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1.
J Vasc Interv Radiol ; 12(10): 1149-55, 2001 Oct.
Article in English | MEDLINE | ID: mdl-11585880

ABSTRACT

PURPOSE: To determine how compliance with recommendations made by physicians during the 2000 Legs For Life National Screening for Peripheral Vascular Disease (PVD) and Leg Pain is affected through the use of (i) simple and concise patient information and recommendation cards and (ii) a "targeted" postscreening follow-up plan. MATERIALS AND METHODS: Patients were initially screened for PVD by completion of the Legs For Life Risk Factor Assessment form and determination of bilateral ankle/brachial indexes (ABIs). Each patient then met with an interventional radiologist or vascular surgeon. Patients with normal ABIs (>1.0 bilaterally) or mildly abnormal ABIs (<1.0 but >0.90) were classified as having no risk and low risk, respectively. Patients with ABIs of 0.70-0.89 were classified as having moderate risk for PVD and patients with ABIs <0.69 were classified as having high risk for PVD. Physicians reviewed the Risk Factor Assessment form with each patient and made specific lifestyle improvement recommendations. For the year 2000 screening, patients classified at moderate and high risk for PVD received special instructions and a card containing clearly printed information on the purpose of the Legs For Life screening, their level of risk for PVD, specific recommendations for follow-up, and phone numbers to call to help arrange for that follow-up. Two weeks after the screening, a second copy of this card was mailed to each moderate- and high-risk assessed patient. Four months later, each of these patients was contacted by telephone to determine if they had pursued additional care or testing. RESULTS: A total of 185 patients were screened, 42 (23%) of whom were determined to be at moderate or high risk for PVD. Four months after the screening, 39 (93%) of these patients were available for follow-up. Twenty (51%) patients had received no further medical advice or treatment. Nineteen (49%) patients had pursued further medical care which included physician consultation (n = 19; 100%), noninvasive Doppler evaluation (n = 10; 26%), diagnostic arteriography (n = 2; 5%), initiation of pharmacologic therapy for claudication (n = 1; 3%), percutaneous intervention (n = 1; 3%), or vascular surgery (n = 1; 3%). Seventeen of 39 patients (44%) reported that claudication-type leg pain was still a concern and/or lifestyle-limiting problem. CONCLUSION: Patients can be provided with problem-focused information and succinct physician recommendations at and soon after a screening for PVD, which can contribute to enhanced patient compliance. However, a host of personal, social, health, and physician-related issues still prevent a large percentage of patients from achieving relief of PVD-associated leg pain.


Subject(s)
Leg/blood supply , Patient Compliance , Patient Education as Topic , Peripheral Vascular Diseases/therapy , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Mass Screening , Middle Aged , Peripheral Vascular Diseases/diagnosis , Prospective Studies , Risk Factors
2.
J Vasc Interv Radiol ; 12(6): 711-5, 2001 Jun.
Article in English | MEDLINE | ID: mdl-11389222

ABSTRACT

PURPOSE: To prospectively evaluate the efficacy of a low-dose, 3-hour infusion of recombinant tissue plasminogen activator (rt-PA) for the treatment of hemodialysis catheter (HDC)-associated fibrin sheaths. This report expands the authors' experience with this technique over that previously reported. MATERIALS AND METHODS: Fifty-five patients with end-stage renal disease (38 women, 17 men) undergoing catheter-directed hemodialysis treatment were evaluated for 124 episodes of HDC dysfunction. This patient group had a mean age of 57 years and an age range of 23-92 years. Radiographic contrast studies and/or clinical evaluation were consistent with the presence of a fibrin sheath on the arterial and/or venous port in all cases. Each patient underwent a thrombolytic infusion consisting of 2.5 mg rt-PA in 50 mL normal saline at 17 mL/h (3-hour infusion) per port. All infusions were performed in the interventional radiology recovery room on an outpatient basis. Patients were followed prospectively for technical success, complications, catheter patency, and long-term outcome. RESULTS: The technical success rate, defined as return of effortless manual aspiration and infusion capability from both ports followed by at least one successful dialysis session, was 91%. No patient was excluded from rt-PA therapy because of contraindications, and the procedure-related complication rate was zero percent. A Kaplan-Meier survival analysis yielded primary patency rates at 30, 60, 90, and 120 days of 0.55, 0.36, 0.25, and 0.15 (SE <.10), respectively; secondary patency rates at 60, 120, 180, and 240 days were 0.70, 0.46, 0.30, and 0.27 (SE <.10), respectively (P < 001). At the end of the study period, all 52 surviving patients continued to undergo catheter-directed hemodialysis and 34 (65%) were using the same catheter present at the time of entrance into the study. Of the 18 patients (35%) requiring catheter exchange, 16 (89%) did for persistent malfunction after rt-PA therapy, one (5.5%) for infection, and one (5.5%) for a fractured hub. CONCLUSION: Thrombolytic therapy with use of a 2.5-mg rt-PA infusion through each port over a 3-hour period would appear to be a safe method for treating HDC-associated fibrin sheaths. Immediate return of catheter function is achieved in most patients, obviating more invasive techniques. Primary patency rates are relatively short, but catheters that fail can be retreated, resulting in secondary patency rates that are substantial and significantly improved.


