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  1. Article ; Online: Evaluation of volumetric measurements in patients with acute type B aortic dissection--thoracic endovascular aortic repair (TEVAR) vs conservative.

    Chemelli-Steingruber, Iris Eva / Chemelli, Andreas / Strasak, Alexander / Hugl, Beate / Hiemetzberger, Renate / Czermak, Benedikt V

    Journal of vascular surgery

    2009  Volume 49, Issue 1, Page(s) 20–28

    Abstract: Objective: The aim of this retrospective study was to evaluate aortic volume changes in patients with acute type B aortic dissection (TBD), treated either by thoracic endovascular aortic repair (TEVAR) or conservatively.: Materials and methods: From ... ...

    Abstract Objective: The aim of this retrospective study was to evaluate aortic volume changes in patients with acute type B aortic dissection (TBD), treated either by thoracic endovascular aortic repair (TEVAR) or conservatively.
    Materials and methods: From July 1996 through March 2008, 76 patients presenting with acute TBD were referred to our department. To ensure a follow-up of at least 24 months, only 64 of them were included in the present study, with the cut-off for inclusion being March 2006. Twenty-nine of these patients underwent TEVAR and 35 patients underwent conservative treatment. Indications for TEVAR were life-threatening symptoms. Follow-up was performed postinterventionally in patients after TEVAR and at 3, 6, and 12 months, and yearly thereafter in both groups. It included clinical examinations, computed tomography (CT) scans, analysis of volume changes in true thoracic lumen (TTL), false thoracic lumen (FTL), thoracic lumen (TL), abdominal lumen (AL), and aortic diameter measurements. In addition, the extent of thrombosis and its influence on volume changes were assessed.
    Results: Mean follow-up was 41 months after TEVAR and 46 months in the conservatively-treated patients. At 60 months, cumulative rates of freedom from dissection-related death and rupture-free survival were 82.6% and 93.1% in the TEVAR group, respectively. They were 74.9% and 88.5% in the conservatively-treated group, respectively. In the conservatively-treated patients, 3 patients died of late aortic rupture, 4 were converted to open surgery, and 2 to TEVAR. Evaluation of volume changes showed better results in the TEVAR group within 24 months. However, within 60 months the difference between the two groups was no longer relevant. Relating to thrombosis of the FTL, analyses showed slightly better overall results and promotion of thrombus formation after TEVAR. However, at 60 months the results showed a tendency towards approximation between the two groups.
    Conclusion: Our data suggest that TEVAR seems to delay the natural course of the disease but not to stop it.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Aneurysm, Dissecting/complications ; Aneurysm, Dissecting/diagnostic imaging ; Aneurysm, Dissecting/mortality ; Aneurysm, Dissecting/surgery ; Angiography, Digital Subtraction ; Aorta, Thoracic/diagnostic imaging ; Aorta, Thoracic/surgery ; Aortic Aneurysm, Thoracic/complications ; Aortic Aneurysm, Thoracic/diagnostic imaging ; Aortic Aneurysm, Thoracic/mortality ; Aortic Aneurysm, Thoracic/surgery ; Aortic Rupture/diagnostic imaging ; Aortic Rupture/etiology ; Aortic Rupture/surgery ; Aortography/methods ; Blood Vessel Prosthesis Implantation ; Dilatation, Pathologic ; Disease Progression ; Female ; Humans ; Male ; Middle Aged ; Radiographic Image Interpretation, Computer-Assisted ; Retrospective Studies ; Thrombosis/diagnostic imaging ; Thrombosis/etiology ; Thrombosis/surgery ; Time Factors ; Tomography, Spiral Computed ; Treatment Outcome
    Language English
    Publishing date 2009-01
    Publishing country United States
    Document type Comparative Study ; Journal Article
    ZDB-ID 605700-7
    ISSN 1097-6809 ; 0741-5214
    ISSN (online) 1097-6809
    ISSN 0741-5214
    DOI 10.1016/j.jvs.2008.08.062
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Endovascular repair of isolated iliac artery aneurysms.

