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seeing through the windows of my soul..
General considerations
The injury: The mechanism of injury is important in assessing the degree of risk of complications of a given wound. For example, the farmer who pierces his foot with a manure-laden pitchfork is at high risk for gas gangrene and sepsis. Management would include extensive local wound care and possible admission to hospital for intravenous antibiotics. Mammalian bites present another risk situation for infection. Is there likely to be a foreign body present in the wound? Does the force of injury suggest there is likely to be extensive trauma to deeper tissues?
The patient: Consider complicating medical conditions such as diabetes, other immunosuppressed states including diabetes or other major organ dysfunction (such as renal or hepatic failure) and peripheral vascular disease. These all may affect both resistance to infection and wound healing itself.
Time of injury: The age of the wound is important in deciding the timing of closure, if at all.
Laceration | Age / Condition | Treatment |
Extremity | < 12 hours and “clean” | suture primarily |
Extremity | >12 hours older or “dirty” | Older or obviously contaminated or infected lacerations are best left alone for healing by secondary intention or tertiary intention (closure a few days later). Saline soaks and antibiotics usually will be required. If cosmetic or other functional considerations apply, then referral to a plastic surgeon is necessary. |
Face | < 24 hours | suture primarily unless obviously infected (rare) |
These times are based on common medical practice in Canada. A study of forearm and hand lacerations found that closure within 4 hours had a lower infection rate than more than 6 hours from injury.1
Consultation: Emergency physicians may consider early referral of certain lacerations to an appropriate surgeon. Indications for referral could include:
Assessment of function and the importance of wound exploration
Assess wounds under optimal lighting with minimal bleeding. Important structures underlying any laceration or contusion should be assumed divided until proven otherwise. Motor, sensory and vascular function must always be assessed.
The physician, however, cannot rely only on tests of motor or sensory function to rule out injuries to tendon or nerve. Only a small portion of a tendon in the finger, for example, needs to remain intact to maintain function. However, if the patient is sent home with such a partial tendon injury, total rupture may occur when the tendon is stressed.
Note that there is no reliable test for isolating a particular wrist flexor or extensor, because more than one muscle performs the same function.
Therefore, wounds in the vicinity of important structures should be gently explored. If visualisation is difficult or the anatomy complex, then an appropriate surgeon should be consulted.
Tendon, nerve or vascular injuries are all too easy to miss unless due care is taken.
Finger Injuries
Injuries to the fingers and hands account for the majority of such cases. Tendon and nerve injuries of the fingers will now be reviewed, followed by a brief discussion of vascular injuries.
Tendon, nerve or vascular injuries are all too easy to miss unless due care is taken. In addition for testing function, these wounds should be gently explored. Injuries to the fingers and hands account for the majority of such cases.
A tendon is visualized through the open wound margin of this wound of the hand.
Finger Injuries
Tendon and nerve injuries of the fingers will now be reviewed, followed by a brief discussion of vascular injuries.
Profundus tendon testing of long finger D3 | Superficialis tendon testing of long finger D3 |
Pulses may or may not be absent depending on the degree of injury.pain
pallor
pulselessness
paresthesia
paresis
poikilothermia
The involved compartment needs to be released immediately.
Local anesthetics
There are two major groups of local anaesthetics: esters and amines.
If a past allergy is reported, an anesthetic from another class can be used. Most often, however, the allergy is to the preservative used in the lidocaine multidose vials. Therefore, one option is to use a single-dose lidocaine preparation that does not contain preservatives.
For routine Emergency room use, a mixture of lidocaine 1%, with or without epinephrine 1/100,000 parts, is recommended. For regional nerve blocks, a 2% solution is used. The lidocaine 2% solution can be combined with equal parts of the Marcaine 0.25% solution to obtain relatively quick, yet longer lasting anaesthesia. The anaesthetic effect of lidocaine lasts less than an hour, but as long as two hours if the epinephrine containing preparation is used. Marcaine’s effect lasts from 12-24 hours. This would be important, for example, in the case of a distal digit amputation, where longer-term anaesthesia is desired. Some patients continue to experience considerable pain even after simple suturing, and Marcaine could significantly reduce such pain.