Subject(s)
Catheterization, Central Venous/adverse effects , Kidney Failure, Chronic/drug therapy , Plasminogen Activators/therapeutic use , Renal Dialysis , Thrombolytic Therapy , Tissue Plasminogen Activator/therapeutic use , Adult , Aged , Aged, 80 and over , Female , Follow-Up Studies , Humans , Kidney Failure, Chronic/mortality , Kidney Failure, Chronic/therapy , Male , Middle Aged , Prospective Studies , Survival Analysis
3.
J Vasc Interv Radiol ; 12(1): 33-7, 2001 Jan.
Article in English | MEDLINE | ID: mdl-11200351

ABSTRACT

PURPOSE: To determine compliance within a community with recommendations made by physicians during the 1999 Legs for Life National Screening for Peripheral Vascular Disease (PVD) and Leg Pain. MATERIALS AND METHODS: Patients were initially screened for PVD by completion of the Legs for Life risk factor questionnaire and determination of bilateral ankle/brachial indexes (ABIs). Each patient subsequently met with an interventional radiologist or vascular surgeon. Patients with normal ABIs (>1.0 bilaterally) or mildly abnormal ABI(s) (<1.0 but >0.90) were classified at no and low risk for PVD, respectively; patients with ABI(s) of 0.70-0.89 were classified at moderate risk for PVD; and patients with ABI(s) <0.69 were classified at high risk for PVD. Risk factors for PVD were assessed by the consulting physician and discussed with all patients. Recommendations were made for additional evaluation and/or follow-up care, if necessary. Seven months after screening, patients who were assessed at moderate and high risk for PVD were contacted by telephone to determine if they had pursued additional care or testing. RESULTS: A total of 205 patients were screened for PVD, 48 (23%) of whom were determined to be at moderate to high risk. Forty-four (92%) patients were available for follow-up. At 7 months after screening, 31 (70%) patients had received no further medical advice or treatment. Thirteen (30%) of these patients had completed a follow-up appointment, but only three with a physician specializing in peripheral vascular disease. None of the patients had clinical follow-up with an interventional radiologist. Five (11%) patients had undergone noninvasive Doppler evaluation and one (2%) had undergone diagnostic arteriography. No patient had undergone any form of percutaneous or surgical intervention. CONCLUSION: Patient compliance with physician recommendations after outpatient screening for PVD is low. The Legs for Life screening program could be considered successful in that it provides for patient education and the identification of moderate to high-risk patients. Physicians participating in this program may have to modify their approach to patient screening and follow-up if a concomitant goal is to deliver specialty care.


Subject(s)
Leg/blood supply , Patient Compliance , Peripheral Vascular Diseases/therapy , Adult , Aged , Aged, 80 and over , Female , Follow-Up Studies , Humans , Male , Middle Aged , Patient Education as Topic
4.
J Vasc Interv Radiol ; 11(9): 1131-6, 2000 Oct.
Article in English | MEDLINE | ID: mdl-11041468

