Burn injuries gk


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Burn injuries gk

  1. 1. Burn Injuries
  2. 2. IntroductionThermal injuries are major causes ofmorbidity and mor-tality. Attention to thebasic principles of initial trauma re-suscitationand timely application of simple emergencymeasures can help to minimize the morbidityand mortal-ity caused by these injuries.
  3. 3. Epidemiology Tissue injury caused by thermal, electrical, or chemical agents Can be fatal, disfiguring, or incapacitating ~ 1.25 million burn injuries per year • 45,000 hospitalized per year • 4500 die per year (3750 from housefires) 3rd largest cause of accidental death
  4. 4. Risk Factors Fire/Combustion • Firefighter • Industrial Worker • Occupant of burning structures Chemical Exposure • Industrial Worker Electrical Exposure • Electrician • Electrical Power Distribution Worker
  5. 5. Skin Largest body organ. Much more than a passive organ. • Protects underlying tissues from injury • Temperature regulation • Acts as water tight seal, keeping body fluids in • Sensory organ
  6. 6. Skin Injuries to skin which result in loss, have problems with: • Infection • Inability to maintain normal water balance • Inability to maintain body temperature
  7. 7. Skin Two layers • Epidermis • Dermis Epidermis • Outer cells are dead • Act as protection and form water tight seal
  8. 8. Skin Epidermis • Deeper layers divide to produce the stratum corneum and also contain pigment to protect against UV radiation Dermis • Consists of tough, elastic connective tissue which contains specialized structures
  9. 9. Skin Dermis - Specialized Structures • Nerve endings • Blood vessels • Sweat glands • Oil glands - keep skin waterproof, usually discharges around hair shafts • Hair follicles - produce hair from hair root or papilla – Each follicle has a small muscle (arrectus pillorum) which can pull the hair upright and cause goose flesh
  10. 10. Burn Injuries Potential complications • Fluid and Electrolyte loss  Hypovolemia • Hypothermia, Infection, Acidosis •  catecholamine release, vasoconstriction • Renal or hepatic failure • Formation of eschar • Complications of circumferential burn
  11. 11. Burn Injuries An important step in management is to determine depth and extent of damage to determine where and how the patient should be treated
  12. 12. Types of Burn Injuries Thermal burn • Skin injury • Inhalation injury Chemical burn • Skin injury • Inhalation injury • Mucous membrane injury Electrical burn • Lightning Radiation burn
  13. 13. Depth Classification Superficial Partial thickness Full thickness
  14. 14. Burn Classifications 1st degree (Superficial burn) • Involves the epidermis • Characterized by reddening • Tenderness and Pain • Increased warmth • Edema may occur, but no blistering • Burn blanches under pressure • Example - sunburn • Usually heal in ~ 7 days
  15. 15. Burn Classifications  First Degree Burn (Superficial Burn)
  16. 16. Burn Classifications 2nd degree • Damage extends through the epidermis and involves the dermis. • Not enough to interfere with regeneration of the epithelium • Moist, shiny appearance • Salmon pink to red color • Painful • Does not have to blister to be 2nd degree • Usually heal in ~7-21 days
  17. 17. Burn Classifications 2nd Degree Burn (Partial Thickness Burn)
  18. 18. Burn Classifications 3rd degree • Both epidermis and dermis are destroyed with burning into SQ fat • Thick, dry appearance • Pearly gray or charred black color • Painless - nerve endings are destroyed • Pain is due to intermixing of 2nd degree • May be minor bleeding • Cannot heal and require grafting
  19. 19. Burn Classifications  3rd Degree Burn (Full Thickness burn)
  20. 20. Burn Injuries Often it is not possible to predict the exact depth of a burn in the acute phase. Some 2nd degree burns will convert to 3rd when infection sets in. When in doubt call it 3rd degree.
