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8. A patient shown to have wasting at the interdigital web spaces, experiences numbness of the ring finger and exhibits Wartenberg sign on physical examination most likely is suffering from: A. Cubital tunnel syndrome. B. Carpal tunnel syndrome. C. Compartment syndrome. D. Rheumatoid arthritis.
CHAPTER 44
Surgery of the Hand and Wrist
Answer: A
The ulnar nerve also innervates the dorsal surface of the small finger and ulnar side of the ring finger, so numbness in these areas can be explained by cubital tunnel syndrome. The patient may also report weakness in grip due to effects on the flexor digitorum profundus (FDP) tendons to the ring and small fingers and the intrinsic hand muscles. Patients with advanced disease may complain of inability to fully extend the ring and small finger interphalangeal (IP) joints.
Physical examination for cubital tunnel syndrome begins with inspection. Look for wasting in the hypothenar emi­nence and the interdigital web spaces. When the hand rests flat on the table, the small finger may rest in abduction with respect to the other fingers; this is called Wartenberg sign. Tinel sign is often present at the cubital tunnel. Elbow flexion test will often be positive. Grip strength and finger abduction strength should be compared to the unaffected side. Froment sign can be tested by placing a sheet of paper between the thumb and index finger and instructing the patient to hold on to the paper while the examiner pulls it away without flexing the finger or thumb (this tests the strength of the adductor pollicis and first dorsal interosseous muscles). If the patient must flex the index finger and/ or thumb (FDP-index and flexor pollicis longus [FPL], both median nerve supplied) to maintain traction on the paper, this is a positive response. (See Schwartz 11th ed., p. 1944.)
9. Necrotizing infections: A. Often present with pain out of proportion to findings. B. Often have discharge present. C. Debridement should begin following confirmation
by way of radiograph findings.
D. Oral antibiotics should begin immediately.
Answer: A
Bacteria spread along the fascial layer, resulting in the death of soft tissues, which is in part due to the extensive blood ves­sel thrombosis that occurs. An inciting event is not always identified. Immunocompromised patients and those who abuse drugs or alcohol are at greater risk, with intravenous drug users having the highest increased risk. The infection can by mono- or polymicrobial, with group A β-hemolytic Streptococcus being the most common pathogen, followed by α-hemolytic Streptococcus, S. aureus, and anaerobes. Prompt clinical diagnosis and treatment are the most important fac­tors for salvaging limbs and saving life. Patients will pres­ent with pain out of proportion with findings. Appearance of skin may range from normal to erythematous or maroon with edema, induration, and blistering. Crepitus may occur if a gas-forming organism is involved. “Dirty dishwater fluid” may be encountered as a scant grayish fluid, but often there is little to no discharge. There may be no appreciable leuko­cytosis. The infection can progress rapidly and can lead to septic shock and disseminated intravascular coagulation. Radiographs may reveal gas formation, but they must not delay emergent debridement once the diagnosis is suspected. Intravenous antibiotics should be started immediately to cover gram-positive, gram-negative, and anaerobic bacteria. Patients will require multiple debridements, and the spread of infection is normally wider than expected based on initial assessment. Necrotizing myositis, or myonecrosis, is usually caused by Clostridium perfringens due to heavily contami- nated wounds. Unlike necrotizing fasciitis, muscle is univer­sally involved and found to be necrotic. Treatment includes emergent debridement of all necrotic tissue along with empir­ical intravenous antibiotics. (See Schwartz 11th ed., p. 1949.)
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10. The majority of acute cases of infections flexor tenosyno­vitis (FTS) are due to: A. Systemic lupus erythematosus. B. Chronic inflammation as a result of diabetes. C. Rheumatoid arthritis (RA). D. Purulent infection after penetrating trauma.
11. All of the following are TRUE about felon EXCEPT: A. Abscess of the fingertip that is caused by penetrating
trauma.
B. Staphylococcus aureus is the most common infectious
agent.