    Chemelli, Andreas / Hugl, Beate / Klocker, Josef / Thauerer, Michael / Strasak, Alexander / Jaschke, Werner / Waldenberger, Peter / Chemelli-Steingruber, Iris Eva

    Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists

    2010  Volume 17, Issue 4, Page(s) 492–503

    Abstract: Purpose: To retrospectively evaluate a 12-year experience with endovascular repair of isolated iliac artery aneurysm (IAA).: Methods: From August 1997 through July 2009, 91 patients (81 men; mean age 71 years, range 31-90) underwent endovascular ... ...

    Abstract Purpose: To retrospectively evaluate a 12-year experience with endovascular repair of isolated iliac artery aneurysm (IAA).
    Methods: From August 1997 through July 2009, 91 patients (81 men; mean age 71 years, range 31-90) underwent endovascular treatment for isolated IAA at our department. Of these, 77 patients received stent-grafts either alone or in combination with coils or an Amplatzer vascular plug (n = 2); 1 patient received a Smart stent combined with coils, and 13 patients were treated with coil embolization only. The aneurysms were classified according to location: type I = common iliac artery (CIA), type II = internal iliac artery (IIA), type III = CIA and IIA, and type IV = external iliac artery with/without CIA and/or IIA involvement.
    Results: Primary technical success was 90.1% for all aneurysm types and 93.6%, 80%, 88.8%, and 93.3% for types I, II, III, and IV, respectively. Secondary technical success was 96.7% for all types and 97.8%, 95%, 100%, and 93.3%, respectively, for each type. Clinical success was 93.4% for all types and 97.8%, 85%, 100%, and 86.7%, respectively, by type. Complications in 18 (19.8%) patients included 7 type I endoleaks, 3 type II endoleaks, 2 enlarged aneurysm sacs (incomplete embolization), 5 cases of buttock claudication, and 2 stent-graft thromboses. Two patients were converted to open surgery; 10 underwent secondary interventions. Mortality rates were 1.1% (n = 1) at 30 death days and 23.1% (n = 21) over a mean follow-up of 45.9 months (no aneurysm-related death). Cumulative overall survival was 97.7% at 1 year and 47.6% at 10 years. Freedom from aneurysm-related complications was 88.6% at 1 year and 83.5% at 5 years.
    Conclusion: Endovascular repair of isolated IAA is a safe and minimally invasive alternative to surgery. However, it may be associated with several complications and must, therefore, be carefully planned.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Austria ; Blood Vessel Prosthesis ; Blood Vessel Prosthesis Implantation/adverse effects ; Blood Vessel Prosthesis Implantation/instrumentation ; Blood Vessel Prosthesis Implantation/mortality ; Embolization, Therapeutic/adverse effects ; Embolization, Therapeutic/instrumentation ; Embolization, Therapeutic/mortality ; Female ; Humans ; Iliac Aneurysm/diagnostic imaging ; Iliac Aneurysm/mortality ; Iliac Aneurysm/surgery ; Iliac Aneurysm/therapy ; Kaplan-Meier Estimate ; Male ; Middle Aged ; Patient Selection ; Retrospective Studies ; Risk Assessment ; Stents ; Survival Rate ; Time Factors ; Tomography, X-Ray Computed ; Treatment Outcome
    Language English
    Publishing date 2010-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2006618-1
    ISSN 1545-1550 ; 1526-6028
    ISSN (online) 1545-1550
    ISSN 1526-6028
    DOI 10.1583/10-3047.1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Endovascular repair of acute type B aortic dissection: midterm results.

    Steingruber, Iris Eva / Chemelli, Andreas / Glodny, Bernhard / Hugl, Beate / Bonatti, Johannes / Hiemetzbeger, Renate / Jaschke, Werner / Czermak, Benedikt Viktor

    Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists

    2008  Volume 15, Issue 2, Page(s) 150–160

    Abstract: Purpose: To evaluate midterm results of endovascular stent-graft placement for acute Stanford type B dissection (TBD).: Methods: A retrospective review was conducted of 35 consecutive patients who were treated with stent-graft implantation for acute ... ...