ABSTRACT

PURPOSE: To prospectively evaluate the efficacy of a low-dose, 3-hour recombinant tissue plasminogen activator (rt-PA) infusion for the treatment of hemodialysis catheter (HDC)-associated fibrin sheaths. MATERIALS AND METHODS: Seventeen patients with end-stage renal disease (female, n = 11; male, n = 6), who were undergoing catheter-directed hemodialysis, were evaluated for 28 episodes of HDC dysfunction. This patient group ranged in age from 25 to 92 years (mean, 57 years). Radiographic contrast and/or clinical evaluation were consistent with the presence of a fibrin sheath on either the arterial and/or venous port in all cases. Patients subsequently underwent a thrombolytic infusion consisting of 2.5 mg rt-PA in 50 mL normal saline at a rate of 17 mL/h (3-hour infusion) per port. All infusions were performed in the interventional radiology recovery room, on an outpatient basis. Patients were followed-up prospectively for technical success, complications, catheter patency, and long-term outcome. RESULTS: The immediate technical success rate, defined as return of manual aspiration and infusion capabilities to both ports, was 100%. No potential patients required exclusion from thrombolytic therapy secondary to contraindications, and no procedure-related complications occurred. The arithmetic mean and median catheter patency at the end of the study was 41 and 25 days, respectively (range, 1-116 days). A Kaplan-Meier survival analysis yielded a 30-, 60-, and 90-day probability of patency of 0.67, 0.61, and 0.51, respectively. At the end of the study period, all 17 patients remained on catheter-directed hemodialysis and 13 (76%) were utilizing the same catheter present at the time of entrance into the study. CONCLUSION: Thrombolytic therapy utilizing a 2.5-mg rt-PA infusion through each port during a 3-hour period would appear to be a safe, efficient method for treating HDC-associated fibrin sheaths. Three-month patency rates are comparable to those reported for other methods of restoring function to HDC catheters, including new catheter placement, catheter exchange over a guide wire, thrombolytic infusions with urokinase, and percutaneous fibrin sheath stripping.


Subject(s)
Catheterization, Central Venous , Catheters, Indwelling , Fibrin , Fibrinolytic Agents/administration & dosage , Renal Dialysis/instrumentation , Tissue Plasminogen Activator/administration & dosage , Adult , Aged , Aged, 80 and over , Equipment Failure , Female , Humans , Kidney Failure, Chronic/therapy , Male , Middle Aged , Prospective Studies , Radiography, Interventional , Survival Analysis , Treatment Outcome , Vascular Patency
5.
Radiology ; 206(2): 403-14, 1998 Feb.
Article in English | MEDLINE | ID: mdl-9457193

ABSTRACT

PURPOSE: To evaluate a percutaneous thrombolytic device (PTD) designed for treating thrombosed hemodialysis access grafts. MATERIALS AND METHODS: To compare the PTD with pulse-spray pharmacomechanical thrombolysis (PSPMT) by using urokinase, 122 randomly chosen patients with synthetic, thrombosed hemodialysis access grafts from multiple centers prospectively underwent thrombolysis with the PTD (5-F, low-speed rotational mechanical device) or PSPMT. Major outcome variables included the procedure time, the immediate technical patency rate, the complication rate, and the 3-month patency rate. RESULTS: Sixty-four PTD and 58 PSPMT procedures were performed with intent to treat. The immediate technical patency rate was 95% (61 of 64 [PTD] and 55 of 58 [PSPMT]) in both procedures. Median procedure times were 75 minutes in the PTD group (range, 25-209 minutes) and 85 minutes in the PSPMT group (range, 50-273 minutes; P < .04). Major complications occurred in 8% (five of 64) of PTD procedures (none related to the PTD) and 9% (five of 58) PSPMT procedures (not significant). Two devices broke (one during training) with no clinical sequela. The 3-month primary patency rate was 39% (25 of 64) in the PTD group and 40% (23 of 58) in the PSPMT group (not significant). CONCLUSION: The PTD is safe and effective for treating thrombosed hemodialysis access grafts. The technical and long-term success rates are similar to those of PSPMT; procedure times are shorter.


