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360 Section 21: Biostatistics
mr
(Sy)
Sx
the X values is denoted by x, the mean of the Y values is denoted by y, the standard deviation of the X values is Sx, and the standard deviation of the Y values is Sy. The correlation between the X
and Y is denoted by r. The formula of the slope (m) of the best-fitting line is
=
where r is the correlation between x and y, and you simply divide Sy by Sx and multiply the result by r.
Correct Answer C To estimate the changes in Y for a unit change in X, this assumes that the relationship between X and Y is linear
Reference
Rumsey, D. J. (2019). Correlation and regression. In Statistics essentials for dummies (pp. 113–126).
Hoboken, NJ: Wiley.
4. RATIONALE
The null hypothesis defines the condition that the researchers need to discredit before sug­gesting an effect exists. Reject the null hypothesis when the p-value is less than or equal to your significance level. Conversely when the p-value is greater than your significance level, you fail to reject the null hypothesis. Failure to reject the null hypothesis is not the same as proving it. The null hypothesis varies by the type of statistic and hypothesis test. The t-test and ANOVA assess the difference between the group means. For these tests the null hypothesis states that there is no difference between the group means in the population. Null hypothesis Ho: Group proportions are equal in the population. Alternative hypothesis Ha: Group proportions are not equal in the population. Some studies assess the relationship between the two continuous vari­ables rather than differences between the group. Analysis often uses correlation or regression analysis. For these tests, the null states that the correlation or regression coefficient is zero. As one variable increases, there is no tendency for the other variable to increase or decrease.
Correct Answer C There are likely to be confounding variables related to marital status as well as emotional health
Reference
Neyman, J., Pearson, E. S., & Pearson, K. (1933). IX. On the problem of the most efficient tests of sta-
tistical hypotheses. Philos Trans R Soc London. Series A, Containing Papers of a Mathematical or Physical Character, 231(694–706), 289–337. doi:10.1098/rsta.1933.0009. Retrieved from h ttps://
royalsocietypublishing.org
Section 21: Biostatistics 361
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5. RATIONALE
PSM attempts to reduce the bias due to cofounding variables that could be found in an esti­mate of the treatment effect obtained from simply comparing outcomes among units that received the treatment versus those that did not. In randomized trials, the randomization enables unbiased estimation of the treatment effect. Randomization implies that treat­ment groups will be balanced on an average by the law of large numbers. Making attempts to reduce the treatment bias and mimic randomization by creating a sample of units that receives the treatment – that is, comparable on all observed covariates to a sample of units that did not receive the treatment. Analysis of contingency tables for a small sample size is often done by the Fisher exact test, and for large samples by Chi-square analysis. The Kaplan–Meier survival curve is a non-parametric statistic used to estimate the survival function from lifetime data. It is often used to measure the fraction of patients living for a certain amount of time after treatment.
Correct Answer
D Estimates the effect of the treatment policy by accounting for the covari-
ates that predict receiving the treatment
Reference
Austin, P. C. (2008). A crit ical appraisal of propensity-score matching in t he medical literatu re between
1996 and 2003. Stat Med, 27(12), 2037–2049. PMID: 18038446
6. RATIONALE
In statistical hypothesis testing, a type I error is the mistaken rejection of an actual true null hypothesis (false-positive finding), while a type II error is the failure to reject a null hypoth­esis that is actually false (false negative) – the alternative hypothesis is denoted by H1. In the aforementioned example there is a probability of 5.96% that we falsely reject Ho. If statistics are performed at a level like 0.05, then we can falsely reject Ho at 5%. Type II error is the mis­taken failure to reject the null hypothesis (false-negative test). In a clinical study you compare the symptoms of patients who received the new drug intervention to a controlled treatment. Using a t-test, you obtain a p-value of 0.035. This p-value is lower than your alpha of 0.05, so you consider your results statistically significant and reject the null hypothesis. However, the p-value means that there is 3.5% chance of your results occurring if the null hypothesis is true. Therefore, there is still a risk of making a type I error. To reduce the type I error probability, you can simply set a lower significant level.