    Abstract Purpose: To evaluate midterm results of endovascular stent-graft placement for acute Stanford type B dissection (TBD).
    Methods: A retrospective review was conducted of 35 consecutive patients who were treated with stent-graft implantation for acute TBD between July 1996 and July 2007. Computed tomographic (CT) volumetric analysis of the true lumen (TL) and false lumen (FL) changes in 23 patients was performed, as well as evaluation of the influence of re-entry points and length of stent-graft coverage on volume changes. In addition, complications were evaluated. Follow-up was performed at 6 and 12 months and yearly thereafter.
    Results: The technical success rate was 82.7%, and the 30-day mortality rate was 8.5%. Mean follow-up was 34 months. The overall survival rate at 5 years was 78.4%. Complications included retrograde type A dissections in 3 patients during the perioperative period and in 1 patient during midterm follow-up. In addition, 5 early and 3 late endoleaks were observed. Three patients were converted to open surgery and 2 needed secondary interventions. In the stented segment, stabilization of the aorta was achieved even during midterm follow-up, with a TL volume increase of 59% at 5 years and nearly stable FL volume. The segment from the distal end of the stent-graft to the celiac artery, however, showed unstable TL and FL volumes, with high standard deviations after the first postinterventional year and circumferential aneurysmal dilatation of the aorta immediately adjacent to the stent-graft in 5 patients. The abdominal aorta showed no substantial volume changes over time. The length of stent-graft coverage and the occurrence of re-entries greatly influenced FL volume changes distal to the stent-graft.
    Conclusion: Serious complications can occur during and after endovascular repair of TBD. Therefore, it should be reserved for high-risk patients.
    MeSH term(s) Acute Disease ; Adult ; Aged ; Aged, 80 and over ; Aneurysm, Dissecting/diagnostic imaging ; Aneurysm, Dissecting/surgery ; Aortic Aneurysm, Thoracic/diagnostic imaging ; Aortic Aneurysm, Thoracic/surgery ; Blood Vessel Prosthesis Implantation ; Contrast Media ; Female ; Humans ; Iohexol/analogs & derivatives ; Logistic Models ; Male ; Middle Aged ; Postoperative Complications ; Retrospective Studies ; Statistics, Nonparametric ; Stents ; Survival Rate ; Tomography, X-Ray Computed ; Treatment Outcome
    Chemical Substances Contrast Media ; Iohexol (4419T9MX03) ; iopromide (712BAC33MZ)
    Language English
    Publishing date 2008-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2006618-1
    ISSN 1545-1550 ; 1526-6028
    ISSN (online) 1545-1550
    ISSN 1526-6028
    DOI 10.1583/07-2288.1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Resolution requirements for monitor viewing of digital flat-panel detector radiographs: a contrast detail analysis.

    Peer, Siegfried / Giacomuzzi, Salvatore M / Peer, Regina / Gassner, Eva / Steingruber, Iris / Jaschke, Werner

    European radiology

    2002  Volume 13, Issue 2, Page(s) 413–417

    Abstract: With the introduction of digital flat-panel detector systems into clinical practice, the still unresolved question of resolution requirements for picture archiving communication system (PACS) workstation monitors has gained new momentum. This contrast ... ...

