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NA 1 > Elderly - Exam 7 > Flashcards

Elderly - Exam 7 Flashcards

1
Q

T/F Age-dependent changes result in reduced functional reserve capacity of each organ system

A

true

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2
Q

With age, _ stiffening causes _ afterload, _ myocardial O2 consumption and wall stress.

A

arterial
increased
increased

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3
Q

Changes in the elderly:
Respiratory System decreases

A

-VC
-Exp. Reserve Vol. (ERV)
-Insp, Reserve Vol. (IRV)
-Elasticity of lung (elastin)
-lung recoil
-chest wall compliance
-lung lass
-response to high CO2 or low O2
-protective airway reflexes
-upper airway muscle tone
-FEV and FEV1
-Alv. surface area
-ability to cough/clear secretions

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4
Q

Changes in the elderly:
Respiratory system increases

A

-lung (alveolar) compliance
-dead space
-closing capacity + closing volume
-MV
-Residual Vol (RV)
-FRC
-V/Q mismatch
-Barrel Chest
-WOB
-aspiration risk

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5
Q

T/F Total lung capacity is decreased in elderly patients

A

FALSE
unchanged!!!!

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6
Q

Changes in the elderly:
Neuro system decreases

A

-PNS tone (afferent responses)
-Myelinated peripheral neurons
-amount of dendrites and synapses
-Activity of GABA, ACh, NE, and Dopamine
-brain mass(0.1-1%/yr)
-Catecholamine sensitivity
-Adrenergic Sensitivity (Beta)
-Autonomic Function
-Thermoregulation

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7
Q

Changes in the elderly:
Neuro system(misc) increases

A

-SNS tone (plasma catecholamines)
-hypothermia
-shivering
-vasoconstriction
-wound infections
-Bleeding

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8
Q

T/F Number of neurons decreases with age

A

false, no change

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9
Q

Changes in the elderly:
Cardiovascular decreases

A

-Compliance (AVM)
-Conduction
-Chronotropic and Inotropic response
-Baroreceptor function
-Diastolic Function
-SV
-Blood Volume (~20-30%)
-HR (220-age=MAX)
-CO

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10
Q

Changes in the elderly:
Cardiovascular increases

A

-myocardial hypertrophy (LVH)
-SVR/ afterload
-HTN (cardiac workload)
-Valve calcifications (AS)
-Arrhythmias
-PP
-Circulation time
-Clotting

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11
Q

T/F Systolic function increasing is the reason for increased SVR in the elderly.

A

false, systolic function does NOT change with age.
-many other factors increasing SVR

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12
Q

Changes in the elderly:
Musculoskeletal decreases

A

-lean body mass
-total body water
-basal metabolic rate

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13
Q

Change in the elderly:
Musculoskeletal increases

A

-surface area to body mass ratio
-kyphosis/lordosis
-OA
-total body fat

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14
Q

Changes in the elderly:
Renal/Endocrine decreases

A

-renal blood flow
-renal mass (250->180g)
-Cr Clearance
-GFR (10% per decade past 40 or 1mL/min/m/yr)
-ability to concentrate urine
-ability to balance Na+ (HYPONATREMIA)
-elimination of hydrophilic drugs
-response to acid load (ammonium secretion)
-Aldosterone and ADH production
-ability to compensate for hyperglycemia

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15
Q

Changes in the elderly:
Renal/Endocrine increases

A

-insulin resistance
-urologic disease risk (prostate/bladder)
-hypothyroidism

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16
Q

How would you expect serum creatinine to change in elderly patients and why?

A

No change
-decreased skeletal muscle mass and decrease in GFR balance out

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17
Q

Changes in the elderly:
Hepatic decreases

A

-hepatic mass (2.5->1.5% of body mass)
-hepatic blood flow (40%)
-hepatic drug metabolism
-plasma protein binding
-albumin production (acidic drug binding)
-PChE production
-Phase 1 reactions
-1st pass metabolism
-recovery from IA
-incidence of PONV

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18
Q

Changes in the elderly:
Hepatic increases

A

-Alpha-1 Acid Glycoprotein production (basic drug binding)
-incidence of NAFLD

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19
Q

T/F Enzyme function and phase II reactions decrease in the elderly

A

false, unchanged

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20
Q

Changes in the elderly:
Spinal decreases

A

-response to test doses (EPI)
-volume of CSF

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21
Q

Changes in the elderly
Spinal increases

A

-sensitivity of dura to LA
-difficulty of block placement
-specific gravity of CSF
-spread of LA
-response to sympathectomy

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22
Q

VTE risk in elderly pts is increased due to increased incidence of Virchow’s triad:

A

-venous stasis
-hypercoagulable state
-aberrant blood flow

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23
Q

_ (systolic/diastolic) function is preserved while _ (systolic/diastolic) function is diminished in elderly pts.