Correct Answer A 5.96%
Reference
Bhandari, P. (2022). Type I & Type II Errors | Differences, Examples, Visualizations. Retrieved from
https://www.scribbr.com/statistics/type-i-and-type-ii-errors
362 Section 21: Biostatistics
O
Oddsinexposedgroup
Oddsinnonexposedgroup
0.205
0.01
==
P
True positives
True positivesand falsepositives7272 6
.3==
+
NP
True negatives
True negativesand falsenegatives1616 6
==
+
7. RATIONALE
A type II error means failing to conclude that there was an effect when there actually was. The study may have been underpowered. A power level of 80% or higher is usually considered accept­able. The risk of type II error is inversed related to the statistical power of a study. The higher the statistical power, the lower probability of making a type II error. By setting the type I error rate you inadvertently inf luence the size of the type II error rate. A type I error is usually worse and means going against the main statistical assumption of a null hypothesis. Based on the incorrect conclu­sion that the new drug is effective, many people may be prescribed the medication despite the risks of severe side effects, and other treatment options are rejected in favor of this intervention. In contrast with type II error, an intervention is considered ineffective when it can actually be useful.
Correct Answer C Not rejecting the null hypothesis when it is actually false
Reference
Bhandari, P. (2022). Type I & Type II Errors | Differences, Examples, Visualizations. Retrieved from
https://www.scribbr.com/statistics/type-i-and-type-ii-errors
8. RATIONALE
Odds in the exposed group are calculated first as = smokers with lung cancer/smokers without lung cancer = 17/83 = 0.205.
Next, we calculate the odds for the non-exposed group. Odds in the non-exposed group = non­smokers with lung cancer/non-smokers without lung cancer = 1/99 = 0.01.
Finally, odds ratios are calculated:
ddsratio
Thus, using the odds ratio, this hypothetical group of smokers had 20 times the odds of hav­ing lung cancer than non-smokers. The odds ratio confidence interval equals an alpha of 0.05, which means a confidence interval of 95% (1 – alpha). A 95% confidence interval is traditionally chosen in medical literature. The odds ratio should not be confused with relative risk.
Correct Answer C 20 times the odds of having lung cancer
Reference
Tenny, S., & Hoffman, M. R. (2022). Odds Ratio StatPearls. Retrieved from https://www.ncbi.nlm.nih.
gov/books/NBK431098/
9. RATIONALE
In the aforementioned problem draw the Chi-square and populate the true-positive and false­positive and true-negative and false-negative square, with data considering the gold standard test (angiogram in this example) always assumed to be the correct result.
PV
V
92
=
72.7
=
Section 21: Biostatistics 363
72
72 67278
92.3
+
16 22
True positivestruenegatives
To
72661688100
()
+
=
+++
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Correct Answer C PPV 92.3NPV 72.7
Reference
Walker, N., Bryce, J., & Black, R. E. (2007). Interpreting health statistics for policymaking: the story
behind the headlines. Lancet, 369(9565), 956–963. PMID: 17368157
10. RATIONALE
Sensitivity denotes the probability of a positive test result when the disease is present. A test must be considered sensitive in general if it is positive for most individuals having the disease.
It is calculated as two positives divided by two positives plus false negatives equals:
==
The specificity of a test determines the ability to diagnose an individual who does not have the disease as negative. A highly specificity test means that there are few false-positive results.
It is calculated as true negatives divided by true negatives plus false positives equals:
72.7=
Correct Answer C Sensitivity 92.3%Specificity 72.7%
Reference
Parikh, R., Mathai, A., Parikh, S., et al. (2008). Understanding and using sensitivity, specificity, and
predictive values. Indian J Ophthalmol, 56(1), 45–50. PMID:18158403
11. RATIONALE
The accuracy of the test is how well the test provides the correct answer, positive or negative. The accuracy of a test is determined by:
Correct Answer A 88%
Reference
Zaborowska, L. (2022). Omni Accuracy Calculator. Retrieved from https://ww w.omnicalculator.com/
talnumberoftests performedtruepositivefalse positive falsenegative true negative
72 16
+
statistics/accuracy
==
88%
++ +
Index
Note: Page numbers in italics refer to figures.