  21. 21. Body Surface Area Estimation Rule of Nines • Adult Palm Rule
  22. 22. Body Surface Area Estimation Rule of Nines • Peds – For each yr over 1 yoa, subtract 1% from head and add equally to legs Palm Rule
  23. 23. Burn Patient Severity Factors to Consider • Depth or Classification • Body Surface area burned • Age: Adult vs Pediatric • Preexisting medical conditions • Associated Trauma – blast injury – fall injury – airway compromise – child abuse
  24. 24. Burn Patient Severity  Patient age • Less than 2 or greater than 55 • Have increased incidence of complication  Burn configuration • Circumferential burns can cause total occlusion of circulation to an area due to edema • Restrict ventilation if encircle the chest • Burns on joint area can cause disability due to scar formation
  25. 25. Critical Burn Criteria 30 > 10% BSA 20 > 30% BSA • >20% pediatric Burns with respiratory injury Hands, face, feet, or genitalia Burns complicated by other trauma Underlying health problems Electrical and deep chemical burns
  26. 26. Moderate Burn Criteria 30 2-10% BSA 20 15-30% BSA • 10-20% pediatric Excluding hands, face, feet, or genitalia Without complicating factors
  27. 27. Minor Burn Criteria 30 < 2% BSA 20 < 15% BSA • <10% pediatric 10 < 20% BSA
  28. 28. Thermal Burn InjuryPathophysiology Emergent phase • Response to pain  catecholamine release Fluid shift phase • massive shift of fluid - intravascular  extravascular Hypermetabolic phase •  demand for nutrients  repair tissue damage Resolution phase • scar tissue and remodeling of tissue
  29. 29. Thermal Burn InjuryPathophysiology Jackson’s Thermal Wound Theory • Zone of Coagulation – area nearest burn – cell membranes rupture, clotted blood and thrombosed vessels • Zone of Stasis – area surrounding zone of coagulation – inflammation, decreased blood flow • Zone of Hyperemia – peripheral area of burn – limited inflammation, increased blood flow
  30. 30. Thermal Burn InjuryPathophysiology Eschar formation • Skin denaturing – hard and leathery • Skin constricts over wound – increased pressure underneath – restricts blood flow • Respiratory compromise – secondary to circumferential eschar around the thorax • Circulatory compromise – secondary to circumferential eschar around extremity
  31. 31. What is my first priority?Lifesaving measures for patients withburn injuries include establishingairway control, stopping the burningprocess, and establishing intravenousaccess.
  32. 32. Clinical indi-cations of inhalation injury include: Face and/or neck burns Singeing of the eyebrows and nasal vibrissae Carbon deposits and acute inflammatory changes in the oropharynx Carbonaceous sputum Hoarseness History of impaired mentation and/or confinement in a burning environment Explosion with burns to head and torso Carboxyhemoglobin level greater than 10% in pa-tient who was involved in a fire
  33. 33. AIRWAYTransfer to a burn center is indicated if thereis inhalation in-jury. If the transport time isprolonged, intubation should be performedprior to transport to protect the airway. Thesymp-tom of stridor is an indication forimmediate endotracheal in-tubation.Circumferential burns of the neck can lead toswelling of the tissues around the airway.Therefore, early in-tubation is indicated inthis situation.
  34. 34. BREATHINGPatients with CO levels of less than 20%usually have no physical symptoms. HigherCO levels can result in: (1) headache andnausea (20%-30%), (2) confusion (30%-40%),(3) coma (40%-60%), and (4) death (>60%).Baseline carboxyhemo-globin levels should beobtained, and 100% oxygen should beadministered.
  35. 35. STOP THE BURNING PROCESSAll clothing should be removed to stop theburning process; however, do not peel offadherent clothing. Dry chemical powdersshould be brushed from the wound, with theindividual caring for the patient avoidingdirect contact with the chemical, and theinvolved body-surface areas should be rinsedwith copious amounts of tap water. Thepatient then should be covered with warm,clean, dry linens to prevent hypothermia.
  36. 36. Assessment & Management -Thermal Injury Remove to safe area, if possible Stop the burning process • Extinguish fire - cool smoldering areas • Remove clothing and jewelry • Cut around areas where clothing is stuck to skin • Cool adherent substances (Tar, Plastic)
  37. 37. INTRAVENOUS ACCESSAny patient with burns over more than 20% ofthe body surface requires fluid resuscitation.Large-caliber (at least #16-gauge) intravenouslines should be introduced immediately in aperipheral vein.The upper extremities are preferable to thelower extremities for ve-nous access becauseof the high incidence of phlebitis and septicphlebitis when saphenous veins are used forvenous access.
  38. 38. Assessment & Management -Thermal Injury Pertinent History • How long ago? • What care has been given? • What burned with? • Burned in closed space? – Products of combustion present? – How long exposed? – Loss of consciousness? • Past medical history?
  39. 39. HISTORY Associated injuries Time of the burn injury Burns sustained within an enclosed space suggest the potential for inhalation injury. Preexisting illnesses (eg, diabetes, hy-pertension, cardiac, pulmonary, and/or renal disease) and drug therapy. Tetanus immunization status .
