mg 0.8 0.7 20 ANIONS (mmol/l) Cl 108 108 4.0 HCO3 24.0 28.3 10 Protein 1.2 0.2 4.0 HPO4 2.0 2.0 11
- 14. IMPORTANCE Maintaining ECF volume is critical to maintaining blood pressure ECF osmolarity is of primary importance in long-term regulation of ECF volume ECF osmolarity maintained mainly by NaCl balance: intake: 10.5g/d output: 10g/d in urine
- 15. FLUID COMPARTMENTS EXTRA CELLUAR FLUID INTRA CELLULAR FLUID INTERSTITIAL FLUID PLASMA TRANSCELLULAR FLUID CSF Intra ocular Pleural Peritoneal Synovial Digestive Secretions
- 16. Barriers separate ICF, interstitial fluid and plasma Plasma membrane Separates ICF from surrounding interstitial fluid Blood vessel wall Separate interstitial fluid from plasma
- 19. VOLUME OF BODY FLUIDS IN 70 kg MAN TOTAL VOLUME 42 L INTRA CELLUAR FLUID 28 L(ROUGHLY 2/3 OF TBW) EXTRA CELLULAR FLUID 14 L(ROUGHLY 1/3 OF TBW) PLASMA 4 L (ROUGHLY ¼ OF ECF)
- 20. Total Body Water BLOOD ECF ECF ICF ICF ICF Blood Interstitial Interstitial
- 21. Difference ECF Most abundant cation - Na+, muscle contraction Impulse transmission fluid and electrolyte balance Most abundant anion - Cl- Regulates osmotic pressure Forms HCl in gastric acid ICF Most abundant cation - K+ Resting membrane potential Action potentials Maintains intracellular volume Regulation of pH Anion are proteins and phosphates (HPO4 2- ) Na+ /K+ pumps play major role in keeping K+ high inside cells and Na+ high outside cell
- 22. TOTAL BODY WATER(TBW) 60% OF THE BODY WEIGHT IN ADULT MALE 50% OF THE BODY WEITH IN ADULT FEMALE
- 23. VOLUME MEASUREMENT OF VARIOUS FLUIDS COMPARTMETNS INTERSTITIAL FLUID ECF – Plasma Volume INTRACELLULAR FLUID TBW – ECF
- 24. FACTORS AFFECTING Physiological Adipose Tissue Sex Age Pathological Dehydration Overhydration
- 25. Specialized Fluids of the Body Lymph Milk Cerebrospinal fluid Amniotic fluid Aqueous humor Sweat Tears
- 26. Lymph Clear and colorless fluid 96% water and 4% solids Solids – Proteins 2-6% of solids albumin, globulin, fibrinogen, prothrombin, clotting factors, antibodies, enzymes Lipids 5-15% Chylomicrons Lipoproteins Carbohydrates Glucose mainly NPN Urea and creatinine Electrolytes Sodium, calcium, potassium, chloride, bicarbonates
- 27. Functions of Lymph Return protein from tissue spaces into blood Redistribution of fluid Removal of bacteria, toxins and other foreign bodies from tissues Maintain structural and functional integrity of tissue Route for intestinal fat absorption Transport lymphocytes
- 28. Milk Secreted by mammary glands Complete natural food 83-87% water and 13-17% solids Solids Carbohydrates Lactose Lipids Triacylglyerols Palmitic acid, myristic acid, stearic acid, lauric acid, butyric acid,oleic acid Proteins Caesin (80%), Lactalbumin Enzymes (proteases, xanthine oxidase,lysozyme), immunoglobulins Minerals Ca, Mg, P, Na, K, Cl Vitamins Fat and water soluble vitamins except Vit - C
- 29. Functions of Milk Milk sugar provides galactose, a structural unit for growing infant. In intestine, it gets metabolized to lactic acid which eliminates harmful bacteria. Source of protein, mineral and vitamins
- 30. Cerebrospinal fluid (CSF) Clear, colorless liquid formed within the cavities of brain and around spinal cord %500ml CSF is formed everyday At any given time, there is 120-150ml CSF in the system CSF is completely replaced about three times a day.
- 31. Functions of CSF Hydrolic shock absorber Regulation of intracranial pressure Influences the hunger sensation and eating behaviours
- 32. Amniotic Fluid Liquid produced by membranes and fetus Volume of fluid increases with gestational age Clear with some desquamated fetal cell and a little lipid.
