| 51. |
- Nyman, Ulf, et al.
(författare)
-
Chronic aortic dissection: stenting of aortic true lumen obliteration with late dynamic variations of both lumens
- 1999
-
Ingår i: Cardiovascular and Interventional Radiology. - : Springer Science and Business Media LLC. - 1432-086X .- 0174-1551. ; 22:2, s. 135-149
-
Tidskriftsartikel (refereegranskat)abstract
- Percutaneous endovascular techniques were used to treat an arteriovenous fistula (AVF) associated with pancreatic transplantation. A pancreatic transplant superior mesenteric artery-to-superior mesenteric-vein AVF was successfully embolized while flow to the pancreas transplant was preserved. The embolization was aided by the use of Guglielmi detachable coils and a detachable balloon. No complications were encountered. At 23 months follow-up, the patient is doing well with no recurrence.
|
|
| 52. |
- Nyman, Ulf, et al.
(författare)
-
Kronisk mesenteriell ischemi. Endovaskulär behandling lika effektiv som öppen kirurgi
- 1998
-
Ingår i: Läkartidningen. - 0023-7205. ; 95:36, s. 3785-3790
-
Tidskriftsartikel (refereegranskat)abstract
- Chronic mesenteric ischaemia is a rare but serious condition, which if untreated may cause death secondary to starvation or bowel infarction. As the symptoms are sometimes unspecific, its diagnosis may be delayed or missed. Although open surgical revascularisation has been the traditional treatment, a review of published reports suggests it to be associated with operative mortality rates of 6-9 per cent, and major morbidity rates of 22-26 per cent. Reports by others, and our own experience, suggest that endovascular treatment of mesenteric atherosclerotic obstructions with PTA (percutaneous transluminal angioplasty) and stenting may yield patency rates differing little from those associated with surgery, but significantly lower mortality (1.6%) and morbidity (5.6%).
|
|
| 53. |
- Olsson, Rolf, et al.
(författare)
-
Simultaneous videoradiography and pharyngeal solid state manometry (videomanometry) in 25 nondysphagic volunteers
- 1995
-
Ingår i: Dysphagia. - 1432-0460. ; 10:1, s. 36-41
-
Tidskriftsartikel (refereegranskat)abstract
- Recent technological advances in manometry, including solid state transducers and computerized analysis, allows for reliable interpretation of intraluminal pharyngeal pressures. Simultaneous videoradiography (barium swallow) provides fluoroscopic control of the manometric sensors (videomanometry), thereby eliminating the uncertainty of sensor dislocation during laryngeal elevation. This is the first study describing normal manometric parameters in videomanometry during barium swallow. Seven manometric parameters and six videoradiographic parameters were analyzed. We included 25 nondysphagic volunteers with normal videoradiographic parameters in the study. The examination was performed in an upright physiologic position during 10-ml barium and dry swallows. Mean resting pressure in the upper esophageal sphincter was 89.6 +/- 32.6 (+/- 2 SD) mmHg. Mean residual pressure during relaxation of the upper esophageal sphincter was 7.2 +/- 8.0 (+/- 2 SD) mmHg during barium swallow and 3.8 +/- 6.2 (+/- 2 SD) mmHg during dry swallow. The mean duration of upper esophageal sphincter relaxation was 601 +/- 248 (+/- 2 SD) msec. The mean peristaltic contraction of the upper esophageal sphincter was 253.8 +/- 142.8 (+/- 2 SD) mmHg. Fourteen (56%) of the 25 had a measurable intrabolus pressure (mean 33.2 +/- 17.3 mmHg) at the level of the inferior pharyngeal constrictor. A specific finding was discovered when the epiglottis tilts down hitting the manometric sensor. This epiglottic tilt was identified in 7 subjects (28%) and caused pressures of around 600 mmHg. A standardized manometric technique is important in videomanometry, and normal values as described in this study are essential in clinical use.
|
|
| 54. |
- Resch, Tim, et al.
