Chapter 44: Bandaging, External Coaptation, and External Devices for Companion Animals Flashcards
How long does it take for joint contracture to occur while an animal is in a Velpeau sling?
14 days
What are four things to know about elbow hygromas?
Most common in large and giant breed dogs younger than 2 years of age
The hygroma most often contains a serous fluid
The most effective treatment is neoprene sleeves providing padding and protection
Injections of corticosteroids is contraindicated
Tell me three things about the Modified Robert-Jones bandage:
Good if severe inflammation is expected.
Appropriate for temporary support of fractures or dislocations
Padding is applied to a thickness of 1/2 to 2 cm
Tell me two things about the Thomas-Schroeder splint:
Can counteract muscle forces and immobilize joints and certain fractures.
(Can provide traction on humerus, radius and ulna, femur or tibia)
The stockinet should exceed the cast both proximally and distally by 1 to 2 inches.
True or false? Tension in a bandage is described by Laplace’s law.
True.
What are the 3 types of joint injuries?
Sprains, luxations, fractures.
Sprains are the most common injury in performance dogs, sprains to which joint are most likely to go undiagnosed?
Carpal joints
What is a method of treating contracture?
Static progressive bracing
How long each day are static progressive braces (for treating contracture) generally used?
Worn for 30 minutes two to three times per day
What is the name of the law that states pressure applied at each point under a bandage is proportional to (NxT)/(RxW)?
LaPlace’s law
N = # layers
T = bandage tension
R = radius of curve
W = width of bandage material
pressure gradient naturally decreases as you get proximal (wider R)
What is the name of the law for laminar flow; Q = dPπr^4/(8nL) where Q = flow
What does increase drain diameter do to flow?
Poiseuille’s law
dP = pressure difference between 2 ends of drain
r = radius of tube
n = viscosity of fluid
L = drain length
aka doubling the drain diameter increases flow 16 fold.
True of false: red rubber and latex are inert for drain materials.
False, they cause the most inflammatory response.
Polyethylene, polyvinyl chloride, and silastic are fairly inert
T/F: A incidence of seroma formation after a clean surgical procedure is significantly less if the closed suction drain is removed after fluid production falls below 0.2mL/kg/hr
True
Compressive reservoirs lose suction rapidly as they fill to what % capacity?
20-30%
Rolling generates more negative pressure/suction than squeezing the bulb.
The flow of fluid through a drain lumen is _______ proportional to the drain length?
Inversely = shorter drain -> better flow rate