Epinephrine is commonly used as an adjuvant to reduce bleeding and slow anaesthetic absorption systemically. A noticeable decrease in wound bleeding will be noted in about seven minutes. Epinephrine should be avoided in those patients with vasospastic disorders, those with crush or circumferential extremity injuries, or those on beta-blockers. The use of epinephrine in the fingers, toes or penis has classically been contraindicated, because of its supposed propensity to cause vasospasm in these areas.
A toxic dose of Xylocaine (lidocaine) is 3 mg per kg intravenously; 5 mg per kg when injected without epinephrine into the wound margin, and 7 mg per kg when injected with epinephrine into the wound margin. There is evidence that the toxic dose may actually be much higher than usually quoted. The toxicity of Marcaine is one-quarter that of lidocaine, on a weight to weight basis.
Prior to the administration of local anaesthetics, check the sensory and motor nerve response, and for allergy (very rare). The pediatric literature supports the use of a topical anesthetic such as LET (a combination of lidocaine, epinephrine and tetracaine) prior to needle infiltration to reduce the pain. Slow injection by a small needle (such as a 25, 27 or 30 Gauge) will reduce the pain of infiltration.
Adverse reactions to local anaesthetics may take several forms.
Adverse Reactions to Local Anaesthetics | |||
Type | Incidence | Mechanism | Symptoms |
Vasovagal | Common | nausea, light-headedness bradycardia vasodilatation hypotension syncope | |
Epinephrine related | Common | “ rash” tremor, headache palpitations abdominal and uterine cramps | |
Toxic (>3mg /kg IV, >5 mg/kg without epinephrine, > 7 mg/kg with epinephrine) | relatively common | IV leak (? From regional blocks?) | tachycardia arrhythmia CNS excitation, depression seizure, coma |
Allergic | rare to amides uncommon to esters | IgE mediated ? methylparaben preservative ? antioxidants (sulphites) | angioedema bronchospasm tachycardia hypotension |
If there is doubt about allergy, in minor cases, plain normal saline can be injected into the wound margin to stretch the skin, thereby affording some degree of anaesthesia.
Malignant hyperthermia is now considered NOT to be precipitated by the use of lidocaine. Traditionally, in this setting, an ester has been utilised.
Tetanus prophylaxis - Tetanus vaccination
The tetanus disease itself is a serious one but relatively rare in Canada.
An identifiable acute injury occurs in the majority of cases (70%). Puncture wounds and lacerations account for most cases. Interestingly, approximately one-half of these injuries occurred indoors. Only a small percentage of cases occur in previously properly “immunised” patients. The incubation period is from two days to two months.
Tetanus vaccines must be administered intramuscularly. The anterolateral thigh is recommended in infants and the deltoid muscle in older children and adults. These adsorbed vaccines should not be administered subcutaneously as sterile abscess can form.
Since 1982, all school children in Ontario are required by law to be immunised. As of 1987, it is the law in Ontario that physicians inform their patients of the risks and benefits of immunisation. Adverse reactions to primary immunisation with tetanus toxoid are rare. The booster dose, however, can cause local erythema and swelling. Overuse of tetanus vaccines can lead to Arthus type reactions, urticarial reactions, and angioneurotic edema , and rarely, peripheral neuropathy and anaphylaxis.
Tetanus immune globulin (human) is a passive immunising agent containing preformed antibodies. Serum sickness can occasionally occur especially in the past when the globulin was derived from horse sera.
The decision to administer tetanus prophylaxis in the Emergency room depends on the current immunisation status of the patient and the liability of tetanus contamination in a given wound. In this Emergency Department, the order for a “tetanus booster” usually means that tetanus polio (Salk type) inactivated vaccine is administered.
Several protocols for the administration of tetanus prophylaxis are available.
The Canadian Immunization Guide – 6th Edition – 2002 is available at
http://www.hc-sc.gc.ca/pphb-dgspsp/publicat/cig-gci/.
Prophylactic oral, IM or IV antibiotics in wound care of routine lacerations
There is NO evidence (based on many clinical studies and a meta-analysis) to support the routine use of prophylactic oral, IM or IV antibiotics to prevent wound infections after closure of routine lacerations. Antibiotics do NOT substitute for proper wound cleansing.