Subject(s)
Graft Occlusion, Vascular/therapy , Plasminogen Activators/administration & dosage , Renal Dialysis , Thrombectomy/instrumentation , Thrombolytic Therapy/methods , Thrombosis/therapy , Urokinase-Type Plasminogen Activator/administration & dosage , Conscious Sedation , Equipment Design , Female , Follow-Up Studies , Humans , Male , Middle Aged , Plasminogen Activators/adverse effects , Plasminogen Activators/therapeutic use , Proportional Hazards Models , Prospective Studies , Thrombectomy/adverse effects , Thrombolytic Therapy/adverse effects , Time Factors , Urokinase-Type Plasminogen Activator/adverse effects , Urokinase-Type Plasminogen Activator/therapeutic use , Vascular Patency
6.
ASAIO J ; 41(4): 842-6, 1995.
Article in English | MEDLINE | ID: mdl-8589464

ABSTRACT

The maintenance of adequate hemodialysis vascular access is frequently complicated in the patient with polytetrafluoroethylene (PTFE) A-V hemodialysis grafts by venous anastomotic stenosis. This stenosis is caused by neointimal hyperplasia (NIH), a response to vascular injury. In this study, the authors prospectively analyzed the effect of a short-term regimen consisting of administration of two medications, heparin and low molecular weight dextran, on the development of NIH at the venous anastomosis in 79 patients with PTFE A-V hemodialysis grafts. In addition, they evaluated other parameters' effects on the development of NIH. In comparison with control subjects, heparin had some effect in minimizing the development of NIH in the PTFE grafts when evaluated radiologically at 3 months, although this effect was not statistically significant. Low molecular weight dextran, however, had no trend or statistically significant effect on this venous anastomotic narrowing. Interestingly, patient age, use of calcium channel blockers, and presence of diabetes mellitus (DM) all appeared to affect the development of NIH. Increasing age and use of calcium channel blockers was associated with decreased development of NIH; conversely, DM was associated with worsened NIH. In evaluation of access survival (time to first access failure), degree of venous anastomosis stenosis at 3 months was not predictive. Patient time on dialysis pre graft placement was the only measured parameter related to access failure. The method of dialysis pre graft placement (hemodialysis versus peritoneal dialysis) was not a significant factor in early access failure. Pharmacologic treatment of venous anastomotic narrowing in PTFE hemodialysis grafts due to NIH continues to be difficult. Short-term treatment with the tested medication failed to statistically affect NIH. Patient age, use of calcium channel blockers, and presence of DM were all factors in the development of NIH. Of measured parameters, time on dialysis pre graft placement was the only factor correlated with early access failure. In future treatment regimens, one should consider more prolonged treatment. In addition, noted risk factors should be considered when determining type of renal replacement therapy.


Subject(s)
Anticoagulants/therapeutic use , Arteriovenous Anastomosis/physiopathology , Catheters, Indwelling/standards , Endothelium, Vascular/pathology , Fibrinolytic Agents/therapeutic use , Renal Dialysis/standards , Adult , Aged , Aging/metabolism , Analysis of Variance , Anticoagulants/administration & dosage , Anticoagulants/pharmacology , Calcium Channel Blockers/pharmacology , Catheters, Indwelling/adverse effects , Constriction, Pathologic/etiology , Constriction, Pathologic/physiopathology , Constriction, Pathologic/prevention & control , Dextrans/administration & dosage , Dextrans/pharmacology , Dextrans/therapeutic use , Diabetes Mellitus/physiopathology , Endothelium, Vascular/drug effects , Endothelium, Vascular/injuries , Female , Fibrinolytic Agents/administration & dosage , Fibrinolytic Agents/pharmacology , Heparin/administration & dosage , Heparin/pharmacology , Heparin/therapeutic use , Humans , Hyperplasia/complications , Hyperplasia/physiopathology , Hyperplasia/prevention & control , Kidney Transplantation , Linear Models , Male , Middle Aged , Molecular Weight , Polytetrafluoroethylene/adverse effects , Renal Dialysis/adverse effects , Risk Factors , Treatment Outcome
7.
J Vasc Interv Radiol ; 5(5): 771-5, 1994.
Article in English | MEDLINE | ID: mdl-8000128

ABSTRACT

PURPOSE: Imaging of dialysis fistulas was performed with use of carbon dioxide and iodinated contrast material. Images were then compared to assess the quality and accuracy of CO2 as a contrast agent. PATIENTS AND METHODS: Thirty-two patients underwent digital subtraction imaging of the fistulas performed with both iodinated contrast material and CO2 to evaluate the venous anastomosis. The images were blinded and the degree of stenosis was graded in 10% increments by two physicians. Statistical analysis including sensitivity, specificity, and accuracy of CO2 images was performed. RESULTS: There was no significant difference in physician ratings of the degree of venous stenosis (P > .30). Estimation of the degree of stenosis was significantly higher with CO2 than with ionic contrast material (P = .0001). When iodinated contrast material is used as the gold standard, the sensitivity, specificity, and accuracy of CO2 were 94%, 58%, and 75%, respectively. CONCLUSIONS: CO2 has a role as a contrast agent in the imaging of dialysis access grafts when the use of iodinated contrast material is of concern. CO2 is safe for venous injections; however, it should not be used to evaluate the arterial anastomosis with the "reflux technique."