  40. 40. Assessment & Management -Thermal Injury Circulatory Status • Burns do not cause rapid onset of hypovolemic shock • If shock is present, look for other injuries • Circumferential burns may cause decreased perfusion to extremity
  41. 41. Assessment & Management -Thermal Injury Other • Assess Burn Surface Area & Associated Injuries • Analgesia • Avoid topical agents except as directed by local burn centers – e.g. silvadene • Fluid Therapy
  42. 42. Assessment & Management -Thermal Injury Consider Fluid Therapy for • >10% BSA 30 • >15% BSA 20 • >30-50% BSA 10 with accompanying 20 LR using Parkland Burn Formula • 4 (2-4) cc/kg/% burn • 1/2 in first 8 hours • 1/2 over 2nd 16 hours
  43. 43. Assessment & Management - Thermal Injury Fluid therapy • Objective – HR < 110/minute – Normal sensorium (awake, alert, oriented) – Urine output - 30-50 cc/hour (adult); 0.5-1 cc/kg/hr (pedi) – Resuscitation formula’s provide estimates, adjust to individual patient responses • Start through burn if necessary, upper extremities preferred • Monitor for Pulmonary Edema
  44. 44. Assessment & Management -Thermal Injury Analgesia • Morphine Sulfate – 2-3 mg repeated q 10 minutes titrated to adequate ventilations and blood pressure – 0.1 mg/kg for pediatric – May require large but tolerable total doses
  45. 45. Assessment & Management -Thermal Injury Treat Burn Wound • Low priority - After ABC’s and initiation of IV’s • Do not rupture blisters • Cover with sterile dressings – Moist: Controversial, limit to small areas (<10%) or limit time of application – Dry: Use for larger areas due to concern for hypothermia – Cover with burn sheet • No “Goo” on burn unless directed by burn center
  46. 46. Chemical Burns Usually associated with industrial exposure First Consideration: Should you be here? • Does the patient need decontamination before treatment? Burning will continue as long as the chemical is on the skin
  47. 47. Chemical Burns Acids • Immediate coagulation-type necrosis creating an eschar though self-limiting injury – coagulation of protein results in necrosis in which affected cells or tissue are converted into a dry, dull, homogeneous eosinophilic mass without nuclei
  48. 48. Chemical Burns Bases (Alkali) • Liquefactive necrosis with continued penetration into deeper tissue resulting in extensive injury – characterized by dull, opaque, partly or completely fluid remains of tissue Dry Chemicals • Exothermic reaction with water
  49. 49. Chemical Burn Management Definitive treatment is to get the chemical off! Begin washing immediately - removal the patient’s clothing as you wash • Watch for the socks and shoes, they trap chemicals
  50. 50. Chemical Burn Management Liquid Chemicals • wash off with copious amounts of fluid Dry Chemicals • brush away as much of the chemicals as possible • then wash off with large quantities of water Flush for 20-30 minutes to remove all chemicals
  51. 51. Chemical Burn Management Do not attempt neutralization • can cause additional chemical or thermal burns from the heat of neutralization Assess and Deliver secondary care as with other thermal and inhalation burns
  52. 52. Chemical Burn to EyeManagement Flood the eye with copious amounts of water only • Never place chemical antidote in eyes Flush using LR/NS/H2O from medial to lateral for at least 15 minutes • Nasal Cannula • IV Ad Set Remove contact lenses • May trap irritants
  53. 53. Specific ChemicalConsiderations Dry lime • Brush off • Dry lime is water activated • Then flush with copious amounts of water Phenol • Not water soluble • If available, use alcohol before flushing except in eyes • If unavailable, use copious amounts of water
  54. 54. Specific ChemicalConsiderations Sodium/Potassium metals • Reacts violently on contact with H20 • Requires large amounts of water Sulfuric Acid • Generates heat on exposure to H2O (exothermic) • Wash with soap to neutralize or use copious amounts H2O Tar Burns • Use cold packs • Do not pull off, can be dissolved later
  55. 55. Specific ChemicalConsiderations Chemical Mace • CN or CS – First chemical agents used by police/military • Mucous membrane and respiratory tract irritant • Skin sensitizer • Management – Treat respiratory distress – Continued irrigation and shower decontamination – Protect yourself first – Decontaminate everything afterward
  56. 56. Specific ChemicalConsiderations Chemical Mace • OC – Commonly referred to as “pepper spray” • Not as toxic as CN or CS • Mucous membrane irritant and skin sensitizer • May cause respiratory irritation • Management – Treat respiratory distress – Continued irrigation and shower decontamination – Protect yourself first – Decontaminate everything afterward
  57. 57. Electrical Burns Usually follows accidental contact with exposed object conducting electricity • Electrically powered devices • Electrical wiring • Power transmission lines Can also result from Lightning Damage depends on intensity of current
  58. 58. Electrical Burns Current kills, voltage simply determines whether current can enter the body • Ohm’s law: I=V/R Electrical follows shortest path to ground Low Voltage • usually cannot enter body unless: – Skin is broken or moist – Low Resistance (follows blood vessels/nerves) High Voltage • easily overcomes resistance
