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  • 1
    ISSN: 1432-2161
    Keywords: Dual-energy quantitative computed tomography ; Basis material decomposition ; Accuracy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Quantitative computed tomography is an established method for the non-invasive assessment of bone mineral content. Scanning with two different X-ray energies allows material-selective image reconstruction and separation on the basis of differing atomic numbers. As proven by chemophysical analysis of 45 bone samples, dual-energy quantitative computed tomography with basis material decomposition allows highly accurate measurement of bone mineral density with an error of 1.4%, independent of fat and soft tissue content.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Der Radiologe 39 (1999), S. 320-322 
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Hypothenar-Hammer-Syndrom ; A. ulnaris ; Regionale Thrombolyse ; rt-PA ; Key words Hypothenar hammer syndrome ; Ulnar artery ; Regional thrombolysis ; rt-PA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The hypothenar hammer syndrome (HHS) is characterized by lesions of the ulnar artery secondary to repetitive trauma to the hypothenar eminence. We report the case of an orthopedic surgeon with HHS due to his occupational practice. Angiography and MRI confirmed an aneurysm of the ulnar artery and embolic occlusions of his carpal and digital arteries. Patency was reestablished with regional thrombolysis using rt-PA. So far there have been no reports on thrombolysis with rt-PA in HHS.
    Notes: Zusammenfassung Wir berichten über die erfolgreiche regionale Lyse multipler embolischer Verschlüsse der Hand mit rt-PA bei einem Patienten mit einem Aneurysma der A. ulnaris bei Hypothenar-Hammer-Syndrom (HHS). Schädigungen der A. ulnaris aufgrund wiederholter mechanischer Traumen des Handballens kennzeichnen das HHS. Uns wurde ein Orthopäde vorgestellt, der sich bei seiner operativen Tätigkeit ein HHS zugezogen hatte. Angiographie und Kernspintotomographie bestätigten ein Aneurysma der A. ulnaris und embolische Verschlüsse der Handarterien. Mit Erfolg wurde rt-PA zur regionalen Lyse am Unterarm eingesetzt. Bislang liegen keine Berichte über den Einsatz von rt-PA beim HHS vor.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Aortendissektion ; Intimointimale Invagination ; CT ; Angiographie ; Key words Aortic dissection ; Intimointimal intussusception ; Computed tomography ; Angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Intimointimal intussusception is a rare type of aortic dissection. The intimal tear occurs circumferentially with intussusception of the intimal flap downstream into the aortic arch causing obstruction of the great supraaortic vessels. A CT diagnosis has only once been reported. CT and angiographic findings of this rare complication of aortic dissection are described.
    Notes: Zusammenfassung Die CT-Diagnose einer seltenen Form einer Aortendissektion, die intimointimale Invagination bei zirkulärer Dissektion der Aorta ascendens, wird vorgestellt. Bei diesem Typ der Aortendissektion liegt ein zirkulärer Intimariß mit Einstülpung des Intimaschlauches in den Aortenbogen vor. Dabei erscheint der in das Aortenlumen invaginierte Intimaschlauch in axialer Schnittführung als Ringfigur im Aortenlumen. Neben den typischen CT-Befunden wird auch das angiographische Erscheinungsbild der intimointimalen Invagination beschrieben.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Der Radiologe 36 (1996), S. 663-666 
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Malignes Schwannom ; Rektum ; CT ; MRT ; Key words Malignant schwannoma ; Rectum ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Malignant schwannomas are rare. These malignomas are primary nerve sheath tumors that usually arise from a peripheral nerve. They appear most frequently in the lower extremities, including the hips and buttocks (34.8 %), the upper extremities (23.4 %), and in the trunk (17 %). To the best of our knowledge, this is the first reported case of a malignant schwannoma of the rectum. We describe the rare disease with reference to the literature.
