Wound Repair Flashcards

1
Q

Primary intention healing

A

Healing of wound edges in direct contact

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2
Q

Secondary intention healing

A

Non-closure of a wound

  • Very dirty or infected wounds
  • Animal bites to hands, feet
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3
Q

Tertiary intention healing

A

Closure of a wound after observation (~3-5 days)

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4
Q

What is more likely to get infected? What is less likely to get infected?

A

More likely: Hands, feet

Less likely: Face, scalp

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5
Q

In prepping the wound, what should you do?

A

Thorough irrigation before closure

Pulsing works best

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6
Q

Should you soak the wound?

A

Betadine is great to prep the skin with, but don’t ever soak a wound in it bc it kills the cells that are helping the wound to heal
Peroxide can be used, but only if you’re judicious with it

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7
Q

Irrigation

A

Should remove all visible debris and devitalized tissue
Wound not in delicate or friable tissue should be scrubbed
Inspect wound to base
-Look for foreign bodies, tendon and muscle injuries through the wound
Anesthetize before inspecting

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8
Q

What is the exception to the soaking rule?

A

Soak animal bites in soap and water to dislodge rabies

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9
Q

Saline and irrigation

A

Do not reuse open bottles of saline for wound irrigation!

Common route of cross-contamination between pts

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10
Q

Skin prep

A

Apply cleansing agent in circular motion
-Start next to wound and work your way out, rotate swab stick in fingers
-Most are toxic to tissue, so keep agent out of wound
On extremity wounds, place sterile drape on table below limb
Cover wound with fenestrated drape or several drapes around field
Wash cleansing agent way from wound with sterile water or saline

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11
Q

Drying principles on skin prep

A

Want chlorhexidine to completely dry

EtOH and betadine completely kill on contact- don’t need to wait before wiping off