A
Abdominal aortic aneurysm (AAA), 86, 95, 97–98,
113, 122, 125, 145, 197, 217
repair, 128 Abdominal aortic coaractation, 218 Abdominal aortography, 342 Abdominal compartment syndrome (ACS), 98, 127 Abdominal/pelvic surgery, 40 Abdominal vascular trauma, 250 Aberrant right subclavian artery, 3 Abnormal resistive index, 26 Access artery injuries, 150 Access recirculation, 308 Achenbach syndrome, 355 Actinomycetoma, 298 Acute aortic occlusion, 106, 169, 187, 210 Acute arterial ischemia, 213 Acute arterial occlusion, 209, 211 Acute coronary syndrome, 38 Acute deep venous thrombosis, 258 Acute ischemia, 217, 231 Acute kidney injury (AKI), 39, 115, 212 Acute limb ischemia, 187, 209, 211–212 Acute mesenteric ischemia, 227–229, 231 Acute myocardial infarction, 106 Acute respiratory distress syndrome (ARDS), 79, 82 Acute type B aortic dissection, 104 Adductor compartment syndrome, 213 Adjuvant radiation therapy, 294 Adult filarial worms, 295 Adventitial cystic disease, 341, 345 Aggressive medical therapy, 36 Akinetic mutism, 69 Alligator retrieval device, 331 Amplatzer plug, 146 Amplatz Gooseneck Nitinol Snare, 331 Anaphyla xis, 101 Anastomosis, 74, 192, 229, 235, 241, 314, 316, 318,
322, 334, 337
Anastomotic aneurysm, 103, 109 Anastomotic disruption, 166, 205, 237, 242, 311 Andexanet alfa, 38 Anemia, 322
Aneurysmal changes, 3 Aneurysmectomy, 225 Aneurysms, 72–73, 76, 92, 96, 104, 115, 119, 159,
221–224, 238, 240, 316, 347
Angiogram, 358, 362 Angioplasty, 52, 174, 196, 205, 232, 277, 314, 320–321 Ankle-brachial index (ABI), 12–13, 17, 19, 23, 67, 188,
210, 253, 341–342, 348
Ankle pressure measurements, 17 Antecedent endovascular aneurysm repair, 99 Antegrade, 198
access, 198 Antegrade femoral access, 184, 198, 340 Antegrade femoral artery, 338 Anterior tibial artery, 1, 4–5, 188, 201 Antibiotics, 311 Antibiotic therapy, 100, 311, 334 Anticoagulants, 266 Anticoagulation, 78, 86, 247–248, 262, 265–267,
273–274, 279–280, 283, 285, 287–288, 290
Antimicrobial therapy, 310 Antiplatelet medications, 34, 36, 78, 240 Antiplatelet therapy, 78 Antithrombotic therapy, 78, 194 Aorta, 250, 284, 350 Aortic aneurysm repair, 110, 123, 249 Aortic aneurysms, 96, 116, 118, 337, 351 Aortic angle, 154 Aortic arch, 3, 50, 54, 249, 351
lesion, 43
vessels, 53, 254 Aortic bifurcation, 127, 163, 165, 197 Aortic endarterectomy, 229 Aortic endograft, 100 Aortic graft, 333
infections, 111, 142, 162 Aortic occlusive disease, 110 Aortic stent graft, 120 Aortobifemoral bypass (AFB), 105, 160–161, 165,
186, 192
graft, 106 Aortobifemoral graft, 105, 166, 208, 217, 231
reconstruction, 102 Aortobiiliac configuration, 144
Index 365
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Aortobiiliac graft, 103 Aortoduodenal fistula, 144 Aortoenteric fistula, 100, 136, 142, 152, 337 Aortofemoral bypass, 105, 174, 193
graft ing, 107