    Abstract With the introduction of digital flat-panel detector systems into clinical practice, the still unresolved question of resolution requirements for picture archiving communication system (PACS) workstation monitors has gained new momentum. This contrast detail analysis was thus performed to define the differences in observer performance in the detection of small low-contrast objects on clinical 1K and 2K monitor workstations. Images of the CDRAD 2.0 phantom were acquired at varying exposures on an indirect-type digital flat-panel detector. Three observers evaluated a total of 15 images each with respect to the threshold contrast for each detail size. The numbers of correctly identified objects were determined for all image subsets. No significant difference in the correct detection ratio was detected among the observers; however, the difference between the two types of workstations (1K vs 2K monitors) despite less than 3% was significant at a 95% confidence level. Slight but statistically significant differences exist in the detection of low-contrast nodular details visualized on 1K- and 2K-monitor workstations. Further work is needed to see if this result holds true also for comparison of clinical flat-panel detector images and may, for example, exert an influence on the diagnostic accuracy of chest X-ray readings.
    MeSH term(s) Computer Terminals ; Data Display ; Humans ; Image Enhancement/instrumentation ; Observer Variation ; Phantoms, Imaging ; Radiology Information Systems/instrumentation ; Sensitivity and Specificity
    Language English
    Publishing date 2002-06-14
    Publishing country Germany
    Document type Comparative Study ; Evaluation Study ; Journal Article
    ZDB-ID 1085366-2
    ISSN 1432-1084 ; 0938-7994 ; 1613-3749
    ISSN (online) 1432-1084
    ISSN 0938-7994 ; 1613-3749
    DOI 10.1007/s00330-002-1479-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Intrapelvic complications after total hip arthroplasty failure.

    Bach, Christian Michael / Steingruber, Iris Eva / Ogon, Michael / Maurer, Herbert / Nogler, Michael / Wimmer, Cornelius

    American journal of surgery

    2001  Volume 183, Issue 1, Page(s) 75–79

    Abstract: Background: Severe total hip arthroplasty failure with central migration of prosthetic components is uncommon. If perforation of the medial acetabular wall occurs, injuries of intrapelvic structures may result.: Data sources: A meta-analysis of the ... ...

    Abstract Background: Severe total hip arthroplasty failure with central migration of prosthetic components is uncommon. If perforation of the medial acetabular wall occurs, injuries of intrapelvic structures may result.
    Data sources: A meta-analysis of the English literature was performed. A human pelvic cadaver was used to demonstrate the proximity of intrapelvic structures to a centrally dislocated cup.
    Results: Fifty cases of intrapelvic injury were identified. Structures involved most frequently were the external iliac artery and the bladder. The most common types of complication included fistula formation, development of a false aneurysm, and hemorrhage. The human cadaver pelvis demonstrated the proximity of intrapelvic vessels, the bladder, the ureter, the vagina, the deferent duct, the sigmoid colon, the rectum, and the sciatic nerve to an intrapelvically intruded prosthesis.
    Conclusions: Failed total hip replacements should be considered to cause damage to pelvic viscera.
    MeSH term(s) Aneurysm, False/etiology ; Arthroplasty, Replacement, Hip/adverse effects ; Cadaver ; Digestive System Fistula/etiology ; Foreign-Body Migration ; Gastrointestinal Hemorrhage/etiology ; Humans ; Pelvis/injuries ; Pelvis/pathology ; Postoperative Complications ; Prosthesis Failure
    Language English
    Publishing date 2001-12-07
    Publishing country United States
    Document type Journal Article ; Meta-Analysis
    ZDB-ID 2953-1
    ISSN 1879-1883 ; 0002-9610
    ISSN (online) 1879-1883
    ISSN 0002-9610
    DOI 10.1016/s0002-9610(01)00845-5
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  6. Article: Scoring systems in total knee arthroplasty.

    Bach, Christian Michael / Nogler, Michael / Steingruber, Iris Eva / Ogon, Michael / Wimmer, Cornelius / Göbel, Georg / Krismer, Martin

    Clinical orthopaedics and related research

    2002  , Issue 399, Page(s) 184–196

    Abstract: For assessment of total knee arthroplasty outcome, various scoring systems have been introduced. The current study assessed the interobserver correlation of four commonly used total knee arthroplasty outcome scores. One hundred eighteen total knee ... ...

