1 / 39

NUTRITIONAL SUPPORT IN SURGICAL PATIENTS

NUTRITIONAL SUPPORT IN SURGICAL PATIENTS. M K ALAM MS ; FRCS Professor of Surgery . Objectives. This presentation will explain: The need for nutritional support Consequences of malnutrition Methods of assessing malnutrition

dwinters
Download Presentation

NUTRITIONAL SUPPORT IN SURGICAL PATIENTS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NUTRITIONAL SUPPORT IN SURGICAL PATIENTS M K ALAM MS ; FRCS Professor of Surgery

  2. Objectives This presentation will explain: • The need for nutritional support • Consequences of malnutrition • Methods of assessing malnutrition • Types of nutritional support & its indications • Routes of providing nutritional support • Complications

  3. ADEQUATE DIET IS NECESSARY TO MAINATAIN NORMAL BODY COMPOSITION AND ORGAN FUNCTIONS

  4. Definition Nutritional support is an adjuvant therapy used to support the surgical patients until they are able to sustain themselves with adequate spontaneous nutrition by mouth.

  5. Malnutrition • Common in hospitalized patients. • Up to 50% may have moderate malnutrition. • Increases morbidity and mortality. • Damaging effects on activity level & appearance. • Damaging effects on psychological status. • Prolongs hospital stay

  6. ENDOGENOUS ENERGY STORESCARBOHYDRATE - GLYCOGEN • Just enough to last one day • Liver- 400 kcal • Muscle- 1600 kcal -- not readily available • Essential for: RBC, WBC, bone marrow, eye , renal medulla & peripheral nerves • Brain- normally uses glucose but switches to fat in starvation. • 1 Gm. = 4 kcal

  7. ENDOGENOUS ENERGY STORESFAT- ADIPOSE TISSUE • Largest fuel reserve • 120,000 kcal in a 70-kg man • 1 Gm. = 9kcal • Survival during starvation depends upon the amount of endogenous fat reserve

  8. ENDOGENOUS ENERGY STORES PROTEIN • Lean body mass- 13 Kg in a 70 Kg man • 30,000 kcal energy store • Inefficient source of energy • Used for essential nitrogenous substances for maintenance and growth • Synthesis requires non protein calorie source

  9. SIMPLE STARVATION ↓ energy expenditure ↑ use of fat for fuel ↑ lipolysis ↓ nitrogen loss ↓ glucose use by brain* * RBC, WBC, renal medulla, neurons, muscles & intestinal mucosa supply maintained POST-SURGERY STARVATION ↑ hormonal stimulation ↑ cellular activity ↑ metabolic rate ↑ energy expenditure ↑ gluconeogenesis ↑ protein breakdown ↑ nitrogen loss ↑Lipolysis

  10. Aim of nutritional support measures • The provision of nutrients with therapeutic intent (prevent / reverse the catabolic effects of disease or injury). • Identify in a timely manner patients in need of nutritional support • Provide nutritional requirements by most appropriate route to minimise complications

  11. MAIN CONSIDERATIONS • Which patient requires nutritional support? • Select the appropriate substrate. • Obtain and maintain access for delivery.

  12. WHICH PATIENT? • Severely malnourished due to disease • Become malnourished due to surgical therapy • Insufficient intake for more than 5-7 days • Unable to resume dietary intake within 5-7 days

  13. ASSESSMENT OF NUTRITIONAL STATUS • History : Altered oral intake Unintentional weight loss ( 10-15% in 4-6 months) • Physical examination: Body weight / BMI = wt. in kg/ height in m² ( normal- 18.5-24.9) Mid arm muscle circumference <60% ( M 25.5 cm, F 23 cm ) Triceps skin fold <60% ( M 12.5mm, F 16.5mm )

  14. ASSESSMENT OF NUTRITIONAL STATUS • Laboratory evaluation: Complete blood count Lymphocyte count < 1800/cmm Serum albumin < 30G/L • Immune competence: Delayed cutaneous hypersensitivity to intra-dermal antigens • Functional evaluation: Ability to do daily functions, hand grip

  15. PREOPERATIVE NUTRITIONAL SUPPORT • Improves outcome in severely malnourished • If possible, delay surgery • 5-7 days nutritional support • Avoid tumor feeding: limit calorie & protein to match need • Continue nutritional support postoperatively

  16. ASSESSMENT OF NUTRITIONAL REQUIREMENTS Optimal nutrition should provide adequate requirements of : Calories- Carbohydrate & fat Protein Water Electrolytes Trace elements Vitamins

  17. Energy requirements in adults • Energy : Uncomplicated patients- 25 Kcal/ kg/ day Complicated/ stressed pts. 30-35 Kcal/kg/day • Energy source : Carbohydrates 70- 80 % Lipids 20 %