Subject(s)
Angiography, Digital Subtraction/methods , Arteriovenous Shunt, Surgical , Blood Vessel Prosthesis , Carbon Dioxide , Graft Occlusion, Vascular/diagnostic imaging , Iopamidol , Polytetrafluoroethylene , Renal Dialysis , Evaluation Studies as Topic , Female , Humans , Male , Middle Aged , Sensitivity and Specificity
10.
Radiology ; 181(2): 507-14, 1991 Nov.
Article in English | MEDLINE | ID: mdl-1924796

ABSTRACT

Palmaz balloon-expandable stents were placed in 28 hypertensive patients with atherosclerosis involving the ostia of the renal arteries. Stents were placed to treat elastic recoil immediately after conventional angioplasty in 20 patients and restenosis after percutaneous transluminal angioplasty in eight patients. Technical success (greater than 30% residual stenosis) was achieved in 27 patients. Complications occurred in five patients. At follow-up (1-25 months), hypertension was cured in three patients and improved in 15 patients, with a cumulative cure or improvement of 64% at 6 months. Of 14 patients with a serum creatinine level of 1.5 mg/dL (132.6 mumol/L) or greater before the placement of stents, five demonstrated improved renal function, five showed stabilization of their condition, and four demonstrated deterioration. Follow-up angiography (2-18 months) was performed in 18 patients. Restenosis was present in seven patients and was accompanied by a relapse of hypertension in only three patients. Of the other four patients with restenosis, two had no initial improvement and two had an initial response without a relapse of hypertension. In this preliminary study, renal stents were beneficial in many patients with poor results from conventional angioplasty for ostial atheroma.


Subject(s)
Arteriosclerosis/surgery , Renal Artery Obstruction/surgery , Renal Artery , Stents , Aged , Aged, 80 and over , Blood Pressure , Female , Follow-Up Studies , Humans , Kidney/physiopathology , Male , Middle Aged , Radiography , Recurrence , Renal Artery/diagnostic imaging , Renal Artery Obstruction/diagnostic imaging , Renal Artery Obstruction/physiopathology
11.
J Vasc Interv Radiol ; 2(2): 215-23, 1991 May.
Article in English | MEDLINE | ID: mdl-1839235

ABSTRACT

Palmaz balloon-expandable intraluminal stents (BEISs) were used to treat vena caval and adjacent central venous obstructions that failed to respond to conventional balloon angioplasty. An initial series included seven patients: five had superior vena cava (SVC) syndrome due to a malignant neoplasm and/or radiation therapy, one had dialysis access-related stenosis of the subclavian vein, and one had inferior vena cava (IVC) and bilateral common iliac vein obstruction due to abdominopelvic radiation therapy for Hodgkin disease. Treatment produced clinical benefit in all seven patients. Patency was achieved with stents placed across stenoses of the SVC, IVC, and brachiocephalic and subclavian veins. One stent placed in a left common iliac vein was oval and was shown to be occluded on a follow-up computed tomographic scan, suggesting that compression between the right common iliac artery and the spine was responsible. Although caution is recommended in placement at possible compression sites, BEISs can be used to treat obstructions of the vena cava and major central veins.


Subject(s)
Angioplasty, Balloon , Stents , Superior Vena Cava Syndrome/therapy , Vascular Diseases/therapy , Venae Cavae , Adult , Aged , Constriction, Pathologic/therapy , Equipment Design , Female , Humans , Iliac Vein , Male , Middle Aged , Subclavian Vein
12.
Ann Vasc Surg ; 5(2): 150-5, 1991 Mar.
Article in English | MEDLINE | ID: mdl-1826607