C. Incision and drainage should be through a longitudi-
nal incision.
D. The infection extends to the nail bed, and may require
removal of the nail.
Answer: D
FTS is a severe pathophysiologic state causing disruption of normal flexor tendon function in the hand. A variety of eti­ologies are responsible for this process. Most acute cases of FTS are due to purulent infection. FTS also can occur second­ary to chronic inflammation as a result of diabetes, RA, crys­talline deposition, overuse syndromes, amyloidosis, psoriatic arthritis, systemic lupus erythematosus, and sarcoidosis. (See Schwartz 11th ed., p. 1950.)
Answer: D
A felon is a subcutaneous abscess of the fingertip and is most commonly caused by penetrating trauma. S. aureus is the most common pathogen. The fingertip contains multiple septa connecting the distal phalanx to the skin. These septa are poorly compliant, and presence of an abscess will increase pressure and lead to severe pain and tissue death. Patients will experience erythema, swelling, and tenderness of the volar digital pad. Oral antibiotics may resolve the infection if diag­nosed very early, but incision and drainage is indicated when fluctuance is identified. A digital block should be performed, followed by a longitudinal incision over the point of maximal fluctuance (Fig. 44-2). (See Schwartz 11th ed., p. 1951.)
CHAPTER 44
Surgery of the Hand and Wrist
FIG. 44-2. Felon. A. Lateral view of the digit
showing fluctuance between the skin of the pad and the underlying distal phalanx bone. B. The authors prefer to drain felons with a longitudinal incision (dashed line) directly over the area of maximal fluctuance.
12. All hand infections EXCEPT the following require surgi­cal management. A. Paronychia. B. Felon. C. Cellulitis. D. Osteomyelitis.
BA
Answer: C
All hand infections other than cellulitis will require surgical management. Clinical examination, particularly noting the area of greatest tenderness and/or inflammation, is the single most useful diagnostic tool to localize any purulence requir­ing drainage. Specific recommendations for differentiating among the possible locations of hand infection are included in the diagnostic algorithm shown in Fig. 44-3. (See Schwartz 11th ed., pp. 1947–1948.)
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Hand inflammation
Plain X-rays
CHAPTER 44
Surgery of the Hand and Wrist
Cellulitis
admit, IV Abx
serial exam
No improvement
in 48 hours
MRI if no
fluctuance
Localized fluctuance
Entire finger
Kanavel’s
signs present
Pyogenic FTS
Nondiagnostic
Site of fluctuance
Dorsal
Subcutaneous
abscess
seYoN
Partial finger
Centered
on joint
Pain with axial loading of joint
Pyogenic vs.
crystalline
arthritis
Consider
arthrocentesis
Fracture
Palm
Distal
Between
digits
Web space
abscess
Foreign body
Ulnar to
SF MC
Loss of
palmar
concavity
Radial to
IF MC
Hypothenar
abscess
Midpalm abscess
Thenar
abscess
FIG. 44-3. Diagnostic algorithm. Diagnostic workup for a patient with hand inflammation to evaluate for
infection. See text for details about particular infectious diagnoses. Abx = antibiotics; FTS = flexor tenosynovitis; IF MC = index finger metacarpal; MRI = magnetic resonance imaging; SF MC = small finger metacarpal.
13. Treatment of ganglion cyst consists all of the following EXCEPT: A. Splinting and pressure. B. Aspiration. C. Surgical excision. D. Observation.
14. The most common primary malignant tumor of the hand is: A. Melanoma. B. Basal cell carcinoma. C. Squamous cell carcinoma (SCC). D. Epithelioid sarcoma.