  59. 59. Electrical Burns Severity depends upon: • what tissue current passes through • width or extent of the current pathway • AC or DC • duration of current contact
  60. 60. Electrical Burns Most damage done is due to heat produced as current flows through tissues Skin burns where current enters and leaves can be almost trivial looking • Everything between can be cooked Higher voltage may result in more obvious external burns
  61. 61. Electrical Burns Alternating Current (AC) • Tetanic muscle contraction may occur resulting in: – Muscle injury – Tendon Rupture – Joint Dislocation – Fractures • Spasms may keep patient from freeing oneself from current
  62. 62. Electrical Burns Contact with Alternating Current can also result in: • Cardiac arrhythmias • Apnea • Seizures
  63. 63. Electrical Burns In addition to contact burns, patients can also develop flash burns when the current arcs near them • Flame burns may occur when clothing ignites after exposure to electrical current
  64. 64. Electrical Burns Lightning • HIGH VOLTAGE!!! • Injury may result from – Direct Strike – Side Flash • Severe injuries often result • Provides additional risk to EMS provider – Weather capable of producing lightning is still in the area
  65. 65. Electrical Burns Pathophysiology of Injuries • External Burn • Internal Burn • Musculoskeletal injury • Cardiovascular injury • Respiratory injury • Neurologic injury • Rhabdomyolysis and Renal injury
  66. 66. Electrical Burn Management Make sure current is off • Lightning hazards • Do not go near patient until current is off ABC’s • Ventilate and perform CPR as needed • Oxygen • ECG monitoring – Treat dysrhythmias
  67. 67. Electrical Burn Management Rhabdomyolysis Considerations • Fluid? • Dopamine? Assess for additional injuries Consider transport to trauma center
  68. 68. Electrical Burn ManagementAny patient with an electrical burn regardlessof how trivial it looks needs to go to thehospital. There is no way to tell how bad theburn is on the inside by the way it looks onthe outside.
  69. 69. Radiation Exposure Waves or particles of energy that are emitted from radioactive sources • Alpha radiation – large, travel a short distance, minimal penetrating ability – can harm internal organs if inhaled, ingested or absorbed • Beta radiation – small, more energy, more penetrating ability – usually enter thru damaged skin, ingestion or inhalation • Gamma radiation & X-rays – most dangerous penetrating radiation – may produce localized skin burns and extensive internal damage
  70. 70. Radiation Exposure Radiation exposure may result in: • external injury • contamination • incorporation injury • combined injuries
  71. 71. Radiation Exposure Effect of Injury dependent upon: • duration of exposure • distance from the source • shielding At risk for delayed complications
  72. 72. Radiation Exposure Management SAFETY!!! • Two Most Useful Tools for Radiation Incident Management • Protective Equipment Need for decontamination Likelihood of survival ABCs and Supportive Care
  73. 73. Pediatric Burns Thin skin • increases severity of burning relative to adults Large surface/volume ratio • rapid fluid loss • increased heat loss  hypothermia Delicate balance between dehydration and overhydration Immature immunological response  sepsis Always consider possibility of child abuse
  74. 74. Geriatric Burns Decreased myocardial reserve • fluid resuscitation difficulty Peripheral vascular disease, diabetes • slow healing COPD • increases complications of airway injury Poor immunological response - Sepsis % mortality ~= age + % BSA burned
  75. 75. CRITERIA FOR TRANSFER Partial-thickness and full-thickness burns of greater than 10% of the BSA in patients less than 10 years or over 50 years of age Partial-thickness and full-thickness burns on greater than 20% of the BSA in other age groups Partial-thickness and full-thickness burns involving the face, eyes, ears, hands, feet, genitalia, and per-ineum, as well as those that involve skin overlying major joints Full-thickness burns on greater than 5% of the BSA in any age group Significant electrical burns, including lightning injury (significant volumes of tissue beneath the surface can be injured and result in acute renal failure and other complications)
  76. 76. CRITERIA FOR TRANSFER Significant chemical burns Inhalation injury Burn injury in patients with preexisting illness that could complicate treatment, prolong recovery, or af-fect mortality Any patient with a burn injury who has concomi-tant trauma poses an increased risk of morbidity or mortality, and may be treated initially in a trauma center until stable before being transferred to a burn center Children with burn injuries who are seen in hospitals without qualified personnel or equipment to manage their care should be transferred to a burn center with these capabilities Burn injury in patients who will require special social and emotional or long-term rehabilitative support, including cases involving suspected child abuse and neglect