- 33. Functions of AF Physical protection to the fetus Medium for exchange of various chemical
- 34. Aqueous Humor Fluid that fills the interior chamber of eye Secreted by ciliary body, enters anterior chamber Blockade in the flow of aqueous humor causes glaucoma due to increased intraocular pressure. Posterior chamber of eye is filled with vitrous humor which contains a gel (vitrous body of hyaluronic acid secreted by retina)
- 35. Sweat Secretion of sweat gland Regulates body temperature by cooling and evaporation Sweat glands controlled by ANS, Adrenal cortical steroid - which affect the quantity of electrolyte present
- 36. Sweat Insensible perspiration amounts to 800- 1200ml/day Volume of sweat produced/day during muscular exercise at elevated temperature may range from 10-14ml, which may lead to water and electrolyte imbalance Water content of sweat varies from 99.2- 99.7% pH – 4.7 to 7.5 Total non protein nitrogen (urea) varies from 0.07-1% per hour during copius sweating
- 37. Sweat Electrolyte in sweat varies Na+ 12.6-127 meq/l K+ 5-32 meq/l Cl- 8.5-85 meq/l
- 38. Tears Produced by lachrymal glands Isotonic but becomes hypertonic due to evaporation as fluid passes over the cornea When the tear flow is copius, fluid is isotonic Under stimulus with a slow rate of tear flow, the fluid is about 25m osm hypertonic Copius – Rapid tear flow induction
- 39. Tears pH – 7 to 7.6 due to loss of CO2 Protein content is 0.6 to 0.18g/dl with an albumin/globulin ratio of 1:5 or 2:1 Small amount of mucin is also present Lysozyme – lyses the cells of a number of micro- organisms by breaking down the polysaccharides of their outer layer
- 40. Functions of Tears Lysozyme protects eye from infectious agents Lubricate the surface of the cornea Fill the irregularities of the corneal surface to improve optical properties Protects eyes from injury
- 41. FLUID AND ELECTROLYTE IMBALANCE: Any abnormality in the concentration of fluid and electrolytes in the body leads to fluid-electrolyte imbalances. FLUID IMBALANCE: Deficient volume leads to- Hypovolemia & Dehydration Conditions: fever, sweating, burns, tachypnea, surgical drains, polyuria, or ongoing significant gastrointestinal loses.
- 42. Excess fluid volume leads to - Hypervolemia & Intoxication Conditions: heart failure, specifically of the right ventricle, cirrhosis, often caused by excess alcohol consumption or hepatitis. kidney failure, often caused by diabetes and other metabolic disorders.
- 43. ELECTROLYTE IMBALANCES:. Electrolytes are salts, acids, and bases, but electrolyte balance usually refers only to salt balance Salts are important for: - Essential minerals Controls osmosis between fluid compartments - Help maintain acid-base balance - Carry electrical (ionic) current for action potentials.
- 44. ELECTROLYTES : The electrolytes in human bodies include: sodium, potassium, calcium, bicarbonate, magnesium, chloride, phosphate. The level of an electrolyte in the blood can become too high or too low, leading to an imbalance. Electrolyte levels can change in relation to water levels in the body as well as other factors. Important electrolytes are lost in sweat during exercise, including sodium and potassium. The concentration can also be affected by rapid loss of fluids, such as after a bout of diarrhea or vomiting. Some other causes include kidney diseases, congestive heart failure, Chemotherapy, poor diet, sever dehydration, some drugs such as diuretics.
- 45. NORMAL RANGE OF ELECTROLYTES : The normal range for : 1. Sodium 135 to 145 mmol/L 2. . Potassium 3.7 to 5.2 mmol/L 3. . Calcium 8.5 to 10.6 mg/dl 4. . Magnesium 1.7 to 2.2 mg/dl 5. . Phosphate 0.81 to 1.45 mmol/L 6. . Chloride 97 to 107 mmol/L
- 46. 1. SODIUM: - Sodium holds a central position in fluid and electrolyte balance. Sodium is the single most abundant +cation in the ECF Accounts for 90-95% of all solutes in the ECF. Contribute 280 mOsm of the total 300 mOsm ECF solute concentration. - The role of sodium in controlling ECF volume and water distribution in the body is a result of: Sodium being the only cation to exert significant osmotic pressure. Sodium ions leaking into cells and being pumped out against their electrochemical gradient. Sodium concentration in the ECF normally remains stable Rate of sodium uptake across digestive tract directly proportional to dietary intake. Sodium losses occur through urine and perspiration. Changes in plasma sodium levels affect: Plasma volume, blood pressure ICF and interstitial fluid volume
- 47. Large variations in sodium are corrected by homeostatic mechanisms. - If sodium levels are too low, it is termed as HYPONATREMIA. In this, antidiuretic hormone (ADH) and aldosterone are secreted. - Regulation of Sodium Balance by ADH :-
- 48. Regulation of Sodium Balance: Aldosterone: A decrease in Na+ levels in the plasma stimulates aldosterone release. The kidneys detect the decrease in Na+ levels and cause a series of reactions referred to as the renin-angiotensin- aldosterone mechanisms. This is mediated by the juxtaglomerular apparatus, which releases renin in response to: - Sympathetic nervous system stimulation. Decreased filtrate osmolality. -Decreased stretch (due to decreased blood pressure) Sodium reabsorption 65% of sodium in filtrate is reabsorbed in the proximal tubules --25% is reclaimed in the loops of Henle When aldosterone levels are high, all remaining Na+ is actively reabsorbed. Water follows sodium if tubule permeability has been increased with ADH.