A

systolic preserved
diastolic dysfunction

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24
Q

Causes of venous stasis seen in elderly pts:

A

-varicose veins
-postmenopausal estrogen replacement therapy
-smoking
-CHF
-immobility

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25
Q

To maintain CO, elderly pts rely on which 2 mechanisms?

A

-preload
-atrial kick

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26
Q

MAX HR equation:

A

MAX HR = 220- age in yrs

ex) 220 - 65 years = 155

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27
Q

Most common arrhythmia seen in elderly pts:

A

Afib

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28
Q

How does having A fib lower CO?

A

eliminates atrial kick, decreasing L vent filling `

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29
Q

What maintains perfusion when someone has aortic stenosis?

A

NSR
good diastolic volume

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30
Q

A _ BP and _ HR should be avoided in pts with aortic stenosis to prevent ischemia from reduced length of diastole and poor perfusion.

A

low BP
high HR

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31
Q

Decreased beta adrenergic sensitivity causes a lower _ heart rate, _ cardiac output, and limited responsiveness to beta agonists such as _

A

lower max HR
decreased CO
poor response to DOBUTAMINE

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32
Q

Poor response to baroreceptors in elderly can predispose them to having _ hypotension

A

orthostatic

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33
Q

T/F Restrictive, obstructive lung disease, and sleep apnea incidence increases with age?

A

true

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34
Q

What puts elderly pts at higher risk of atelectasis?

A

MECHANICAL CHANGES
-decreased vital capacity
-decreased pulmonary reserve
-increased WOB
-increased RV
-reduced FRC compared to closing capacity

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35
Q

Strategies to minimize atelectasis risk in elderly pts:

A

-early ambulation
-chest PT
-incentive spirometry

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36
Q

4 ways CRNA can prevent aspiration in elderly pts

A

-neuraxial or regional with minimal sedation instead of GA
-avoid intermediate/long-acting NMBA
-opioid sparing methods
-neutralize stomach with nonparticulate antacids (Bicitra)

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37
Q

Decrease in which two muscles’ tone predisposes old pts to having airway obstructions when they sleep?

A

-hypopharyngeal
-genioglossal

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38
Q

Age related decrease in kidney mass is from _ atrophy which is due to _

A

cortical atrophy
glomerulosclerosis

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39
Q

T/F A “normal” value of serum creatinine in an elderly pt may be masking a reduced GFR and obscuring ischemic and nephrotoxic injuries.

A

True
-serum creatinine isnt a great indicator of renal function

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40
Q

What increases UTI risk in elderly pts?

A

-urine retention from bladder/urologic diseases
-vaginal atrophy from decreased estrogen in women
-pelvic prolapse in women

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41
Q

Because of poor hepatic blood flow, older pts more slowly metabolize drugs cleared by phase 1 pathways which include:
-also give some drugs that are cleared this way-

A

-oxidation
-reduction
-hydrolysis via CYP450 system

-ketamine, morphine, fentanyl, sufentanil, lidocaine, flumazenil

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42
Q

Phase 2 metabolic pathways such as _ and _ are not affected by age.

A

acetylation and conjugation

43
Q

Beers criteria recommend avoiding which PONV prophylaxis meds due to AMS risk? Which one is better to use instead?

A

-prochlorperazine
-promethazine
-metoclopramide (except in gastroparesis)
-corticosteroid

-ondansetron (watch QT)

44
Q

Muscle function and _ decreases faster with age than muscle _ does.

A

quality
quantity

45
Q

T/F Older pt’s total body fat increases because their subcutaneous fat reserves increase too.

A

false, they lose their subcutaneous fat reserves, causing temp dysregulation

46
Q

Basal core temp in old pts about _ *C less than adults 25-64

A

0.4*C

47
Q

Which areas of the brain do older adults experience less neuronal activity?

A

-hippocampus
-frontal/prefrontal cortex
-temporal lobe

48
Q

Cortical gray matter thins at a rate of _ - _ % per year

A

0.5-1%

49
Q

_ is the decline in memory and cognition from frank neuron loss that interferes with ADLs and has many subtypes

A

dementia

50
Q

Causes of specific types of neuron destruction
-vascular dementia
-Alzheimer’s
-Lewy Body dementia

A

Vasc: hemodynamic abnormalities

Alz: abnormal tau and beta amyloid proteins (GLOBAL neuron death)

LB: abnormal alpha-synuclein deposits

51
Q

Parkinson’s risks and related consequences in elderly pts:

A

immobility - DVT

dysphagia and resp depression - aspiration and pneumonia

urine rtn - UTI

psychiatric complications - delirium

52
Q

Concerns with certain meds common with Parkinson’s disease

A

Antiemetics (metoclopramide and promethazine) - antagonize dopamine, worsen EPS

MAOI’s - increase risk of serotonin syndrome with certain opioids (tramadol)

Propofol - induces dyskinesia (manage with decadron)

53
Q

Mood disorders such as _ are often underrecognized and predispose old pts to having POCD, cardiac events, increased postop opioid use, and poor postop outcomes.