Prophylactic antibiotic treatment is, however, proven to be of value in the treatment of animal and human bites in particular. See D. Special Situations in Wound Care / Mammalian bites
``Use of antibiotics should be individualized based on the degree of bacterial contamination, the presence of infection-potentiating factors, such as soil, the mechanism of injury, and the presence or absence of host predisposition to infection. In general, decontamination is far more important than antibiotics. Prophylactic antibiotics should be used in most human, dog, and cat bites, intraoral lacerations, open fractures, and exposed joints or tendons.`` From Management of lacerations in the emergency department. O. Capellan and J. Hollander Emergency Medicine Clinics of North America. Volume 21, Number 1, February 2003
Airway Management
AIRWAY MANAGEMENT
ENDOTRACHEAL/ TRACHEAL SUCTIONING PROCEDURE
OBJECTIVES:
The nurse performs endotracheal and tracheostomy suctioning to:
- Maintain a patent airway.
- To improve oxygenation and reduce the work of
breathing.- To remove accumulated tracheobronchial secretions
using sterile technique.- Stimulate the cough reflex.
- Prevent pulmonary aspiration of blood and gastric
fluids.- Prevent infection and atelectasis.
EQUIPMENT:
Sterile normal saline
Suction source
Ambu bag connected to 100% O2
Clear protective goggles/mask or face shield
Sterile gloves for open suction
Clean gloves for (in-line) closed suction
Sterile catheter with intermittent suction control port or In-line
suction catheter
PROCEDURE:
1. Wash hands. Reduces transmission of
microorganisms.2. Assess patient’s need for
suctioning. Since endotracheal suctioning can be hazardous
and causes discomfort, it is not recommended in the absence
of apparent need.
Coarse breath sounds
Coughing; increased respirations
Increased PIP on ventilator
3. Don goggles and mask or face shield.
Potential for contamination4. Turn on suction apparatus and set vacuum
regulator to appropriate negative pressure. Recommend 80-120
mmHg; adjust lower for children and the elderly. Significant
hypoxia and damage to tracheal mucosa can result from
excessive negative pressure.5. Prepares suction apparatus. Secure one
end of connecting tube to suction machine, and place other
end in a convenient location within reach.6. Use in-line suction catheter or open
sterile package (catheter size not exceeding one-half the
inner diameter of the airway) on a clean surface, using the
inside of the wrapping as a sterile field.7. Prepares catheter and prevents
transmission of microorganisms. Catheter exceeding one-half
the diameter increases possibility of suction-induced hypoxia
and atelectasis.8. Prepare catheter flush solution.With in-line
catheter use sterile saline bullets to flush catheter. With
regular suctioning set up sterile solution container and
being careful not to touch the inside of the container, fill
with enough sterile saline or water to flush catheter.9. With in-line suction catheter use clean
gloves. With regular suctioning, done sterile gloves.
Maintain sterility. Universal precautions. In regular
suctioning the dominant hand must remain sterile throughout
the procedure.10. Pick up suction catheter, being careful
to avoid touching nonsterile surfaces. With nondominant hand,
pick up connecting tubing. Secure suction catheter to
connecting tubing. Maintains catheter sterility. Connects
suction catheter and connecting tubing11. Ensures equipment function. Check
equipment for proper functioning by suctioning a small amount
of sterile saline from the container. (skip this step in in-line
suctioning)12. Remove or open oxygen or humidity
device to the patient with nondominant hand. (skip this step
with in-line suctioning). Opens artificial airway for
catheter entrance. Have second person assist when indicated
to avoid unintentional extubation.13. Replace O2 delivery device or reconnect
patient to the ventilator. Hyperoxygenate and hyperventilate
via 3 breaths by giving patient additional manual breaths on
the ventilator before suctioning. Hyperoxygenation with 100%
O2 is used to offset hypoxemia during interrupted oxygenation
and ventilation. Preoxygenation offsets volume and O2 loss
with suctioning. Patients with PEEP should be suctioned
through an adapter on the closed suction system.14. Without applying suction, gently but
quickly insert catheter with dominant hand during inspiration
until resistance is met; then pull back 1-2 cm. Catheter is
now in tracheobronchial tree. Application of suction pressure
upon insertion increases hypoxia and results in damage to the
tracheal mucosa.15. Apply intermittent suction by placing
and releasing dominant thumb over the control vent of the
catheter. Rotate the catheter between the dominant thumb and
forefinger as you slowly withdraw the catheter. With in-line
suction, apply continuous suction by depressing suction valve
and pull catheter straight back. Time should not exceed 10-15
seconds. Intermittent suction and catheter rotation prevent
tracheal mucosa when using regular suctioning methods. Unable
to rotate with closed- suction method.16. Replace oxygen delivery device.