reconstruction, 105 Aortofemoral reconstruction, 105, 162, 164 Aortogram, 120, 150 Aortoiliac endarterectomy, 180 Aortoiliac occlusive disease, 105 Aortoiliac repair, 132 Aortoiliac surgery, 105 Aortoiliac vessels, 23 Aortotomy, 132, 169, 230 Apixaban, 35, 285 Aplasia, 295 Aplastic anterior tibial artery, 5 Aplastic posterior tibial artery, 5 Arc of Riolan, 139, 229 Arterial blood pressure, 1 Arterial bypass, 333, 353 Arterial calcification, 22 Arterial dissection, 217, 356 Arterial duplex test interpretation, 19 Arterial occlusive diseases, 236, 328, 334, 343 Arterial perforation, 183, 196 Arterial phase imaging, 22 Arterial pressure, 5 Arterial steal, 317 Arterial thoracic outlet syndrome, 88, 92 Arterial thromboembolism, 41, 267 Arterial venous fistula, 254, 256, 265, 279 Arterio-arterial grafts, 306, 323 Arterio-arterial interposition grafts, 323 Arteriogram, 51, 184, 188, 251 Arteriography, 9, 53, 196, 204, 216, 255, 346–347,
353, 355
Arteriolar dilatation, 26 Arterioles, 5–6 Arteriovenous fistula, 252, 256–257, 260, 265–266,
280–283, 304, 306–307, 309, 316
Arteriovenous grafts, 4, 304, 310, 313, 316 Artery aneurysms, 104 Arthroscopy, 245 Ascending aorta, 3, 52 Aspirin, 36, 241, 247, 282, 354 Asymmetric flow, 15 Asymptomatic femoral artery pseudoaneurysm, 183 Asymptomatic middle-aged women, 8, 356 Asymptomatic proximal subclavian artery, 53 Asymptomatic stenosis, 57 Asymptomatic subclavian artery stenosis, 54 Atherectomy, 338
Atherosclerosis, 75, 210, 223, 252, 347, 352, 356 Atorvastatin, 36 Atrial fibrillation, 35, 39, 80, 86, 209, 216, 227, 322 Atrial myxoma, 209 Autologous AV access site infections, 304, 311 Autologous interposition vein graft, 58 Autologous saphenous vein, 185 Autologous vein patch, 58 Autonomic nervous system renin-angiotensin
system, 5 Autoregulation, 5 Autoregulatory response, 5 AV fistula/graft, 305, 314
infection, 311 AV graft, 304–306, 309, 311, 314, 318 Axillary anastomosis, 241 Axillary artery, 4, 242, 245, 254–256, 318, 336
aneurysms, 104, 236
thrombosis, 241 Axillary intervention, 292 Axillofemoral bypass, 193
graft, 237, 241 Axillofemoral graft, 236
B
Balloon angioplasty, 37, 97, 122, 177, 205, 240, 282,
305, 314–315, 320, 351
Balloon-expandable stents, 233 Balloon-tipped Pruitt perfusion catheter, 138 Bare-metal stents, 107, 174, 320–321 Barium esophagogram, 3 Baroreceptors, 52
failure, 48, 70 Base management strategy, 96 Basilar arteries, 4, 248 Basilic vein, 245, 255–256, 316 Bedside ultrasonography (BCU), 82 Behcet’s disease, 344 Benign oligemia, 67 Benzodiazepines, 87 Best imaging technique, 13 Bifurcation, 107, 126, 351 Bilateral axillofemoral grafting, 102 Bilateral deep venous thrombosis, 261, 271 Bilateral femoral pulses, 342 Bilateral hip claudication, 13 Bilateral iliac vein thrombosis, 331 Bilateral internal carotid arteries, 35 Bilateral limb thrombosis, 161 Bilateral popliteal artery entrapment syndrome, 341 Blisters, 236, 343 Blood flow velocities, 11, 23
366 Index
Blood transfusion, 40, 196, 269 Blood velocities, 10–11, 352 Blunt carotid artery injury, 247 Blunt vertebral artery injury, 248 B-mode gray-scale imaging, 19 B-mode imaging, 12, 15 Bolus tracking, 22 Bone marrow depression, 31 Bovine aortic arch, 1 Bovine pericardial patch, 45, 58, 192 Bowel ischemia, 230 Brachial artery, 4, 55, 173, 239, 245, 254–256, 313 Brachial artery (access) thrombosis, 43 Brachial artery