Answer: A
Treatment consists of observation if asymptomatic. If symptoms exist or the patient desires removal for cosmetic appearance, aspiration of the cyst may be performed with a successful cure rate ranging from 15% to 89%. The benefit of injected steroids is inconclusive. Aspiration of a volar wrist ganglion cyst can be dangerous due to the potential of injur­ing neurovascular structures. Open excision and arthroscopic excision of the cyst stalk are surgical options for cysts that are not amendable to aspiration. A recent meta-analysis reported recurrence rates after either needle aspiration, open excision, and arthroscopic excision as 59%, 21%, and 6%, respectively. (See Schwartz 11th ed., p. 1953.)
Answer: C
Squamous cell carcinoma (SCC) is the most common primary malignant tumor of the hand, accounting for 75% to 90% of all malignancies of the hand. Eleven percent of all cutaneous SCC occur in the hand. It is the most common malignancy of the nail bed. Risk factors include sun exposure, radiation exposure, chronic ulcers, immunosuppression, xeroderma pigmentosa, and actinic keratosis. (See Schwartz 11th ed., p. 1955.)
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Plastic and Reconstructive Surgery
1. All of the following are TRUE about split-thickness skin grafts EXCEPT: A. Degree of contraction dependent on amount of
dermis in graft. B. High reliability of take. C. Healing with abnormal pigmentation more common
in thin than thick grafts. D. Meshing grafts improves their ultimate cosmetic
appearance.
2. Which of the following definitions is incorrect? A. Flap composition: description of the tissue compo-
nents within the flap
B. Flap contiguity: the position of a flap relative to its
recipient bed
C. Pedicle: bridge of tissue that remains between a flap
and its source; blood vessels that nourish a flap
D. Free flap: flaps that are completely detached from the
body prior to their preimplantation with microvascu­lar anastomoses
Answer: D
Many of the characteristics of a split-thickness graft are deter­mined by the amount of dermis present. Less dermis trans­lates into less primary contraction (the degree to which a graft shrinks in surface area after harvesting and before grafting), more secondary contraction (the degree to which a graft shrinks during healing), and better chance of graft survival. Thin split grafts have low primary contraction, high second­ary contraction, and high reliability of graft take, often even in imperfect recipient beds. Thin grafts, however, tend to heal with abnormal pigmentation and poor durability compared with thick split grafts and full-thickness grafts. Split grafts may be meshed to expand the surface area that can be cov­ered. (See Schwartz 11th ed., pp. 1975–1976.)
Answer: B
The composition of a flap describes its tissue components. The contiguity of a flap describes its position related to its source. Distant flaps are transferred from a different anatomic region to the defect. They may remain attached to the source anatomic region (pedicle flaps) or may be transferred as free flaps by microsurgery. These are completely detached from the body, and their blood supply is reinstated by microvas­cular anastomoses to recipient vessels close to the defect. The term pedicle was originally used to describe a bridge of tissue that remained between a flap and its source, similar to how a peninsula remains attached to its mainland. However, as knowledge of flap blood supply and (micro)vascular anatomy has improved over the years, the term pedicle has increasingly become reserved for describing the blood vessels that nourish the flap. (See Schwartz 11th ed., pp. 1977–1980.)
3. Phases of wound healing include all of the following EXCEPT: A. Hemostasis. B. Proliferation. C. Contraction. D. Remodeling.
Answer: C
There are different processes that characterize healing in sev­eral types of tissue, such as skin, muscle, or bone, and there is a strong underlying mechanism that is best understood in terms of a simple skin injury. The process of wound heal­ing is comprised of four integrated processes that overlap: (a) bleeding and hemostasis, (b) inflammation, (c) prolifera­tion, and (d) tissue modeling or resolution. (See Schwartz 11th ed., p. 1971.)
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4. Which of the following is TRUE about vascular anomalies? A. Hemangiomas affect 5% of premature infants. B. Oral propranolol is the treatment of choice for high-
risk infantile hemangiomas.
C. Spontaneously involving hemangiomas was result in
visible sequellae in 10% of patients.
D. Sturge-Weber syndrome present with capillary mal-
CHAPTER 45
formations involving only superficial cutaneous tissues.