    Abstract For assessment of total knee arthroplasty outcome, various scoring systems have been introduced. The current study assessed the interobserver correlation of four commonly used total knee arthroplasty outcome scores. One hundred eighteen total knee arthroplasties were investigated by two independent observers, using the Hungerford score, the Hospital for Special Surgery score, the Knee Society score, and the Bristol score. Each score consisted of three subscores: pain, knee, and function. For the highest interobserver correlation was computed for the Bristol score (interobserver correlation coefficient, 0.88). For knee range of motion, flexion contracture, and extension lag there was high interobserver correlation (interobserver correlation coefficient > 0.8 each). For walking distance and walking aids, there also was a high interobserver correlation (interobserver correlation coefficient > 0.7 each). For clinical assessment of total knee arthroplasty, pain should be measured on a four-step system, the knee should be assessed by measurement of range of motion, extension lag, and flexion contracture, and function should be measured on a separate score assessing walking distance and walking aids.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Cohort Studies ; Evaluation Studies as Topic ; Female ; Humans ; Knee Prosthesis/adverse effects ; Male ; Middle Aged ; Observer Variation ; Osteoarthritis, Knee/surgery ; Pain Measurement ; Patient Satisfaction ; Range of Motion, Articular/physiology ; Severity of Illness Index ; Treatment Outcome ; Walking/physiology
    Language English
    Publishing date 2002-05-13
    Publishing country United States
    Document type Comparative Study ; Journal Article
    ZDB-ID 80301-7
    ISSN 1528-1132 ; 0009-921X
    ISSN (online) 1528-1132
    ISSN 0009-921X
    DOI 10.1097/00003086-200206000-00022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Direct digital radiography versus storage phosphor radiography in the detection of wrist fractures.

    Peer, Siegfried / Neitzel, Ulrich / Giacomuzzi, Salvatore M / Pechlaner, Sigurd / Künzel, Karl Heinz / Peer, Regina / Gassner, Eva / Steingruber, Iris / Gaber, O / Jaschke, Werner

    Clinical radiology

    2002  Volume 57, Issue 4, Page(s) 258–262

    Abstract: Aim: To define the value of digital radiography with a clinical flat panel detector system for evaluation of wrist fractures in comparison with state of the art storage phosphor radiography.: Material and methods: Hard copy images of 26 fractured ... ...

    Abstract Aim: To define the value of digital radiography with a clinical flat panel detector system for evaluation of wrist fractures in comparison with state of the art storage phosphor radiography.
    Material and methods: Hard copy images of 26 fractured wrist specimens were acquired with the same exposure dose on a state of the art storage phosphor radiography system and a clinical flat panel detector. Image features like cortical bone surface, trabecular bone, soft tissues and fracture delineation were independently analysed by 4 observers using a standardised protocol. Image quality ratings were evaluated with an analysis of variance (ANOVA).
    Results: Flat panel detector radiographs were rated superior with respect to cortical and trabecular bone representation as well as fracture evaluation, while storage phosphor radiographs produced better soft tissue detail.
    Conclusion: In some of the observed image quality aspects, the performance of caesium iodide/amorphous silicon flat panel detector exceeds state of the art storage phosphor radiography. This makes it well suited for skeletal imaging particularly in trauma as seen in the detection of wrist fractures.
    MeSH term(s) Analysis of Variance ; Fractures, Bone/diagnostic imaging ; Humans ; Observer Variation ; Radiographic Image Enhancement ; Reproducibility of Results ; Technology, Radiologic ; Wrist Injuries/diagnostic imaging ; X-Ray Intensifying Screens
    Language English
    Publishing date 2002-04
    Publishing country England
    Document type Comparative Study ; Evaluation Studies ; Journal Article
    ZDB-ID 391227-9
    ISSN 1365-229X ; 0009-9260
    ISSN (online) 1365-229X
    ISSN 0009-9260
    DOI 10.1053/crad.2001.0797
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  8. Article: Pretransplantation evaluation of the cirrhotic liver with explantation correlation: accuracy of CT arterioportography and digital subtraction hepatic angiography in revealing hepatocellular carcinoma.