  18. Carbohydrates: Predominant form used- dextrose Optimal oxidation @ 4-5mg/kg/min. • Lipids: 20% of total calories Lipid emulsion mixed with other element “3 in 1”

  19. Protein • Uncomplicated patients 1 g / kg/ day • Complicated/ stressed pts. 1.3-2g / kg/ day

  20. Electrolytes:* Sodium - 1 - 1.5 mEq / kg /day Potassium 0.7 - 1 mEq/ kg/ day Calcium 0.2-0.3 mEq/ kg/ day Magnesium 0.35-0.45 mEq /kg /day * adjusted daily • Trace elements • Vitamins

  21. Fluid requirements • 100 ml/kg/day – first 10 kg body wt. 50 ml / kg /day- for next 10 kg 20 ml / kg /day- for each additional kg • 1 ml of water / cal. / day • Adjust in patients : - who cannot tolerate large volume - additional fluid loss - febrile or septic

  22. ROUTES USED FOR NUTRITIONAL SUPPORT Enteral nutrition: Providing liquid formula diet in to a functioning GIT to maintain or improve nutritional status Parenteral nutrition: Delivering predigested nutrients directly to venous system Mixed( enteral + parenteral ): Tolerate low amount of enteral, weaning from parenteral

  23. Routes of enteral feeding • Nasogastric tube feeding – for short periods • Fine bore nasoenteric tube- positioned in stomach, duodenum, jejunum, better tolerated • Gastrostomy/ jejunostomy– surgical/ endoscopic / radiologic, neurological diseases, head/ neck carcinoma, major upper GIT surgery

  24. Feeding gastrostomy

  25. Jejunostomy feeding

  26. Enteral feeding • Intermittent bolus- suitable for stomach feeding • Continuous - suitable for duodenum/ jejunum feeding • Initiate at a slow rate, advance as tolerated • Initially dilute feeds, gradually advance to full strength • Feeding in semi-upright position particularly for stomach feeds • Maintain this position for 2 hours after feeds • Aspirate (stomach feeding) before next feeding. If >150ml, delay next feed.

  27. Advantages of enteral feeding • Simplicity • Greater availability • Lower cost • Well tolerated • Maintains gut integrity • Fewer complications

  28. Contraindications to enteral feeding • Intestinal obstruction • Paralytic ileus • High output entero-cutaneous fistula • Short bowel syndrome • Severe acute pancreatitis • Malabsorption

  29. Complications of enteral feeding • Mechanical: tracheobronchial intubation, erosion blockage, displacement, bowel perforation • Metabolic: Fluid/ electrolyte imbalance, hyperglycemia Refeeding / overfeeding syndromes • Gastrointestinal: Diarrhea, vomiting, pain • Pulmonary: Aspiration • Infection: Tube site

  30. Total parenteral nutrition- TPN Delivering predigested nutrients via hyperosmolar solution into venous system • TPN or CVN ( central venous nutrition ) : Subclavian / Internal jugular, Catheter tip in SVC Most commonly used • PVN ( peripheral venous nutrition ) or PPN: Solution of lower calorie, lower dextrose and higher lipid Suitable for 7-10 days feeding

  31. TPN vs PPN • Extended period of intensive nutritional support. • Administered through central venous catheter. • Solution contains high concentration of protein and dextrose • Given to patient who can tolerate some oral feeding but cannot ingest adequate amount of food. • Administered through peripheral veins • Two types of solutions used- lipid emulsions or amino acid- dextrose solutions

  32. TPN

  33. TPN - Indications • Non-functioning GIT Short bowel syndrome Intestinal fistula Severe pancreatitis Intractable vomiting/ diarrhea Severe inflammatory bowel disease Developmental anomalies Multiple organ failure • Sever malnutrition( unable to take orally )

  34. TPN - Administration • Check all laboratory values before starting • Nutrients given as 3in1 or 2+1 • Vitamin k given separately • Heparin & insulin can be added • Start with 1 L , increasing to desired level as tolerated • Monitor- CBC, electrolytes, glucose , urea, creatinine, Ca., Mg., phosphorus, bilirubin, coagulation profile, ALP, ALT,AST • Best managed by nutritional support team

  35. Home TPN • Long term nutritional support • Majority have malignancy • Special catheter- e.g. Hickman • Subclavian vein through subcutaneous tunnel • Support system

  36. Complications of TPN Catheter related: Vessel injury, thrombosis, Haemo/ pneumothorax, Brachial plexus injury, air embolism, sepsis Metabolic: Hyperglycemia, hypoglycemia, Hypertriglyceridemia, fluid & electrolyte disturbance, Hyperosmolar syndrome, steatohepatitis, Refeeding and overfeeding syndromes Others: Cirrhosis, acalcular cholecystitis, Gallstone, osteomalacia

  37. THANK YOU !

More Related