Hyperoxygenate between passes of catheter and following
suctioning procedure. Replenishes O2. Recovery to base PaO2
takes 1 to 5 minutes. Reduces incidence of hypoxemia and
atelectasis.17. Rinse catheter and connecting tubing
with normal saline until clear. Removes catheter secretions.18. Monitor patient’s cardiopulmonary
status during and between suction passes. Observe for signs
of hypoxemia, e.g. dysrhythmias, cyanosis, anxiety,
bronchospasms, and changes in mental status.19. Once the lower airway has been
adequately cleared of secretions, perform nasal and oral
pharyngeal or upper airway suctioning. Removes upper airway
secretions. The catheter is contaminated after nasal and oral
pharyngeal suctioning and should not be reinserted into the
endotracheal or tracheostomy tube.20. Upon completion of upper airway
suctioning, wrap catheter around dominant hand. Pull glove
off inside out. Catheter will remain in glove. Pull off other
glove in same fashion and discard. Turn off suction device.
Reduces transmission of microorganisms.21. Reposition patient. Supports
ventilatory effort; promotes comfort; communicates caring
attitude.22. Reassess patient’s respiratory
status. Indicates patient’s response to suctioning23. Dispose of suction liners and
connecting tubing, sterile saline solution every 24 hours and
set up new system. Decreases incidence of organism
colonization and subsequent pulmonary contamination.
Universal precautions.
PRECAUTIONS:
1. Minimize suctioned-induced atelectasis and hypoxemia:
a. Avoid using catheters larger than one-half the
diameter of the airway.b. Administer one or more postsuctioning
hyperinflations, using manual or sigh breaths on the
ventilator or ambu bag if not ventilated.2. Maintain rigorous sterile technique when suctioning the
intubated patient. Impaired pulmonary defense systems and
invasive instrumentation of the pulmonary tract predisposes
these patients to colonization and infection. Never use same
catheter to suction the trachea after it has been used in the
nose or the mouth.3. Limit the frequency of suctioning and avoid, as much as
possible, catheter impaction in the bronchial tree when the
patient is anticoagulated or when hemorrhage from suction-induced
trauma is evident.4. Minimize the frequency and duration of suctioning when
patient is on positive end-expiratory pressure (PEEP) greater
than 5 cm or continuous positive airway pressure (CPAP).
Small suctioning-induced changes may have profound effects on
these marginally oxygenated patients.5. Maintain awareness of the limitations of ET/tracheal
suctioning. Maneuvers and catheter design have been proposed
to increase the likelihood of passage into the left bronchus;
however, these have been shown to be of limited success.
Because the left main stem bronchus emerges from the trachea
at the 45-degree angle from the vertical, suction catheters
are almost inevitable passed into the right bronchus (when
they pass the carina) despite head-turning, etc.6. The use of saline installations for loosening
secretions has been controversial and recent research shows
that in fact it is detrimental and poses a greater risk of
pneumonia for the patient.
RELATED CARE:
1. Include strategies to move secretions through
peripheral airways. These measures are: appropriate hydration
and adequate humidification of inspired gases (to keep
secretions thin); coughing and deep breathing; frequent
position changes (may need rotation bed); chest
physiotherapy; and bronchodilating agents as ordered.2. Monitor the patient carefully during ET/tracheal
suctioning for ectopic dysrhythmias aggravated by suction-induced
hypoxemia and other dysrhythmias, particularly conduction
disturbances, related to catheter irritation of vagal
receptors within the respiratory tract (requires immediate
cessation of suctioning and hyperoxygenation).
POTENTIAL COMPLICATIONS
Hypoxemia
Atelectasis
Dysrhythmias
Nosocomial pulmonary tract infection
Sepsis
Mucosal trauma with increase secretions
Cardiac arrest
The American College of Emergency Physicians endorses the following principles regarding the confirmation of endotracheal tube placement in the emergency department or in the out-of-hospital setting.