aneurysms, 104, 159, 236, 239 occlusion, 240 thrombectomy, 55 variations, 1
Brachial plexus, 91–93, 239
compression, 93–94
injury, 88, 167 Brachiocephalic arteriovenous fistula, 13 Brachiocephalic artery, 1
occlusion, 43 Brachiocephalic trunk, 3 Brachiocephalic vein occlusion, 321 Brachioradial artery, 4 Bradycardia, 52, 87 Branch stent endoleaks, 98 Buddy catheter, 126–127
C
Cadaver homograft, 142 Calcification, 17–18 Calcified arteries, 203 Calcified plaque, 22 Candidiasis, 80 Caprini risk assessment score model, 265 Cardiac arrythmias, 330 Cardiac assessment, 37 Cardiac pulsations, 25 Cardiogenic pulmonary edema, 82 Cardiopulmonary bypass (CPB), 156 Cardiovascular mortality, 18 C-arm cone-beam computed tomography
(CBCT), 98 Carotid aneurysm, 49, 71–72, 74 Carotid angioplasty/stenting, 52 Carotid artery, 12, 67–68, 72
aneurysms, 76, 345 bifurcation, 48 dissection, 76, 77
Carotid artery
involvement, 345
restenosis, 64 Carotid artery, stenting, 36, 47, 60, 64, 66 Carotid basilar anastomoses, 3 Carotid bifurcation, 60, 69, 72, 76, 351 Carotid body tumors, 48, 69–70 Carotid bypass tumor, 48 Carotid clamping, 46 Carotid color duplex examination, 12 Carotid cross-clamping, 67 Carotid duplex, 14, 69
examination, 13
imaging, 12
scanning, 15 Carotid endarterectomy (CEA), 44–45, 48, 54–57,
60–67, 333
Carotid interposition grafting, 47 Carotid kinks, 49, 75 Carotid ligation, 60, 76, 246 Carotid plaque
calcification, 20
morphology, 15 Carotid pseudoaneurysm, 243, 246 Carotid revascularization, 43 Carotid Revascularization Endarterectomy versus
Stenting Trial (CREST), 62 Carotid stenosis, 12, 36 Carotid stenting (CAS), 14, 36, 42, 50, 58, 68 Carotid system, 1 Catheter-associated venous thromboembolism, 267 Catheter-based angiography, 13, 22, 158, 225, 238 Catheter-based arteriography, 29, 41, 240, 246, 314,
326, 345
Catheter-based contrast arteriography, 343 Catheter-directed thrombolysis, 122, 187, 211, 273 Catheter dysfunction, 307 Catheter malfunction, 330 Catheter-related bacteremia, 303, 310 Caudal retraction, 60 Caval perforation, 271 Caval thrombosis, 271, 273 Ceiling-mounted plexiglass, 32 Celiac artery, 14, 101, 115, 151, 216–217, 222–223
stenting angioplasty, 14 stents, 28
Celiac artery aneurysm, 222 Celiac malperfusion, 119 Cell mutations, 31 Central line–associated bloodstream infection, 257 Central venous catheters, 267, 307, 310, 320, 329 Central venous puncture, 266 Central venous stenosis/occlusion, 305
Index 367
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Cephalad-located embryological anastomosis, 3 Cephalic vein, 245, 255–256, 316
stenosis, 320 Cerebral angiogram, 358 Cerebral arterial bed, 3 Cerebral arteriogram, 358 Cerebral artery, 44, 46, 69