ABSTRACT

Since 1987, we have used the Palmaz expandable intraluminal stent in 22 selected cases of iliac artery stenosis in 14 men and six women with a mean age of 63 years for claudication (9), graft salvage (5), rest pain (4), and tissue loss (2). Morphologic criteria included severe percutaneous balloon angioplasty-induced dissection (6), long or multiple stenoses or occlusions (5), post-percutaneous balloon angioplasty elastic recoil (4), location of stenosis (4), and restenosis following percutaneous balloon angioplasty (3). Twenty-two limbs were treated with 61 stents. The mean pressure gradient across the lesion fell from 31 +/- 15 to 1.1 +/- 2.4 mmHg after stenting. The mean ankle/brachial systolic pressure index improved from 0.59 +/- 0.31 to 0.83 +/- 0.25 after stenting. The mean follow-up is 11.4 months, with a mean ankle/brachial index at their most recent follow-up of 0.88 +/- 0.19. Symptomatically, 11 extremities are normal and five limbs are improved. Three patients have died and two have required bypass grafts for iliac occlusive disease. In this early experience, the Palmaz intraluminal stent appears to be valuable for the management of post-percutaneous balloon angioplasty restenosis, elastic recoil, and percutaneous balloon angioplasty-induced dissection, although it is not without complications.


Subject(s)
Angioplasty, Balloon , Arterial Occlusive Diseases/therapy , Iliac Artery , Stents , Constriction, Pathologic/therapy , Equipment Design , Evaluation Studies as Topic , Female , Humans , Male , Middle Aged , Recurrence
13.
Radiology ; 176(1): 31-8, 1990 Jul.
Article in English | MEDLINE | ID: mdl-2141175

ABSTRACT

Intravascular stent placement may be an effective treatment for percutaneous transluminal angioplasty (PTA)-induced dissection. Among the first 228 patients treated with Palmaz balloon-expandable intraluminal stents (BEISs) for iliac artery stenosis, stents were used to treat PTA-induced dissection in at least 12 iliac arteries in 11 patients. All 12 vessels were shown by angiography to be severely dissected. Stents were placed at the time of PTA in six vessels and as a separate procedure in the other six. An average of three stents per vessel were employed. All arteries showed marked improvement at angiography. Angiographic follow-up was obtained for eight vessels in seven patients at a mean follow-up time of 12.9 months. All had patent stent lumens with neointima formation, although one stented lumen had narrowed, and another clinical failure occurred despite a patent stented vessel and an ankle-arm index (AAI) of 1.35. With a mean clinical follow-up of 9.5 months, the mean AAI for the stented extremities in the nine remaining patients is 0.91 +/- 0.15. Palmaz BEISs are effective in the management of PTA-induced human iliac artery dissection.


Subject(s)
Angioplasty, Balloon/adverse effects , Iliac Artery/injuries , Stents , Adult , Aged , Female , Humans , Iliac Artery/diagnostic imaging , Iliac Artery/surgery , Intermittent Claudication/diagnostic imaging , Intermittent Claudication/therapy , Male , Middle Aged , Radiography
15.
J Comput Assist Tomogr ; 11(4): 714-6, 1987.
Article in English | MEDLINE | ID: mdl-3298339

ABSTRACT

Lymphoceles are common complications of renal transplantation and usually arise between the bladder and the transplant kidney. A rare case of a parapelvic lymphocyst in a renal allograft is presented that sonographically mimicked hydronephrosis but was correctly diagnosed by CT.


Subject(s)
Hydronephrosis/diagnostic imaging , Kidney Diseases, Cystic/diagnostic imaging , Kidney Transplantation , Lymphatic Diseases/diagnostic imaging , Tomography, X-Ray Computed , Adult , Diagnosis, Differential , Humans , Male
16.
Adm Radiol ; 6(1): 31-6, 1987 Jan.
Article in English | MEDLINE | ID: mdl-10281202

ABSTRACT

There is solid scientific data justifying the routine screening of women as proposed by the ACR and ACS. The review of the financial proforma of dedicated breast imaging clinic indicates routine screening can be accomplished at an affordable price to the patient and provide a reasonable profit for the radiologist. Dedicated mammography equipment, quality imaging, and professional interpretations should produce a profitable operation in both mobile and fixed instillations if one has an adequate market and works successfully at marketing the clinic.


Subject(s)
Ambulatory Care Facilities/organization & administration , Breast Neoplasms/diagnosis , Mammography/economics , Mobile Health Units/organization & administration , Adult , Aged , Female , Humans , Income , Middle Aged , United States
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