![]() | General Casting Techniques The general principles of cast application are demonstrated in this video showing the application of a short arm cast. |
Casts and splints for various injuries or regions of the body
Click on the thumbnails to view movies.
Note: Due to size, some movies may take a few minutes to load.
![]() | Cast removal How to use a cast saw to safely remove a cast. |
8. Apply sterile drape
9. If female, separate labia using non-dominant hand. If male, hold the penis with the non-dominant hand. Maintain hand position until preparing to inflate balloon.
10. Using dominant hand to handle forceps, cleanse peri-urethral mucosa with cleansing solution. Cleanse anterior to posterior, inner to outer, one swipe per swab, discard swab away from sterile field.
11. Pick up catheter with gloved (and still sterile) dominant hand. Hold end of catheter loosely coiled in palm of dominant hand.
12. In the male, lift the penis to a position perpendicular to patient's body and apply light upward traction (with non-dominant hand)
13. Identify the urinary meatus and gently insert until 1 to 2 inches beyond where urine is noted
14. Inflate balloon, using correct amount of sterile liquid (usually 10 cc but check actual balloon size)
15. Gently pull catheter until inflation balloon is snug against bladder neck
16. Connect catheter to drainage system
17. Secure catheter to abdomen or thigh, without tension on tubing
18. Place drainage bag below level of bladder
19. Evaluate catheter function and amount, color, odor, and quality of urine
20. Remove gloves, dispose of equipment appropriately, wash hands
21. Document size of catheter inserted, amount of water in balloon, patient's response to procedure, and assessment of urine
Complications
The main complications are tissue trauma and infection. After 48 hours of catheterization, most catheters are colonized with bacteria, thus leading to possible bacteruria and its complications. Catheters can also cause renal inflammation, nephro-cysto-lithiasis, and pyelonephritis if left in for prolonged periods.
The most common short term complications are inability to insert catheter, and causation of tissue trauma during the insertion.
The alternatives to urethral catheterization include suprapubic catheterization and external condom catheters for longer durations.
Procedures:
Lecture Number | Topic |
0 | The Game of Science |
1 | Chemical Background: Atoms and Molecules |
2 | Solutions, Ions and pH |
3 | Biological Macromolecules |
4 | Enzymes and Metabolism |
5 | Cells: Structure and Function |
6 | Cell Division |
7 | DNA, RNA and Heredity: Genetic Code |
8 | DNA and Heredity: Transcription and Translation |
9 | Membrane Structure & Function |
10 | Membrane Electricity |
11 | The Action Potential: Nerves |
12 | Synapses and Neuromuscular Junctions |
13 | Muscle Contraction: the Sarcomere |
14 | Muscle Contraction: Mechanics |
15 | Cardiovascular System: Circulation |
16 | Cardiovascular System: the Heart as a Pump |
17 | Cardiovascular System: Electrical Activity and EKG |
18 | Respiration: Anatomy and Mechanics |
19 | Respiration: Gas Exchange in Alveoli |
20 | Oxygen Carriage in Blood |
21 | Control of Physiological Functions: Homeostasis |
22 | Physiological Adjustment to Exercise |
23 | The Skin and Temperature Control |
24 | Central Nervous System: Anatomy and Organization |
25 | CNS: Special Centers |
26 | Autonomic Nervous System |
27 | CNS: Learning and Memory |
28 | Cranial Nerves |
29 | Sensory Physiology |
30 | Eye and Vision |
31 | Ear and Hearing |
32 | Endocrines: Survey and General Principles |
33 | Endocrines: Pituitary Gland & Hypothalamus |
34 | Endocrines: Control of Ca and Phosphate |
35 | Endocrines: Control of Blood Glucose |
36 | Endocrine Disorders |
37 | Kidney: Filtration, Secretion, Reabsorption |
38 | Kidney: Regulation of Salt & Water |
39 | Regulation of Blood pH: Kidney & Lungs |
40 | How the Body Handles Drugs: Kidney and Liver |
41 | Digestion: Basic Processes |
42 | Digestion: Protein, Carbohydrates, Fats & Other Nutrients |
43 | Immune System |
44 | Reproduction: Why Sex? |
45 | Reproduction: Female System |
46 | Reproduction: Male System |
47 | Reproduction: Fertilization & Development |