stenosis, 358 Cerebral autoregulation, 1 Cerebral blood flow, 5 Cerebral ischemia, 8, 56–57, 246, 356 Cerebral perfusion, 56 Cerebral vascular circulation, 21 Cerebral vasoconstriction, 5 Cerebral vasodilation, 5 Cerebral vessels, 1 Cerebrospinal f luid (CSF) drainage, 147 Cerebrovascular FMD, 8, 356 Cerebrovascular imaging, 13, 21 Cerebrovascular occlusive disease, 60 Cervical artery dissection, 49, 77–78 Cervical block anesthesia, 44 Cervical computed tomographic angiography, 246 Cervical hematomas, 62 Cervical penetrating vascular injury, 243 Cervical rib, 91, 93 Cervical second vertebral body levels, 3 Cervical vertebra, 4 Chemotherapy, 297 Chi-square analysis, 357, 361 Cholecystectomy, 221 Chronically occluded right common iliac vein
stent, 261 Chronic hand ischemia, 240 Chronic kidney disease, 17, 80, 123, 156 Chronic limb ischemia, 187, 206, 211 Chronic lymphedema, 292, 296–298 Chronic mesenteric artery ischemia, 228 Chronic mesenteric ischemia, 228–229, 231 Chronic obstructive pulmonary disease, 42, 79, 82 Chronic occlusion, 269 Chronic post-thrombotic occlusions, 268 Chronic repetitive trauma, 239 Chronic total occlusions, 184, 197 Chronic venous insufficiency, 260, 276–277, 300 Chylothorax, 76 Cilostazol, 36 Circumferential stress, 2 Claudication, 276 Clopidogrel, 36, 241, 282, 354 Clostridioides, 79 CloverSnare, 274
angiography, 38
CO
2
Coagulase-positive staphylococcus, 311 Coil embolization, 143, 146–147, 245, 255–256 Cold immersion test, 27 Colon ischemia, 95, 110 Color Doppler imaging/images, 19, 24 Color-flow imaging, 15 Common artery occlusion, 34 Common carotid artery (CCA), 50, 60, 67, 70, 74 Common carotid bifurcation, 50 Common congenital anomalies, 3 Common femoral artery, 13, 23, 150, 176, 186, 192,
195, 207, 214, 351
Common femoral endarterectomy, 207, 214 Common femoral vein, 259, 268, 277, 279 Common iliac aneurysm, 109 Common iliac artery, 100–101, 106–108, 125, 136,
164, 173, 180, 214
aneurysm, 95
stent ing, 106 Common iliac vein bifurcation, 289 Common interosseous artery, 4 Common peroneal nerve, 264 Common visceral aneurysms, 221 Compartment syndrome, 80, 187, 212–213, 240 Compensated liver cirrhosis, 101 Complex decongestive therapy, 293, 300 Complex regional pain syndrome (CRPS), 93 Complex viscosity pattern, 10 Compliance, 8, 10 Complicated carotid plaques, 15 Compression garment, 301 Compression therapy, 293, 300 Concomitant thrombolytic therapy, 269 Congenital lymphedema, 294 Congenital malformation, 22 Congenital vascular malformation, 262 Congestive heart failure, 37, 300 Conjunctive radiocephalic fistula, 92 Connective tissue disorders, 216, 356 Continuous-infusion local anesthesia, 94 Continuous-wave Doppler f low detectors, 17 Contralateral femoral access, 252 Contralateral motor paralysis, 44 Contralateral synchronous femoral aneurysm, 182 Contralateral vertebral artery, 41, 53 Contrast bolus administration, 21 Contrast-enhanced CT scans, 311 Contrast-enhanced MRA, 21, 38 Contrast-induced nephropathy prehydration, 38 Conventional carotid endarterectomy, 64 Conventional catheter-based arteriography, 29 Conventional surgical revascularization, 218 Cook Tracer Metro wire guide, 127