(författare)
-
Abdominal aortic aneurysm morphology in candidates for endovascular repair evaluated with spiral computed tomography and digital subtraction angiography
- 1999
-
Ingår i: Journal of Endovascular Surgery. - 1074-6218. ; 6:3, s. 227-232
-
Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: To analyze the morphology of abdominal aortic aneurysms (AAAs) and to study the usefulness of spiral computed tomography (CT) versus digital subtraction angiography (DSA) in the evaluation of patients for endovascular repair. METHODS: Of 133 AAA patients (120 men, mean age 67 years, range 52 to 84) evaluated preoperatively with CT imaging, 77 endograft candidates (68 men) were also assessed with intra-arterial DSA. Arterial parameters were measured on axial CT scans and angiographic films for comparison. RESULTS: Mean maximum AAA diameter was 58 +/- 11 mm (range 39 to 95). Aneurysmal neck diameter was consistently smaller on DSA than on CT (20.7 +/- 3.6 mm versus 23.0 +/ 3.5 mm, p < 0.0001). The distance from the most distal renal artery to the aortic bifurcation was longer on angiography than on CT (mean difference 10.0 mm, p < 0.0001). There was a positive correlation between the maximum AAA diameter and the AAA length (r = 0.49, p < 0.0001) and an inverse relationship between the neck length and the neck diameter (r = -0.36, p < 0.0001). No correlation was found between the maximum AAA diameter and maximum iliac diameter, angulation, or length. CONCLUSIONS: AAA anatomy varies widely and independently of the aneurysm size. Therefore, the maximum size of the aneurysm is a poor predictor of whether or not an aneurysm is suitable for endovascular repair. The discrepancy between angiographic and axial CT measurements suggests that neither alone is sufficient as a preoperative imaging technique when evaluating a patient for an endovascular graft procedure.
|
|
| 55. |
- Robertsson, Otto, et al.
(författare)
-
Intracapsular pressure and loosening of hip prostheses. Preoperative measurements in 18 hips
- 1997
-
Ingår i: Acta Orthopaedica Scandinavica. - : Medical Journals Sweden AB. - 0001-6470. ; 68:3, s. 231-234
-
Tidskriftsartikel (refereegranskat)abstract
- We measured the intracapsular pressure preoperatively in 18 hips (17 patients) before revision of a total hip arthroplasty because of aseptic loosening. Distension of the joint capsule was measured with sonography in 13 cases. In extension, the mean intracapsular pressure was 26 (0-60) mmHg, in extension and inward rotation it was 159 (24-280) mmHg, in extension and outward rotation it was 30 (3-67) mmHg and in 45 degrees of flexion it was 12 (0-28) mmHg. A mean of 6 (0.5-20) mL of joint fluid was aspirated after the pressure measurements. Sonography showed increased joint fluid/synovial edema and/or increased capsular thickness, as compared to 34 unrevised, radiographically not loose prosthetic hips, and that the capsular distension correlated to intracapsular pressure during extension and inward rotation. We conclude that the intracapsular pressure usually is elevated in a hip joint with loose prosthetic components, that the intracapsular pressure varies with the position of the hip and that capsular distension reflects increased intracapsular pressure. The increased and often very high pressure, varying during gait, may pump debris away from the joint along the interfaces and even by itself cause osteolysis and loosening.
|
|
| 56. |
- Sundgren, P C, et al.
(författare)
-
MRI and proton spectroscopy in a child with Rasmussen's encephalitis. Case report
- 1999
-
Ingår i: Neuroradiology. - : Springer Science and Business Media LLC. - 1432-1920 .- 0028-3940. ; 41:12, s. 935-940
-
Tidskriftsartikel (refereegranskat)abstract
- The greater sensitivity of magnetic resonance spectroscopy (MRS) compared with MRI to brain abnormalities in Rasmussen's encephalitis was demonstrated in a 3-year-old boy. The patient, with symptoms, signs and morphological findings consistent with Rasmussen's encephalitis, was followed with MRI and MRS over 30 months. That metabolic changes can be disclosed by MRS before the development of symptoms or signs was demonstrated as pathological spectra were found not only in the diseased left hemisphere but also in the morphologically normal right hemisphere before any neurological disturbance of that side.
|
|
| 57. |
- Önsten, Ingemar, et al.