Plastic and Reconstructive Surgery
Answer: B
Hemangiomas are the most common vascular tumor in chil­dren, presenting in up to 20% of premature infants. Oral propranolol therapy has emerged as the first-line treatment for complicated or high-risk infantile hemangiomas. While hemangioma involution may result in no visible sequelae, up to 50% of patients are left with a residual fibrofatty mass with antrophic, hypopigmented, and/or telangiectatic overlying skin. Sturge-Weber syndrome may be accompanied by vascu­lar malformations of the underlying leptomeninges or globe. (See Schwartz 11th ed., pp. 1996–1997.)
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Anesthesia for the Surgical Patient
1. Malignant hyperthermia (MH) can develop after receiv­ing general anesthesia. Which of the following represents a triggering agent? A. Nitrous Oxide B. Isoflurane C. Cisatracurium D. Rocuronium
2. ASA Physical Status III of the American Society of Anes­thesiologists physical status classification system denotes which of the following classes of patients? A. A normal healthy patient B. A moribund patient who is not expected to survive
without operation
C. A patient with severe systemic disease that is a con-
stant threat to life
D. A patient with severe systemic disease
Answer: B
MH is a hereditary, life-threatening, hypermetabolic acute disorder, developing during or after receiving general anes­thesia. The clinical incidence of MH is about 1:12,000 in children and 1:40,000 in adults. A genetic predisposition and one or more triggering agents are necessary to evoke MH. Tr ig­gering agents include all volatile anesthetics (eg, halothane, enflurane, isoflurane, sevoflurane, and desflurane) and the depolarizing muscle relaxant succinylcholine. Volatile anes­thetics and/or succinylcholine can cause a rise in the myoplas­mic calcium concentration in susceptible patients, resulting in persistent muscle contraction. (See Schwartz 11th ed., p. 2040.)
Answer: D
American Society of Anesthesiologists physical status classi­fication system:
P1 A normal healthy patient P2 A patient with mild systemic disease P3 A patient with severe systemic disease P4 A patient with severe systemic disease that is a constant threat to life P5 A moribund patient who is not expected to survive with­out the operation P6 A declared braindead patient whose organs are being removed for donor purposes
3. A sudden rise in end-tidal CO2 concentration from 11 to 37 mm Hg during cardiopulmonary resuscitation most likely represents which of the following? A. Adequate chest compressions B. Adequate respirations C. Return of spontaneous circulation D. Measurement artifact
(See Schwartz 11th ed., p. 2034.)
Answer: C
End tidal CO2 (etCO2) concentration monitoring during car­diopulmonary resuscitation (CPR) is becoming increasingly common. And etCO2 value of ≥10 represents adequate chest compressions. A sudden rise in etCO2 during CPR most likely represents return of spontaneous circulation. (See Schwartz 11th ed., p. 2033.)
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4. A patient presents for elective laparoscopic cholecys­tectomy. The patient reports a history of cardiac disease including a non-ST elevation MI 4 years prior that was treated with a drug-eluting stent. The patient reports being able to climb two flights of stairs. Which of the fol­lowing BEST represents workup needed prior to induc­tion of anesthesia? A. Electrocardiogram (EKG).
CHAPTER 46
Anesthesia for the Surgical Patient
B. Transthoracic echocardiography. C. Stress nuclear perfusion imaging. D. No further workup is needed.
5. A 34-year-old woman presents for elective hernia repair. According to American Society of Anesthesiologists (ASA) guidelines, after what interval from consumption of black coffee can anesthesia be induced in this patient? A. 2 hours B. 4 hours C. 6 hours D. 8 hours
6. In patients who cannot be mask ventilated or intubated via direct laryngoscopy after induction of anesthesia, which of the following represents the best next step? A. Videolaryngosocpy B. Laryngeal mask airway insertion C. Fiberoptic intubation D. Surgical airway
Answer: D
Patients who are able to perform 4 METs of exercise or more can typically proceed to surgery without additional evalua­tion. The patient presents with a history of stable coronary disease and good exercise tolerance; no further workup is needed prior to proceeding. (See Schwartz 11th ed., pp. 2034–2035.)