368 Index
Corkscrew-shaped collaterals, 353 Coronary angiography, 52 Coronary artery bypass graft, 42, 79, 106, 216 Coronary artery disease, 39, 117, 151, 156, 161,
186, 322
Coronary revascularization, 37 Coronary stenting, 244 Costoclavicular space, 90 Cranial nerve palsy, 66, 68, 74, 76 Cranial-to-caudal dissection, 71 CREST-2, 36 Critical limb ischemia, 35, 79–80, 181, 185–186,
192–193, 198, 201, 211, 325
Critical ostial stenosis, 234 Crossover femoralfemoral graft, 183 Crossover femoral-femoral graft, 183 Cryopreserved allograft, 135 Cryopreserved allograft reconstruction, 102 CT angiography (CTA), 72, 85, 97, 144, 154, 216, 242,
251–252, 256, 356
CT venography, 257, 274, 288 Curvilinear transducer, 26 Cutaneous angiosarcoma, 297 Cutaneous burns, 264 CVS, 319
stenosis, 319 Cyclooxygenase (COX), 36 Cystic disease, 346
D
Danish Vascular Registry, 110 Danish Ventral Hernia Database, 110 Debulking procedures, 293 Deep flexor compartment, 241 Deep venous thrombosis, 259, 267–268, 273,
289–290, 296, 322, 327
Defibrillator wires, 321 Degenerative arthritis, 244 Delaminar flow, 11 Delirium, 39 Desmopressin, 322 Determinative effects, 31 Dexmedetomidine infusion, 87 Diabetes mellitus, 17, 54, 79–80, 236, 310,
325–327, 353
Diabetic foot ulceration, 324 Diabetic polyneuropathy, 319 Diagnostic vascular abnormalities, 353 Dialysis access, 304 Dialysis access–associated steal syndrome, 305 Dialysis circuit, 304, 315 Diameter measurement, 24
Diffuse cerebrovascular disease, 20 Digital artery occlusion, 355 Digital compression, 206, 253 Digital pressure, 27, 317 Digital subtraction angiography (DSA), 21 Dilutional coagulopathy, 80, 127, 130 Dipyridamole, 36 Direct renal artery implantation, 235 Direct wrist access fistula, 312 Disabling claudication, 34 Diseased arterial segment, 8, 356 Distal anastomosis, 95, 99, 102, 109, 133, 135, 138,
156, 183, 185, 203–205, 208
Distal arteriotomy, 183 Distal compression, 25 Distal embolization, 177, 179, 184, 194, 197, 211, 232,
239, 347
Distal ICA occlusion, 20 Distal internal carotid artery, 47 Distal lymphatic involvement, 292 Distal perfusion pressure, 96, 117 Distal phalanx, 17 Distal Pruitt balloon occlusion catheter, 60 Distal ulnar arterial bypass, 236 Distal ureteral injuries, 164 Distal vertebral artery, 41 Distensibility, 8, 10 Doppler angle, 13, 18 Doppler artifacts, 19 Doppler digital waveform, 344 Doppler segmental pressure, 13 Doppler shift, 18 Doppler signals, 14–15 Doppler velocity, 8, 356 Double inferior vena cava (IVC), 101, 140 Double-rupture phenomenon, 222 Dual antiplatelet therapy, 37, 200, 247 Duodenal obstruction, 99, 129 Duplex surveillance, 8, 26–27, 356 Duplex ultrasound, 8, 242, 261, 281, 283, 314, 356 Dynamic arteriography, 41 Dyslipidemia, 34 Dysphagia, 3 Dysphagia lusoria, 1
E
Early carotid endarterectomy, 55, 66 Early graft limb occlusion, 122 Early graft thrombosis, 185, 203 Early postoperative hemorrhage, 105, 163 Early tracheostomy, 83 Ecchymosis, 355
Index 369