(författare)
-
Hydroxyapatite augmentation of the porous coating improves fixation of tibial components. A randomised RSA study in 116 patients
- 1998
-
Ingår i: Journal of Bone and Joint Surgery: British Volume. - 2044-5377. ; 80-B:3, s. 417-425
-
Tidskriftsartikel (refereegranskat)abstract
- In a single-blind, randomised series of knee replacements in 116 patients, we used radiostereometric analysis (RSA) to measure micromotion in three types of tibial implant fixation for two years after knee replacement. We compared hydroxyapatite-augmented porous coating, porous coating, and cemented fixation of the same design of tibial component. At one to two years, porous-coated implants migrated at a statistically significantly higher rate than hydroxyapatite-augmented or cemented implants. There was no significant difference between hydroxyapatite-coated and cemented implants. We conclude that hydroxyapatite augmentation may offer a clinically relevant advantage over a simple porous coating for tibial component fixation, but is no better than cemented fixation.
|
|
| 58. |
- Önsten, Ingemar, et al.
(författare)
-
Migration and wear of a hydroxyapatite-coated hip prosthesis. A controlled roentgen stereophotogrammetric study
- 1996
-
Ingår i: Journal of Bone and Joint Surgery: British Volume. - 2044-5377. ; 78:1, s. 85-91
-
Tidskriftsartikel (refereegranskat)abstract
- A consecutive series of 30 total hip replacements using a hydroxyapatite (HA)-coated, modular implant (Omnifit) was followed clinically and by roentgen stereophotogrammetric analysis for two years and compared with two control groups, one of 27 cemented Charnley sockets and one of 40 cemented Charnley stems. Omnifit sockets with a central gap between the dome of the socket and the acetabular bone in the postoperative radiographs, migrated less than sockets without such gaps (p = 0.01). After adjustment for patient-related factors (age, gender and weight), no significant difference was found between the two prostheses with respect to micromotion and wear. We conclude that the early fixation of the HA-coated Omnifit prosthesis compares with that of the cemented Charnley prosthesis.
|
|
| 59. |
- Önsten, Ingemar, et al.
(författare)
-
Migration of uncemented, long-stem femoral components in revision hip arthroplasty. A 2-8 year clinical follow-up of 45 cases and radiostereometric analysis of 13 cases
- 1995
-
Ingår i: Acta Orthopaedica Scandinavica. - : Medical Journals Sweden AB. - 0001-6470. ; 66:3, s. 220-224
-
Tidskriftsartikel (refereegranskat)abstract
- We reviewed after 48 (24-90) months the clinical results in 45 cases of revision hip arthroplasties where an uncemented, long-stem femoral prosthesis (BIAS, Zimmer) had been used. A subgroup of 13 cases was followed with radiostereometric analysis (RSA) for 2 years. 3/45 cases had been revised, another 12 had unsatisfactory pain scores. The median Harris score was 69 (26-99). 12/13 stems migrated; 11 subsided 4.1 (0.4-7.9) mm, and 8 migrated posteriorly 2.9 (1.9-9.6) mm. The poor clinical results and large migrations speak against the use of this prosthesis in revision hip arthroplasty.
|
|
| 60. |
- Önsten, Ingemar, et al.
(författare)
-
Wear in uncemented porous and cemented polyethylene sockets: a randomised, radiostereometric study
- 1998
-
Ingår i: Journal of Bone and Joint Surgery: British Volume. - 2044-5377. ; 80-B:2, s. 345-350
-
Tidskriftsartikel (refereegranskat)abstract
- We used radiostereometric analysis to compare wear rates between uncemented porous sockets and cemented all-polyethylene sockets in a series of 102 hips randomised for either a Harris-Galante or a Charnley cup. Wear was evaluated in 95 hips at a mean of five years (2 to 7). All hips had a cemented, 22 mm head mono-bloc Charnley stem. The mean annual wear rate was 0.09 mm in the Charnley sockets and 0.10 mm in the Harris-Galante sockets, with no statistically significant differences in wear, migration or rotation. We conclude that, up to five years, the wear characteristics of the modular and porous Harris-Galante socket resemble that of the Charnley socket.
|
|