Answer: A
NPO guidelines for preoperative fasting safe intervals after intake of food and drink when anesthesia can be induced. The suggested interval after intake of clear liquids is 2 hours, after breast milk is 4 hours, after a light meal (small amount of easily digestible food such as toast or crackers) or infant formula is 6 hours, and after more food intake is 8 hours. In this patient, anesthesia can be induced 2 hours after intake of clear liquids. (See Schwartz 11th ed., p. 2036.)
Answer: B
The American Society of Anesthesiologists (ASA) difficult airway algorithm covers strategies to deal with difficult intu­bation and difficult mask ventilation scenarios. For patients in whom anesthesia has been induced, if initial intubation attempts are unsuccessful and face mask ventilation is inad­equate, supraglottic airway insertion should be considered. (See Schwartz 11th ed., pp. 2037–2039.)
7. According to ACC/AHA guidelines, how long after bare metal coronary stent placement should elective surgery be delayed? A. 30 days B. 3 months C. 6 months D. 1 year
8. Local anesthetic systemic toxicity can be treated by administration of which of the following? A. Sugammadex B. Neostigmine C. Flumazenil D. Lipid emulsion
Answer: A
The ACC/AHA guidelines recommend delaying elective sur­gery for 30 days after bare metal stent placement and for 1 year after drug-eluting stent placement. Dual antiplatelet therapy should be continued for urgent or emergent procedures that take place before the minimum recommended waiting period. For semi-elective surgeries in patients with drug­eluting stents, where the risk of delaying surgery is greater than the risk of in-stent thrombosis, ACC/AHA guidelines recommend surgery be delayed for 180 days. Observational data suggest that the risk of in-stent thrombosis is increased for 180 days after stent implantation, regardless of whether a bare metal stent or drug eluting stent is used. (See Schwartz 11th ed., p. 2035.)
Answer: D
In addition to treating symptomatology, local anesthetic sys­temic toxicity can be treated with intravenous administration of lipid emulsion. (See Schwartz 11th ed., p. 2031.)
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Surgical Considerations in the Elderly
1. Which of the following conditions are considered com­ponents of “geriatric syndromes”? A. Frailty B. Urinary incontinence C. Malnutrition D. All of the above
2. Criteria to define frailty include all of the following EXCEPT: A. Weight loss. B. Physical activity quantified as kcal/week. C. Grip strength. D. Orientation to time and location.
3. Risks for postoperative delirium include which of the following? A. Age > 70 years B. History of alcohol abuse C. Intraoperative blood loss D. All of the above
Answer: D
Geriatric syndromes are clinical syndromes that do not fit into discreet categories but which can negatively impact qual­ity of life, result in disability, and contribute to morbidity and mortality in elderly surgical patients. They include frailty, falls, dementia, malnutrition, and urinary incontinence, and each should be evaluated carefully preoperatively in surgical patients. (See Schwartz 11th ed., p. 2045.)
Answer: D
Unintentional weight loss of >5% from that of the previous year is considered a criterion of frailty. A standard algorithm is used to calculate physical activity and is corrected for gen­der. Men who expend <383 kcal/wk or women who expend <270 kcal/wk may be frail. Grip strength is stratified by body mass index and by gender and is also used as a criterion. Orientation to time and place may or may not indicate dementia and is not a specific criterion of frailty. (See Schwartz 11th ed., p. 2046.)
Answer: D
In addition to management of fluid and electrolyte imbalance and optimization of preoperative hematocrit and intraopera­tive blood loss, other risk factors include undertreatment of pain and a history of antecedent alcohol abuse. (See Schwartz 11th ed., p. 2047.)