    Steingruber, Iris E / Mallouhi, Ammar / Czermak, Benedikt V / Waldenberger, Peter / Gassner, Eva / Offner, Felix / Chemelli, Andreas / Koenigsrainer, Alfred / Vogel, Wolfgang / Jaschke, Werner R

    AJR. American journal of roentgenology

    2003  Volume 181, Issue 1, Page(s) 99–108

    Abstract: Objective: The aim of this study was to determine the accuracy of CT arterioportography and hepatic digital subtraction angiography, separately and combined, for the detection of hepatocellular carcinoma in the cirrhotic liver by using thin-section ... ...

    Abstract Objective: The aim of this study was to determine the accuracy of CT arterioportography and hepatic digital subtraction angiography, separately and combined, for the detection of hepatocellular carcinoma in the cirrhotic liver by using thin-section liver explant histopathologic findings.
    Subjects and methods: Fifty-nine patients with liver cirrhosis were examined with CT arterioportography and digital subtraction angiography as a part of preoperative diagnostic workup for liver transplantation. Before liver explantation, CT arterioportograms and digital subtraction angiograms were prospectively evaluated in a blinded manner, separately by two CT radiologists and two angiographers, respectively, and combined by two reviewer teams, each including a CT radiologist and an angiographer. In addition, each examination was retrospectively evaluated using direct comparison with the corresponding thin-section liver explant specimens
    Results: There were 39 histologically confirmed hepatocellular carcinomas. In both prospective and retrospective assessments, the reviewers achieved the best performance with CT arterioportography and digital subtraction angiography combined (area under the curve [A(z)] 0.82). The diagnostic confidence in the detection of hepatocellular carcinoma was higher with digital subtraction angiography (A(z), 0.81) than that with CT arterioportography (A(z), 0.68). Prospectively, sensitivity and specificity were 75% and 60% for CT arterioportography, 77% and 80% for digital subtraction angiography, and 84% and 81% for CT arterioportography and digital subtraction angiography combined, respectively. Retrospectively, sensitivity and specificity were 80% and 62% for CT arterioportography; 82% and 79% for digital subtraction angiography; 87% and 81% for CT arterioportography and digital subtraction angiography combined, respectively. Five hepatocellular carcinomas, one poorly and four well differentiated, with a mean size of 1.4 cm were not detectable on the CT arterioportography and digital subtraction angiography combination. False-positive findings were 20, 11, and 10 on CT arterioportography, digital subtraction angiography, and the CT arterioportography and digital subtraction angiography combination.
    Conclusion: Combining CT arterioportography with digital subtraction angiography enabled reliable detectability of moderately and poorly differentiated hepatocellular carcinomas in cirrhotic livers but was less sensitive for the detection of well-differentiated hepatocellular carcinomas and resulted in a relatively high rate of false-positive findings.
    MeSH term(s) Angiography, Digital Subtraction ; Carcinoma, Hepatocellular/complications ; Carcinoma, Hepatocellular/diagnostic imaging ; Carcinoma, Hepatocellular/surgery ; False Positive Reactions ; Female ; Humans ; Liver/pathology ; Liver Cirrhosis/complications ; Liver Cirrhosis/diagnostic imaging ; Liver Cirrhosis/surgery ; Liver Neoplasms/complications ; Liver Neoplasms/diagnostic imaging ; Liver Neoplasms/surgery ; Liver Transplantation ; Male ; Middle Aged ; Portography/methods ; Preoperative Care ; Prospective Studies ; ROC Curve ; Retrospective Studies ; Sensitivity and Specificity ; Tomography, X-Ray Computed
    Language English
    Publishing date 2003-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 82076-3
    ISSN 1546-3141 ; 0361-803X ; 0092-5381
    ISSN (online) 1546-3141
    ISSN 0361-803X ; 0092-5381
    DOI 10.2214/ajr.181.1.1810099
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