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Biomedical subjects

P Schnarkowski

Publications and source records attributed to P Schnarkowski.

49 records · Page 3Linked to original sources
PubMed1992

[Computed tomographic aspects of intestinal intussusception].

This article describes typical CT findings of intestinal intussusception of different genesis and localisation. It is shown that a characteristic image resembling a target is obtained both in case of an invaginated Meckel's diverticulum, an idiopathic ileocolic intussusception in an infant, and in colorectal invagination in condition after resection of a polyp of the sigmoid. Compared with the conventional imaging methods such as sonography, colon contrast enema or contrast imaging of the small intestine, CT enables not only unequivocal diagnosis of intestinal invagination but frequently also the identification or exclusion of underlying causes that trigger the phenomenon.

Colonic Diseases↗
PubMed1991

[Sonographic detection of splenic injuries after blunt abdominal trauma].

During one year 150 patients with blunt abdominal trauma were scanned by ultrasound on the day of admittance. In 18 patients a splenic lesion was diagnosed by ultrasound. These lesions consisted of 12 splenic ruptures and of 6 splenic haematomas. The diagnosis was confirmed in 9 cases by laparotomy, in 7 cases by computed tomography and in 2 cases by sonographic follow-up. In all patients ultrasound was used in the follow-up assessment. Emergency sonography was not only a reliable diagnostic tool, but was also appropriate as an easy follow-up imaging.

Abdominal Injuries↗
PubMed1991

[Cervical spinal injuries in craniocerebral trauma: their x-ray diagnosis on the day of the accident].

To investigate cervical spine injuries and to evaluate cervical radiography 100 patients were reviewed who were referred to computed tomography of the head because of blunt head trauma. 15 sustained cervical injury, 11 were located at the lower level of the cervical spine. Six fractures of the lower cervical spine were detected by additional radiographs. The diagnosis was established by computed tomography in three cases. To rule out cervical injuries in patients with incomplete visualisation of the lower cervical spine, cervical computed tomography should be performed in addition to lateral, anterioposterior, and open-mouth views.

Adult↗
PubMed1990

[Scintigraphy using erythrocytes labeled in vivo with 99mTc. Detection of an intestinal hemorrhage following a duodenum-preserving resection of the pancreas head].

Following resection of the head of the pancreas while preserving the duodenum a gastrointestinal haemorrhage was localised by red blood cells labeled in vivo with technetium-99m. The previously performed endoscopy and angiography were normal. The haemorrhage in the region of the pancreatico-jejunal anastomosis was confirmed intraoperatively. If intermittent bleedings are suspected, scintigraphy should be performed as a routine measure besides endoscopy and angiography.

Chronic Disease↗
PubMedDate not supplied

Ultrasonography of capsular morphology in normal and traumatic ankle joints.

Ultrasonography was used to inspect the ankle anatomy of 20 healthy volunteers. The images produced were correlated with anatomical structures by examining three dissected cadaver ankles. The anterolateral pouch of the articular capsule was identified by ultrasonography in 91% of the normal ankle joints as a hypoechoic area. The posterolateral pouch of the articular capsule also could be identified by ultrasonography as a hypoechoic area in 84% of the normal ankles examined. The lateral aspect of 105 traumatized ankles was examined subsequently. The ultrasound results agreed in 100% of the cases with the operative findings for the anterior talofibular ligament and in 92% for the calcaneofibular ligament.

Adult↗
PubMedDate not supplied

Flushable stent-system for internal drainage in occlusive jaundice.

The effectiveness of biliary stents may be reduced as a result of obstruction by tumor material, bile salts or detritus. To circumvent this problem we developed a prosthesis system, which allows flushing and repetitive radiological control via a subcutaneous port. Prostheses were implanted in 26 patients presenting with inoperable occlusive lesions of the bile duct. Patency was regularly monitored by checking the bilirubin and alkaline phosphatase levels and using port-cholangiography. Catheter function was easily maintained in 92% of the patients and ended upon malignancy related death. In case of dysfunction, drainage could generally be restored with intensive flushing. This new flushable stent-system was easily implantable, could be exchanged without renewed percutaneous transhepatic puncture and allowed flushing, external drainage, bile probes for bacteriological examinations and follow up cholangiography via the subcutaneous placed port.

Cholestasis↗
PubMedDate not supplied

Tibial shaft fractures: assessment of fracture healing with computed tomography.

OBJECTIVE: To assess the capability of CT in assessing stability of tibial shaft fractures with planimetry. MATERIALS AND METHODS: Eighteen patients with fracture of the tibial shaft were treated by external fixator. All patients underwent CT 1, 6, 12, and 18 weeks postoperatively to assess the fracture healing. The callus formation and compacta were determined with planimetry. Fractometry, a noninvasive method to measure stability, was used as the gold standard to determine the stability of the fracture. RESULTS: The patients were divided into three groups according to different periods of time for removal of external fixation. Twelve patients with stable fractures showed a steady increase of callus, which was 50% higher after 12 weeks. Three patients with delayed fracture healing demonstrated an increase of callus of > 50% after 18 weeks. Three patients with unstable fractures obtained only callus formation of < 20% after 15-18 weeks. The external fixator was removed and endomedullary nails were used for stabilization. CONCLUSION: The CT data allow quantification of callus and compacta formation and are able to determine the stability of tibial shaft fractures.

Adolescent↗
PubMedDate not supplied

Liver transplantation: significance of the periportal collar on MRI.

OBJECTIVE: Liver transplantation is performed with increasing success and frequency all over the world. Experience with MRI of the liver allograft is, however, limited. This study was designed to correlate MRI to clinical-laboratory findings, CT, and biopsy and to evaluate the significance of the periportal collar on MRI. MATERIALS AND METHODS: Fourteen patients who had undergone orthotopic liver transplantation were studied by CT and MRI [T1-weighted imaging: gradient-echo, repetition time/echo time (TR/TE) 306/14 ms, theta 90 degrees; proton density and T2-weighted imaging: spin-echo, TR/TE 1,600/30-120 ms]. Three patients also had follow-up MR examinations 43 days, 89 days, and 5 months after transplantation. RESULTS: Magnetic resonance imaging demonstrated a perivascular collar around central portal venous branches in all 14 patients and around peripheral portal branches in 10 of the 14 patients on the initial MRI study. The perivascular collar showed low signal intensity on T1-weighted imaging and an increase in signal intensity on T2-weighted multiecho imaging. The distribution and prevalence of central and peripheral periportal collars were identical on MR and CT. Peripheral periportal collars were seen in 9 patients who had no clinical-laboratory signs of rejection. In 3 patients with biopsy-proved rejection, the periportal collar was less prominent on MR at the time of rejection when compared with MR performed when the patient had no signs of transplant rejection. CONCLUSION: A perivascular collar in a patient with liver transplantation is likely to be related to impaired lymph drainage after surgical interruption of the draining lymph vessels and lymphedema. In contrast to previous CT reports, however, a perivascular collar around peripheral portal branches does not appear to correlate to rejection, since it is frequently observed in the normal liver allograft.

Adult↗