4. The preoperative assessment and counseling should include which of the following? A. Confirm patient treatment goals including advance
directives
B. Confirm the patient’s health care proxy or surrogate
decision maker
C. Discuss the specific risks of the procedure and
alternative treatments based on patient’s expressed preferences
D. All of the above
Answer: D
Preoperative assessment and counseling establishes the patient’s choices and the identity of a proxy or surrogate deci­sion maker if the patient is unable to assess postoperative complications. A detailed discussion of the risks and likely resumption of full function will inform decisions regarding whether to proceed with the recommended procedure or an alternative treatment. (See Schwartz 11th ed., p. 2049.)
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5. Risks for postoperative delirium include which of the following? A. Untreated or inadequately controlled pain B. Renal insufficiency C. Dehydration D. All of the above
CHAPTER 47
6. Best practice guidelines for the assessment of nutritional status include which of the following? A. Document height, weight, and body mass index
(BMI)
B. Measure baseline serum albumin and prealbumin
levels
Surgical Considerations in the Elderly
C. Document unintentional weight loss during the
preceding year
D. All of the above
7. Factors which adversely affect the cardiac function of older adults postoperatively include which of the following? A. Depletion of intravascular volume B. Age-related impairment in the response to
catecholamines C. Increased myocardial relaxation time D. All of the above
Answer: D
The American College of Surgeons and the American Geri­atrics Society compiled a list of risk factors for postoperative delirium that include untreated or undertreated pain; sleep deprivation; renal insufficiency; anemia; dehydration; immo­bilization; and the use of psychotropic medications such as benzodiazepines, anticholinergics, and antihistamines. (See Schwartz 11th ed., p. 2050.)
Answer: D
A BMI < 18.5 kg/m2 increases the risk of complications due to nutritional impairment and may indicate a period of pre­operative nutritional support. A serum albumin of <3.0 g/dL should also prompt a referral for a detailed nutritional assess­ment. Unintentional weight loss of >5% compared to the previous year and weight loss of >10%–15% in the preceding 6 months may also be an indication for preoperative nutri­tional restoration. (See Schwartz 11th ed., p. 2051.)
Answer: D
Aging has been shown to cause a 1% decrease in cardiac out­put per year, even in the absence of arrhythmias and cardiac ischemia. The inability to increase cardiac output during stress is dependent on ventricular dilatation and volume sta­tus. Incomplete emptying of the ventricle at end systole and reduced ejection fraction leads to impaired coronary perfu­sion and ischemia. (See Schwartz 11th ed., p. 2051.)
8. Medications which should be discontinued or avoided in the elderly postoperative patient include which of the following? A. Meperidine (Demerol) B. Diphenhydramine (Benadryl) C. Antihistamines D. All of the above
9. Which forms of oral intake may be allowed up until 2 hours before general anesthesia? A. Clear liquids B. Light food and full liquids C. Fried and fatty foods D. Cooked meat
10. Prophylaxis against deep venous thrombosis has been shown to reduce the incidence of postoperative venous thromboembolism. For older adults undergoing nonor­thopedic procedures which of the following regimens is recommended? A. Full-dose heparization B. Low molecular weight heparin and lower extremity
compression devices C. Low molecular weight heparin only D. Intracaval filter placement
Answer: D
Medications with psychotropic effects such as meperidine, diphenhydramine and anticholinergics may contribute to postoperative delirium and should be avoided. (See Schwartz 11th ed., p. 2052.)
Answer: A
The American Society of Anesthesiologists issued new guide­lines in 2011 that reduced the fasting period prior to gen­eral anesthesia. Clear liquids were judged permissible until 2 hours before anesthesia, and light foods and full liquids were permissible until 6 hours before anesthesia. Fried and fatty foods and meats continue to be restricted for 8 hours before anesthesia, but other factors which can affect gastric emptying such as diabetes may require longer periods of pre­operative fasting. (See Schwartz 11 ed., p. 2053.)
