Functions of Skeletal Muscle
Movement, Posture and Positioning, and Generation of Body Heat
Body Mechanics
Combined effort from the musculoskeletal and nervous systems to maintain posture, alignment, and balance.
Three key principles of body mechanics :
body alignment
balance
body movement
Optimal posture does what
supports the spine, muscles, and joints, which increases strength, reduces fatigue, and uses less energy
Line of Gravity
passes thru body and divides it into 2 equal halves
vertical line should run from the top of the head and straight down through the ear lobe, shoulder, trunk, hip, femur, knee, and ankle
Proper body mechanics for picking up something
stand or move as close to the object as possible
keep the abdominal muscles contracted and the lower back in its normal position
maintain the head upright with shoulders raised up
bow the hips slightly and squat
dont twist torso, always pivot or side step
push up from the knees and use the momentum to lift the object
risk factors in the workplace
Practice controls: lighting, noise, transfer lifts, carts, furniture, whole-body vibrations, exposure to heat/cold.
Physical characteristics: posture, duration, force, velocity, heavy exertion, repetition, time, lunch/rest breaks, recovery time.
Environmental hazards: mental stress, physical stress, workload hours (shift, overtime), falls, slips, exposure to hazards
steps of moving a client up in bed
1. assess client level of mobility
2. get lift assitance
3. lock the wheels of the bed
4. raise the clients bed
5. position the client's arms across their chest
6. use the draw sheet to move client
7. lower the clients bed to the lowest position
Prolonged immobility of bones causes
reduced mechanical load and stress on bones, contributing to a loss of mass, density, and strength
Disuse Osteoporosis
occurs when bones have become thinner and weaker as a result of prolonged bed rest.
Muscle mass maintenance reuqires
sufficient supply of O2 and Glucose
Sarcopenia
loss of lean muscle mass and deterioration of the twitch fibers in voluntary muscle ( responsible for contraction speed and ability to rest fatigue)
Muscles to first undergo sacropenia are
leg muscles due to their constant exertion from carrying your fatass all day
changes to structure and function of tendons, ligaments, and cartilage begin to occur after ___ days of bedrest. due to alterations of
4 , collagen fibers
Immobility leads to
changes in tissue tension, elasticity, and shape, leading to joint stiffness and decreased range of motion, especially in the extremities
Prolonged immobilization effects joint by
causing formation of abnormal tissue within and between joint spaces, which restrict nourishment
Joint Contractures
abnormal fixations of the joints that occur as a result of changes to muscles and connective tissue
Foot drop
a tyoe of joint contracture that results in a partial or total inability to pull toes up towards head (dorsifelxion)
damage to peroneal nerve
Orthostatic hypotension
A decrease in blood pressure that occurs upon standing, especially from a lying or sitting position. A significant drop in the blood pressure caused by a change in position.
Sign of Orthostatic hypotension
A decrease in systolic blood pressure of 20 mm Hg or more.
OR
A decrease in diastolic blood pressure of 10 mm Hg or more within 3 minutes of changing to a sitting or standing position.
Atelectasis
Collapse of airways and small sections of the lung as a result of shallow breathing. The collapsing of the lung during expansion.
supine positioning can cause
gastroesophageal reflus
fecal impactation
urinary retention
renal calculi
restrictive bood flow (tissue, lymph nodes,
skin breakdown (due to inc exposure to moisture from sweat, wound drainage, and incontinece)
Steps in mobility assessment
1. extend arm to shake hands with clients farther upper extremity
2.instruct client to sit on edge of bed for at lease 2 minutes
3.instruct client to extend one leg, flex ankle, and point toes
4.request client to stand at the bedside for at least 5 seconds
5.request client to walk in place
6.ask client to take a few steps forward and then backwards
when using a cane, the nurse should check that
optimal height
when pt standing with arms relxed, top of cane should be level with inside of wrist
when pt grasping cane, slbow bent at 15-30 degrees
when using a walker, PT should walk foward using which foot first
weak foot first
Prone
characteristics: Lying on abdomen with the head turned to one side; hips are unflexed
advantages:Allows for full extension of the hip and knee joints to prevent contractures
Promotes drainage of secretions
Supine or Dorsal Recumbent
Characteristics:Lying flat on the back, possibly with knees bent
Advantages:Enables visualization of the client for examination
Lateral
Characteristics: Side-lying; the hips and knees are flexed with a pillow separating the knees/legs
Designated as left lateral or right lateral depending on which side of the client is in contact with the bed
Advantages:Promotes spinal alignment
Reduces pressure on the sacrum and heels
Fowler
Characteristics:Semi-seated or reclined position with the head of the bed elevated 45 degrees; knees may be flexed
Semi-Fowler: Head of the bed is elevated 15 to 30 degrees
High-Fowler: Head of the bead is elevated 60 to 90 degrees
Advantage: Promote lung expansion
Lateral semi-prone recumbent
Charcateristics: Placed between the prone and lateral positions, with the top leg flexed up toward the chest and supported with a pillow; the bottom arm is placed to the side of the torso, not underneath
Advantages:Reduces pressure on the sacrum and hips
Promotes drainage of secretions
Trendelenburg
Characteristics:Lying flat on the back, with the foot of the bed above the head of the bed
Reverse Trendelenburg: The foot of the bed is lower than the head of the bed
Advantages:Promotes venous return
Promotes drainage of the lower lobes of the lungs
Maximum Assistance
The client cannot bear weight, assist, or maintain a seated position. Use a total mechanical lift or sling.
Moderate Assistance
The client can maintain a seated position and has some upper extremity strength but lacks enough lower extremity strength to transfer safely. Use sit-to-stand powered lifts and assistive devices.
Minimum Assistance
The client can rise from a seated position and sustain a steady stand. Use a gait belt and ambulation assistive devices as indicated.
No assistance
The client can stand, march or step in place, and walk without any help.
Side/ Transfer Board
Clients who require this type of transfer are usually immobile or acutely ill and unable to assist. A minimum of three to four staff members should be used when performing this type of transfe
Pivot Disc
used for sitting or standing transfers for clients who are cooperative and have weight-bearing capabilities
Used for clients who can stand but have difficulty moving their feet. Enables the health care personnel to easily rotate the client to the desired position
Mechanical sit to stand lift
This type of lift would be appropriate for a client who possesses the lower extremity strength and balance required to maintain an upright position, once that position is achieved
usually for surgical PTs or trauma that have impeded ability to left body upright
Flexion
bend; reduce the angle between the bones
extension
straighten the limb
abduction
move away from baseline
adduction
bring closer to baseline
pronation
turning to face backwards
Supination
turning to face fowards
circumduction
circular motion
rotation
side to side
inversion
turn inward
eversion
turn outward
(T/F)that all adults should engage in moderate-intensity aerobic activities for at least 150 min per week (30 min per day, 5 days per week)
True
Aerobic exercises
increase both the heart rate and the respiratory rate
EX:ballroom dancing, water aerobics, swimming laps, brisk walking (2.5 miles), hiking, and slow bike riding at 10 miles per hour