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12
Q

Filament type of nylon

A

Mono

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13
Q

Time required for absorption for nylon

A

Non-absorbable

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14
Q

Color of nylon

A

Black

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15
Q

Common use of nylon

A

General

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16
Q

Advantages of nylon

A

More secure knots

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17
Q

Filament type of polypropylene

A

Mono

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18
Q

Time required for polypropylene absorption

A

Non-absorbable

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19
Q

Color of polypropylene

A

Blue

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20
Q

Common use of polypropylene

A

General

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21
Q

Advantages of polypropylene

A

Strength

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22
Q

Filament type of polyglactin

A

Multi

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23
Q

Time required for polyglactin absorption

A

60-90 days

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24
Q

Color of polyglactin

A

White

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25
Common use of polyglactin
Buried
26
Advantages of polyglactin
Dissolves slowly Use for lower layer in layered closure Exception is where you don't want to lose strength (i.e., cracking open chest- use wire)
27
Filament type of chronic gut
Mono
28
Time required for chronic gut absorption
15-60 days
29
Color of chronic gut
Tan
30
Common use of chronic gut
Tongue
31
Advantages of chronic gut
Dissolves more slowly
32
Suture characteristics-size
Suture size expressed in numbers of zeros in the diameter | Larger the number, the smaller the suture
33
What sizes should you use for what parts of the body?
3-0 for trunk 4-0 for extremities 5-0 for digits 6-0 for face
34
Taper needles
Has round cross-section | Good for really deep wounds
35
Conventional needles
Triangular cross-section Pushes knot upward Further out of the hole leaves less of a scar Great for face
36
Reverse needles
Triangular cross section Sits down in the whole Leaves more of a scar, but more strength and protects the knot more
37
How to determine radius of the needle
Use a small radius for layers | Use a larger radius for a wide cut
38
Iris scissors
3-4" pair with both tips sharp | Use for cutting tissue, dissecting, and undermining
39
When should a scalpel be used instead of scissors?
For top of skin
40
Undermining
Moving lateral or parallel to the skin
41
Using a needle driver
For holding suture needle | Needle should be held at the proximal 1/3 of the shaft, perpendicular to the driver
42
(Kelly) curved hemostat
Used for clamping bleeders | Good for foreign body, retracting tissue to get to something deep
43
Tissue forceps (Pick-ups)
For grasping tissue and suture needle Have teeth to improve grip Used to lift tissue from underneath Should be held like a pencil
44
General rules for suture placement
Introduce the suture needle into the skin at a 90 degree angle Suture depth should be just above bottom of wound and should be at least as wide as it is deep Enter dermis at the same level as where you exited the other side of the wound
45
How to perform an instrument tie
Place driver between suture ends and, with non-dominant hand, wrap suture (needle end) over the instrument twice (first throw only) Grasp short end of suture with driver and pull through Repeat these steps in the opposite direction from the throw before, using only one loop around the driver Each loop you make should be wrapped toward the wound
46
How many throws should be made for the different sizes of sutures?
3-0, 4-0 monofilament: at least 4 throws 5-0, 6-0 monofilament: at least 6 throws Braided suture requires fever throws to hold Pull knot off to side
47
What are the two different ways to do a simple interrupted stitch?
Halves (start in the middle and go to one side first) | End to end
48
Simple running (baseball) stitch
Similar to simple interrupted, except that only the first and last passes are tied
49
Advantages and disadvantages of simple running stitch
Advantage: Faster Disadvantages: Harder to get tight, comes unraveled if any loop breaks
50
Locked running stitch
Variation of running stitch | Easier to keep tight
51
Vertical mattress stitch
Provides layered closure with one stitch Creates everted wound edges Deep bite is made first, followed by a more superficial bite in the same plane, but in the opposite direction They hold more tension, good for a wound over a joint
52
Horizontal mattress stitch
Good for high tension wounds or wounds that need to hold most of the tension on one side First bite is nl Move down the wound and bite back in opposite direction
53
Subcuticular stitch
``` Can do interrupted or running Avoid "train-track" scar appearance Used for surgical or very clean wounds Sutures are placed upside-down to bury knots Final tail is hidden ```
54
Special considerations
Splinting sometimes required Shaving traumatizes skin and contaminates wound NEVER shave an eyebrow Take special care to align all natural (and unnatural) landmarks If incision has to be made, try to make it along natural skin tension lines Excessively dirty wounds need recheck
55
Dog ear repair
Incision made at 45 degree angle to wound Excess tissue undermined and flap pulled across wound Excess tissue cut over original incision and sewn
56
Staples
``` Easy to use and very quick Can often be placed without anesthesia Don't require sterile technique Automatically evert wound Leave scars -In ER, primarily used in scalp ```
57
Using staples in children
Anesthetize first- still building a psyche LET for 15-20 mins, then return to staple Let them hear the sound of the staple before you start stapling
58
Tissue adhesive
Very quick, no anesthesia or sterile technique required Be very judicious about where and how you use it -May pull off sooner in an area with a lot of tension -Mostly just forehead and around the eyes, volar part of the arm Wound must be clean/dry NO ACTIVE BLEEDING Put glue over the top of the skin
59
Wound tape
Rarely used for primary wound closure More effective for reinforcing Sometimes used to re-approximate skin tears Often used in conjunction with glue Can be useful to reinforce thin skin when suturing
60
Hair ties
Sometimes used in wilderness medicine and nursing homes
61
Wound care instructions
``` Keep dry and covered for 24 hrs Dirty wounds need recheck in 48 hrs No submersion for several more days Elevate if applicable Clean 2-3 x daily with soap and water -Peroxide should only be used for face to keep scars from scabbing -Minimal abx ointment bc wound needs to be dry Watch for signs of infection APAP or NSAIDs for pain ```
62
High risk wounds
Wounds >12 hrs old at presentation- leave open Tooth-related wounds Crush wounds Heavily contaminated wounds Wounds of relatively avascular areas Wounds involving joint spaces, tendons, or bones Severe paronychia and felons (abscess in pulp of fingertip) Wounds in pts with hx of valvular heart dz Wounds in IC pts
63
Tetanus prophylaxis
A non-tetanus prone wound in a pt who has not had a Td in the past 10 yrs A tetanus prone wound in a pt who has not had a Td in the past 5 yrs Any wound in an adult pt who has not had adequate immunization
64
Tetanus prone wounds
``` >6 hrs old >1 cm deep Stellate or avulsion configuration Associated with devitalized tissue Contaminated with soil, feces, or saliva From a missile From a puncture or crush Associated with burn or frostbite ```
65
Days to removal for scalp stitches
6-8
66
Days to removal for face stitches
3-5
67
Days to removal for ear stitches
4-5
68
Days to removal for chest/abdomen stitches
8-10
69
Days to removal for back stitches
12-14
70
Days to removal for extremity stitches
8-10
71
Days to removal for hand stitches
8-10
72
Days to removal for finger stitches
10-12
73
Days to removal for foot stitches
12-14
74
When to add 2-3 days to suture removal time
``` Extensor surfaces Age >65 Diabetics Chronic steroid use Smokers ```
75
Suture removal technique
Prep area with alcohol or other skin cleanser Cut the suture with iris scissors as close to the skin as possible Tight sutures may need to be cut with a #11 blade Cut farthest from the knot possible Mattress suture needs two cuts
76
Anesthesia for I and D
Organic material present in abscess makes it difficult to numb well Field block safest way to anesthetize skin -Alternative: make superficial narrow field over top of abscess -Include area where pus seems most superficial Often helps to inject V-shaped area of anesthetic under abscess if underlying structures permit
77
Preparing the field for I and D
Apply cleansing agent in circular motion Cover wound with fenestrated drape or several drapes around field Wash cleansing agent away from field with sterile water or saline
78
Old school I and D procedure
Using #11 blade, stab downward into area of maximal fluctuance Allow most of pus to run out Widen incision to approximately 2 cm Probe wound using blunt dissection techniques to break up loculations Obtain cultures if indicated Irrigate with sterile saline Use forceps to fill cavity with 1/4 inch packing gauze (iodoform or plain)
79
After I and D procedure
If MRSA suspected, pt should be prescribed 10 days of abx -Bactrim DS 2 twice daily OR Clindamycin 300 mg 4x daily OR Doxycycline 100 mg twice daily Pain meds appropriate Pt should return in 48 hrs to have packing removed and wound checked -If wound tries to close, needs to be repacked Send pt home to irrigate Bactrim is best choice