    Notes: Zusammenfassung Maligne Schwannome haben einen Anteil von 10 % an den malignen Weichteiltumoren, welche nur 1 % aller bösartigen Neubildungen ausmachen. Am häufigsten treten die malignen Schwannome im Bereich der unteren Extremitäten einschließlich Hüfte und Gesäß (34,8 %), im Bereich der oberen Extremitäten (23,4 %) und im Rumpf (17 %) auf. Unseres Wissens ist dies der erste Fall eines malignen Schwannoms des Rektums, der in der Weltliteratur beschrieben wird. Wir berichten über das seltene Krankheitsbild und geben einen Überblick über die Literatur.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Der Anaesthesist 43 (1994), S. 245-248 
    ISSN: 1432-055X
    Keywords: Schlüsselwörter: Epidurales Hämatom – Single shot-Epiduralanästhesie – Punktionstrauma – Blutgerinnung ; Key words: Epidural haematoma – Single-shot epidural anaesthesia – Puncture trauma – Blood coagulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract. The formation of an epidural or subdural haematoma is a well-known but very rare complication when anaesthetic procedures are conducted near the spinal cord. The major reasons are impaired blood coagulation and the trauma of puncture, which represents the initiating factor and determines the extent of the vascular lesion, while defective coagulation may cause the bleeding to continue. We report on a 30-year-old slender female patient of ASA group II undergoing epidural anaesthesia at L3/4 with a 19-gauge Crawford needle for an ankle joint injury. Unexpected puncture difficulties made several approaches necessary. Prevention of thrombosis with low-molecular heparin was not started preoperatively but 8 h following the intervention. On the first postoperative day the patient was mobilized and, in spite of the repeated punctures, there were no complaints until the fourth postoperative day. Subsequently, sudden significant complaints occurred, first suggesting infection near the spinal cord. Immediate magnetic resonance imaging revealed an epidural haematoma, which did not require intervention. Puncture of the spinal fluid was not performed. Laboratory analysis of coagulation showed a prothrombin time of 56%; PTT was normal with 36 s. Following three days of symptomatic therapy, the complaints had improved markedly, so that mobilization could be started again. For another 10 days the patient had a minor diffuse sensation of pressure when moving the lumbar spine in this region. Subsequently, there were no complaints at all, as proved by an investigation one year later. Unfortunately, the patient refused to undergo another MRT at that time. In the present case the haematoma was caused by tissue trauma due to several puncture attempts. The prognosis largely depends on early recognition of the symptoms, which in our case became manifest only after several days, as well as the immediate employment of special diagnostic procedures and, if necessary, surgical intervention. At present, it is not possible to conduct a statistical analysis on the question of whether there is a higher incidence of haematoma in single-shot anaesthesia than in continuous anaesthesia.
    Notes: Zusammenfassung. Die Entstehung eines epi- oder subduralen Hämatoms ist eine bekannte, jedoch sehr seltene Komplikation rückenmarknaher Leitungsanästhesien [9]. Wesentliche Ursachen sind unter anderem eine gestörte Blutgerinnung und das Punktionstrauma, wobei letzteres den auslösenden Faktor darstellt und das Ausmaß der Gefäßläsion bestimmt, während erstere die eingetretene Blutung unterhalten kann. In dem hier geschilderten Fall einer Epiduralanästhesie bei einer gesunden 30jährigen Patientin ist infolge mehrfacher Punktionsversuche das Gewebstrauma als Hämatomursache anzusehen, zumal keine präoperative Heparinisierung durchgeführt wurde. Wichtig für die Prognose ist das rechtzeitige Erkennen von Frühsymptomen, die in unserem Fall erst nach vier Tagen (!) auftraten sowie der umgehende Einsatz spezieller Diagnostik und – falls nötig – der operativen Hämatomausräumung. Ob hinsichtlich der Hämatomrate der Single shot- gegenüber der Katheter-Technik der Vorrang zu geben wäre, wird sich derzeit wohl kaum statistisch ermitteln lassen.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Der Unfallchirurg 100 (1997), S. 186-192 
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Schultergelenkinstabilität ; Diagnostik ; CT-/MRT-Arthrographie ; Key words MRT-Arthrography ; Improved diagnostic procedure in shoulder instability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: In a prospective study, we examined 34 patients with shoulder instabilities and 5 patients with unclear chronic shoulder pain (4 females, 35 males; 18 – 56 years of age, median 28 years) by CT arthrography and MRT arthrography from August 1994 through December 1995. No complications were seen when gadolinium-DPTA was applied intra-articularly. Twenty-three patients were follwed up by operation and/or arthroscopy; 20 patients underwent a modified, open Bankart operation. In this paper, we present a new classification for damage of the anterior capsule and labrum. MRT arthrography showed better results in judging the anterior labrum and in determining the degree of damage to the labrum (sensitivity, specificity and accuracy 100%) in comparison with CT arthrography (sensitivity 90%, specificity 100%, accuracy 91%). Furthermore, MRT arthrography gave clearer results than CT arthrography regarding SLAP and cartilage lesions. Thus, MRT arthrography has proved to be a very exact method for diagnosing shoulder instabilities and is superior to CT arthrography in diagnostic accuracy.
    Type of Medium: Electronic Resource
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