A

depression

54
Q

Do we automatically suspend DNR orders for surgery?

A

nah, but it still happens…

55
Q

Legal definition of capacity:

A

-ability to communicate treatment choice

-comprehension of info given by physicians

-voice understanding of their medical condition, options for treatment, and outcomes

-can conduct rational discussion about treatment options

56
Q

Most successful method to reduce delirium risk in elderly?

A

multidisciplinary nonpharm programs
-“HELP” program
-reorientation, early mobilization, promotion of wake/sleep cycles

57
Q

T/F It’s ok to use antipsychotics as a prophylaxis for delirium

A

false, only if they’re a danger to self/others

58
Q

Reduce MAC by _ % per decade after age _

A

6% after age 30
-8% for N2O

59
Q

Delirium prevention strategies:

A

-educate staff
-multi disciplinary nonpharm methods
-daily activity
-reorientation
-family/friend at bedside
-sleep hygiene
-early mobility
-visual/hearing impairment adaptations
-nutrition + fluid intake
-pain mgmt
-appropriate med use
-O2 PRN
-prevent constipation
-minimize pt tethers (foley, EKG leads, SCD,etc)

60
Q

BEERs list meds to avoid in delirious pt:

A

-antipsychotics (only give if agitated and harmful to self/others)
-BENZOS (worsen delirium)

61
Q

Factors associated with high risk of functional decline:

A

-cognitive impairment
-need for surrogate consent
-use of mobility aids
-hx of falls

62
Q

Aging may cause lower sensitivity to for low intensity pain, specifically to _

A

heat

63
Q

Beers List Multimodal pain mgmt drugs to avoid in old pts:

A

-gabapentin
-long-acting opioids

64
Q

T/F Regional has been shown to decrease incidence of postop cognitive disorders in the elderly

A

false, no technique has

65
Q

Meds that have potential neuro S/E that are commonly used in periop period also on Beer’s list:

A

-Diphenhydramine (highly anticholinergic, confusion)
-Hydroxyzine (highly anticholinergic, confusion)
-Scopolamine (highly anticholinergic)
-Amitriptyline (highly anticholinergic, sedating)
-Antipsychotics (inc risk CVA and death in dementia pt)
-Benzos (high sensitivity, poor metabolism, fall risk, delirium risk)
-Metoclopramide (EPS s/e in old pts)
-Pethidine (bad analgesic, neurotoxic)
-Pentazocine (cns changes ,confusion, hallucination)
-NMBD (poorly tolerate, anticholinergic s/e)
-Meperidine (Demerol)

66
Q

T/F Cognition and capacity are the same thing

A

false, may overlap but capacity is more complex

67
Q

Classic tool used to assess alcohol use in pts:

A

CAGE questionnaire
-yes to any of the Q trigger possible detox protocols, thiamine and folic acid supps

68
Q

Depression assessment tool for elderkly:

A

Patient Health Questionnaire-2
-“yes” to any Q = positive screen, need for further investigation

69
Q

Frailty assessment tools:

A

-Frailty phenotype (wt loss, grip strength, exhaustion, low phys activity, 15ft walk speed)
-Frailty index/deficit accumulation (tons of measures of comorbidity, ADL, etc)
-Modified Frailty index (Hx DM, COPD or PNA, MI, PCI/angina, HTN on meds, PVD, dementia, TIA or CVA, CVA with deficit, ADLs)
-Gait speed (5m gait 6+ sec)
-Timed up and go (10+s, 11-14, or 15 s)
-Falls(6 mo hx of falls)
-Robinson ( Katz score, Mini Cog, Charlson index, anemia <35%, albumin <3.4, hx falls)

70
Q

Prehabilitation for frail older pts includes:

A

-nutrition support
-exercise

71
Q

T/F Frailty is a risk factor for delirium

A

true

72
Q

Brief Cognitive screening tools:

A

-Minicog ~ 2-4 min
-Montreal Cognitive Assessment (MoCA)~10-15 min
-Mini Mental State Exam (MMSE) ~7-10min
-Clock Drawing Test ~<2 min
-Verbal Fluency test ~ 2-4min
-Cognitive Disorder Exam (CODEX) ~3 min