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Echogenicity, 12, 15 Echolucent, 15 Edema, 236, 292, 295, 299, 305, 313, 319, 343, 354 Effort-induced axillary-subclavian vein
thrombosis, 91 Elastin matrix, 8 Electrocautery, 93 Electromyography, 319 Elephantiasis, 298 Embolectomy, 209–211 Embolic debris, 52, 232 Embolic occlusion, 209 Embolic protection filter, 52 Embolization, 232, 238, 248, 262, 265, 285, 289,
329–330
Emergent vascular consultation, 290 Emotional health, 357 Endarterectomy, 214, 230 End-diastolic velocities, 18 Endograft, 7, 104 Endoprosthesis, 277 Endothermal heat-induced thrombosis, 257, 264 Endotracheal tube, 81 Endovascular aneurysm repair (EVAR), 32, 99–100,
131–132, 176
Endovascular conduits, 150 Endovascular forceps, 331–332 Endovascular group, 198, 214 Endovascular iliocaval procedures, 258 Endovascular interventions, 330 Endovascular repair, 35, 99, 102–103, 112, 130, 134,
184, 190–191, 201, 256
Endovascular retrieval forceps, 329 Endovascular revascularization, 187, 197, 212 Endovascular techniques, 53, 159, 169, 210–211,
222–224, 238
Endovascular therapy, 240 Endovenous ablation, 257, 291 Endovenous thermal ablation, 264 Energy expenditure, 324, 326–327 Energy requirements, 324, 327 Epilepticus, 69 Eumycetoma, 298 Eurostar Registry, 131, 133, 151 Eversion carotid endarterectomy, 45–46, 63–64 Excessive internal carotid artery tortuosity, 51 Excisional wound debridement, 164 Exercise testing, 23 External carotid artery, 19, 60, 67, 69–70 External iliac artery, 122, 127, 195, 345
aneurysms, 125 Extracavitary graft infection, 333 Extracranial carotid aneurysm, 48
F
Facial pain, 49 Fascial raphe, 335 Fasciotomy, 348
wounds, 213 Febrile illness, 43 Female-to-male ratio, 292, 294 Femoral access, 55, 339 Femoral anastomosis, 109, 183, 192 Femoral anastomotic aneurysms, 146, 182, 189 Femoral–anterior tibial bypass, 80 Femoral arteriograms, 4 Femoral artery, 53, 55, 95, 151, 251, 327, 340
access, 129, 254, 256
approach, 349
bifurcation, 169 Femoral bypass grafts, 106 Femoral infrageniculate bypass, 202 Femoral-infrapopliteal bypass, 185 Femoral-infrapopliteal in situ bypass, 333 Femoral-popliteal arteries, 184 Femoral-popliteal bypass, 185, 203 Femoral-popliteal in situ arterial bypass, 14 Femoral-popliteal-tibial, 19 Femoral-tibial bypass, 35 Femoro-femoral venous bypass, 261, 283 Femoro-ilio-caval segment, 260, 277 Fenestrated endovascular aneurysm repair
(FEVAR), 143 Fiberoptic sigmoidoscopy, 86 Fibromuscular dysplasia (FMD), 2, 8–9, 355–356 Figure-of-eight sutures, 169 Filter fracture, 258, 271 First cervical vertebra, 4 Fistula, 304 Flaccid paralysis, 46 Flexor carpi radialis, 241 Flow reversal, 14 Flow signal, 13 Fluid mechanics, 6 Fluid responsiveness, 79, 82 Fluid resuscitation, 40, 82, 176, 226 Foramen magnum, 4 Fragment embolization, 271, 330 French Buerger Network, 353 French Takayasu Network, 350 Frostbite, 236, 241, 343, 354
classification, 354 Functional entrapment syndrome, 342, 347 Functional popliteal artery entrapment syndrome,
342, 348
Fusiform aneurysms, 72