Answer: B
Low molecular weight heparin (LMWH) together with lower extremity compression devices are recommended. Full-dose heparin and intracaval filter placement are accompanied by unnecessary risks and costs. (See Schwartz 11th ed., p. 2053.)
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11. Preoperative prehabilitation programs have been shown to reduce complications in elderly compromised patients. What are the components of such a prehabilita­tion program? A. An at home-based walking program with daily
follow up
B. Incentive spirometry training beginning one week
prior to surgery C. Education on stress management D. All of the above
12. What is the role of surgical palliative care? A. To avoid high-risk operations B. To minimize intervention in patients at high risk of
immanent mortality
C. To improve symptoms, reduce anxiety, and improve
quality of life
D. To support patient’s family members and caregivers
13. In frail nursing home residents, what percent of patients are alive 1 year after colon cancer resection? A. 70% B. 50% C. 30% D. 10%
Answer: D
The Michigan Surgical Home and Optimization Program has included preoperative home-based walking; incentive spi­rometry; and education about nutrition, stress management, and care planning, The program has been found to reduce postoperative complications, length of hospital stay and costs. (See Schwartz 11 ed., p. 2053.)
Answer: C
The role of surgical palliative care is to offer the treatment which will most likely improve symptoms and reduce anxi­ety. Quality of life issues are paramount, even if for limited periods of time. The purpose of surgical palliative care is to provide the best care for the patient who is compromised by age, disease, or diminished function. (See Schwartz 11th ed., p. 2053.)
Answer: B
Among frail older adults, functional decline after surgery is substantial and sustained. In one study of frail nursing home patients only 53% were alive 1 year after colon resection for malignancy. The same was true for patients who underwent lower extremity bypass. Hip replacement was associated with a 1 year mortality rate of more than one-third of patients. (See Schwartz 11 ed., p. 2054.)
CHAPTER 47
Surgical Considerations in the Elderly
14. Cancer surgery in elderly patients is: A. Always less successful. B. Complicated by the fact that clinical trials usually do
not include elderly subjects. C. Recommended equally as in younger patients. D. Does not change overall life expectancy.
15. Elderly patients with acute peritonitis may not present with typical symptoms of acute abdominal pain, fever, or leukocytosis due to an impaired immune response. A high index of suspicion is needed as the initial clinical diagnosis in elderly patients with acute appendicitis is correct in what percent of cases? A. Less than 50% B. 70%–80% C. 90%–95% D. 100%
16. In elderly patients undergoing heart valve replacement, bioprosthetic valves are preferred over synthetic valves because: A. There is less need for anticoagulation which is
hazardous in the elderly.
B. The operative time is shorter which reduces the risk
of pulmonary complications.
C. Synthetic valves have a higher incidence of manufac-
turing defects.
D. The extent of hemolysis is less with bioprosthetic valves.
Answer: B
The frequency of referrals for surgical treatment of equiva­lent stage cancer is decreased in the elderly for virtually all tumors. Despite this, survival after surgery is nearly equiva­lent for same stage malignancy as in younger patients. The data derived from clinical trials of adjuvant and neoadjuvant therapy are less helpful for decision making in elderly patients because elderly subjects are usually not included in clinical studies. (See Schwartz 11 ed., p. 2055.)
Answer: A
In elderly patients with acute appendicitis or acute cholecys­titis, one-third lack symptoms of abdominal pain, one-third are afebrile, and one-third have a normal white blood cell count. Therefore an “unimpressive” abdominal examination is irrelevant in the evaluation of the elderly patient whose tol­erance for food has suddenly changed. (See Schwartz 11th ed., p. 2055.)
Answer: A
Prolonged anticoagulation is more hazardous in the elderly where the risk of falls is increased. Even a fall from the standing position can result in a fatal intracranial bleed in an anticoagulated patient. (See Schwartz 11th ed., p. 2056.)