73
Q

Total body water decreases by 10-15%; lean muscle mass decreases; body fat (NOT subQ fat) increases which causes _ - soluble medications with a larger volume of distribution to last longer

A

lipid-soluble

74
Q

With age, neuronal tissue _, receptor number _, and receptor sensitivity _

A

decreases
decreases
increases

75
Q

ASA recommends old pts DC herbal supps - _ weeks preop

A

1-2 wks

76
Q

Differences between Delirium and POCD
-definition

A

Delirium: ACUTE, fluctuating confusion with altered attention/awareness that can’t be explained by preexisiting or developing dementia

POCD: worsening preformance on neuropsych tests postop compared to preop baseline

77
Q

Differences between delirium and POCD
-domain measured

A

Delirium: inattention, disorganized thinking, altered LOC

POCD: memory and exec function

78
Q

Differences between delirium and POCD
-population

A

Delirium: not unique to surgical pts, affects ALL ages

POCD: pts after anesthesia/surgery, assoc with age

79
Q

Differences between delirium and POCD
-assessment tools

A

Delirium: CAM/ CAM-ICU, 3D CAM

POCD: Detailed neurological testing

80
Q

Differences between delirium and POCD
-time assessed

A

Delirium: after surgery (usually 1-3 days peak)

POCD: 1-3 mo after surgery resolves within 6-12 mo but can be lifelong

81
Q

Differences between delirium and POCD
-epidemiology

A

Delirium: increased MORBIDITY

POCD: increases MORTALITY

82
Q

Hepatic drug metabolism is slow due to decreased mass, blood _ & perfusion from fewer _

A

flow
hepatocytes

83
Q

GFR decreases by _mL/min/m2 per year after 40

A

1ml/min/m2

84
Q

Risk factors for postop cognitive dysfunction

A

Cardiac Surg(18%=0pts>43%>60%>87% per pt)
-previous CVA
-depression
-abnormal albumin
-MMSE score 24+

General/Ortho/Gyn surgery (0pt=<1%,>8%>19%>45% per pt)
-70+yo
-alcohol abuse
-poor cognitive status
-poor functional status
-abnormal lytes and/or BG
-noncardiac thoracic surgery
-aortic aneurism surgery

85
Q

Postop delirium risk factors:

A

-old age
-male
-dementia
-ETOH
-depression
-longer case
-poor function status
-Parkinson
-CV disease
-metabolic disease
-AntiCh drugs
-ICU admit

86
Q

POCD risk factors:

A

-low education level
-longer case
-depression
-preop cognitive decline
-postop infection

86
Q

T/F POCD has specific diagnostic criteria

A

false,
diagnosed by exclusion, requires previous preop cognitive test
-no cure, preventative strategies

87
Q

Are NMBA affected by age?

A

Generally no, roc and vec may have longer duration from less hepatic/renal function tho

88
Q

RA vs GA benefits

A

-less thromboembolisms of all kinds
-less blood loss
-less hypoxic risk
-less opiate use usually

89
Q

Why give less Thiopental in elderly?

A

Vd decreased, serum level increases

90
Q

Why give less etomidate in elderly?

A

delayed metabolism/excretion

91
Q

Why give less propfol in elderly?

A

increased brain sensitivity, decreased clearance

92
Q

Why give less benzo in elderly?

A

increased brain sensitivity, less clearance

93
Q

Opiates are all _ times more potent in elderly because:

A

2x
increased sensitivity

94
Q

Why give less morphine in elderly?

A

less clearance

95
Q

What is the main plasma protein of acid and base drugs?

A

Acid: albumin
Base: A1 glycoprotein

96
Q

Which plasma binding increases and decreases with age?

A

Increases: A1 glycoprotein
Decreases: Albumin

97
Q

T/F Blood loss is associated with delirium

A

true

98
Q

Only opioid consistently assoc with delirium:

A

Meperidine (Demerol)

99
Q

Most common postop system failures:

A

-neuro
-pulm
-cardiac

100
Q

How does the potency of opioids (alfentanil, sufentanil, remifentanil, and fentanyl) compare to older adults versus younger adults?
A. half as potent in older adults
B. 10x more potent in older adults
C. same potency
D. 2x more potent in older adults
E. can’t be compared

A

D. 2x more potent

101
Q

How much is the MAC for IA decreased per decade past 40 yo?
A. 1%
B. 9%
C. 4%
D. 2%
E. 6%

A

E. 6%

102
Q

What affect does age have on closing capacity in the lungs?
A. closing capacity decreases with age
B. closing capacity stays the same
C. closing capacity increases with age
D. closing capacity = ERV over age 65
E. closing capacity < FRC over age 65

A

C. closing capacity increases with age

NA 1 (31 decks)

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