- 49. Regulation of Sodium Balance: Aldosterone
- 50. If sodium levels are too high, it is termed as HYPERNATREMIA. In this, atrial natriuretic peptide (ANP) is secreted. ATRIAL NATRIURETIC PEPTIDE (ANP): Is released in the heart atria as a response to stretch (elevated blood pressure), It has potent diuretic and natriuretic effects It promotes excretion of sodium and water, inhibits angiotensin II production.
- 51. 2. POTASSIUM :
- 52. Conti… •Hypokalemia (low K ) ⁺ •↓ Extracellular K → ↑ gradient → ⁺ hyperpolarization (becomes even more negative than normal)→ cells are less responsive •Reduced Na /K -ATPase activity → delayed repolarization ((K ) ions ⁺ ⁺ ⁺ flow out of the cell) → disturbed cardiac conduction, risk of arrhythmias & sudden death •Hyperkalemia (high K ) ⁺ •↑ Extracellular K → ↓ gradient → ⁺ depolarization (more positive) because sodium (Na ) ions go in) → initial excitability ⁺ Followed by Na channel inactivation → conduction slows or ⁺‑ blocks Leads to ECG changes (peaked T waves → widened QRS → sine-wave) → fatal arrhythmias, ‑ possible sudden death •Acid–Base & K Shifts ⁺ •↑ H (acidosis) → H enters cells → K exits → extracellular ⁺ ⁺ ⁺ hyperkalemia •↓ H (alkalosis) → opposite effect ⁺ •These shifts disrupt excitable cell function
- 53. 3. CALCIUM :
- 54. Ca. continue…
- 55. Conti… Calcium reabsorption and phosphate excretion go simultaneously: Filtered phosphate is actively reabsorbed in the proximal tubules. In the absence of PTH, phosphate reabsorption is regulated by its transport maximum and excesses are excreted in urine. High or normal ECF calcium levels inhibit PTH secretion. - Release of calcium from bone is inhibited. - Larger amounts of calcium are lost in feces and urine. - More phosphate is retained.
- 56. 4. PHOSPHATE : •Phosphate is an electrolyte containing the mineral phosphorus essential for: strengthens bones and Teeth supports cell membranes vital for energy production (ATP) • In excess, phosphate can cause bone and muscle issues and raise the risk of heart attack and stroke •High phosphate levels often indicate kidney damage, especially in chronic kidney disease (CKD) It is common in individuals with CKD, particularly those with end- stage kidney disease
- 58. 5. MAGNESIUM :
- 59. Conti…
- 60. Conti….
- 61. ACID - BASE BALANCE :
- 62. Sources of Hydrogen lons:
- 64. Buffer system: The three main buffer systems in our bodies are the: 1. Bicarbonate buffer system 2. Phosphate buffer system 3. Protein buffer system
- 65. 1. Bicarbonate Buffer System:
- 67. .3. Protein Buffer System:
- 68. Shock
- 71. Fluid Therapy
- 72. Introduction Importance of fluid therapy in surgical patients Goals: Maintain perfusion, prevent organ dysfunction, support recovery
- 73. Preoperative Fluid Therapy: Goals Correct fluid/electrolyte imbalances Restore volume in hypovolemia Prevent dehydration from fasting Management Clinical assessment (vitals, labs) Use of isotonic crystalloids (0.9% NaCl, Ringer's Lactate) Calculate and replace estimated deficits
- 74. Intraoperative Fluid Therapy – Goals Maintain hemodynamic stability Replace fluid losses (insensible, third-space, blood loss) Ensure adequate urine output
- 75. Intraoperative Fluids & Replacement Fluids: Crystalloids (Ringer’s Lactate, NS) Colloids (Albumin, Hydroxyethyl starch) Blood products (if significant loss) Replacement guide: Maintenance: 1–1.5 mL/kg/hr Third-space: 2–4 mL/kg/hr Blood loss: 3:1 rule for crystalloids, 1:1 for colloids/blood
- 76. Intraoperative Monitoring Vital signs (BP, HR) Urine output (>0.5 mL/kg/hr) CVP / Arterial line (for high-risk patients)
- 77. Postoperative Fluid Therapy – Goals Maintain fluid/electrolyte balance Replace ongoing losses (e.g., drains, vomiting) Prevent overload/dehydration Management Continue IV fluids if NPO Transition to oral as tolerated Monitor: weight, I/O, serum electrolytes, clinical status
- 78. Phase Goals Fluids Key Monitoring Pre-op Correct deficits NS, RL Labs, vitals, hydration status Intra-op Maintain perfusion, replace loss Crystalloids, colloids, blood BP, HR, UO, advanced monitors Post-op Maintain balance, support recovery Maintenance IV or oral fluids I/O, weight, labs, clinical signs
Editor's Notes
- #50: Inhibition of angiotensin II production:help blood pressure by reducing vasoconstriction and aldosterone release.
- #52: Depolarization is the first part of the action potential. It happens when the inside of the cell becomes less negative (more positive) because sodium (Na⁺) ions rush in. Repolarization is the process of the cell returning to its normal negative state after depolarization. This happens when potassium (K⁺) ions flow out of the cell.