Biomedical subjects

M Dittrich

Publications and source records attributed to M Dittrich.

At least 55 records · Page 3Linked to original sources

PubMed1985

Sonographic biometry in obstructive uropathy of children: preoperative diagnosis and postoperative monitoring.

Renal sonography was performed in 92 children with obstructive uropathy or vesicoureteral reflux preoperatively and at follow-up. Renal volume and the anteroposterior diameter of the renal pelvis proved to be the most reliable morphometric criteria for objective sonographic staging and follow-up of urinary tract obstruction. If transient obstruction occurred after uncomplicated antireflux ureterovesico-plasties (n = 41), it lasted at most 4 weeks. Kidneys with transient postoperative ureterovesical junction obstruction (n = 21) reverted to normal sonographic pattern within 4 weeks following ureteral reimplantation. In cases of ureteropelvic junction obstruction (n = 30), it took up to 6 months for the majority of kidneys to present almost normal sonographic findings. Sonographic biometry and the knowledge about the uncomplicated postoperative course render postsurgical monitoring easier and more reliable.

Adolescent↗

PubMed1985

Morbidity in urinary schistosomiasis: relation between sonographical lesions and pathological urine findings.

213 patients with urinary schistosomiasis were investigated under field conditions in the Peoples Republic of Congo by quantitative parasitological examination, urine analysis and abdominal ultrasonography. The study group consisted mainly of children. Disease related pathological ultrasonographical findings were dependent on the intensity of infection. Sixty patients had bladder wall thickening and 55 patients had vesical polyps. Those with multiple vesical polyps were the only patients with urinary retention and they had a significantly higher proteinuria than those with a singular polyp. Obstructive uropathy of different degrees was encountered in 50 cases. Of these, 21 patients had moderate to severe urinary tract obstruction and in all cases except one also presented concomitant vesical abnormalities. Nine patients revealed bilateral obstructive uropathy. Lesions of the lower urinary tract were a predisposing factor in the development of urinary tract obstruction. Morbidity of study patients was considered to be substantial. A proteinuria of more than one gramme per litre in spontaneously voided midday urine indicated a high probability for the presence of urinary tract obstruction and was considered an urgent indication for antischistosomal treatment.

Adolescent↗

PubMed1984

Sonographic evidence of intraperitoneal fluid. An experimental study and its clinical implications.

In order to evaluate the sensitivity of ultrasound to intraperitoneal fluid, such as ascites or blood, an experimental study was performed in the pig. Various amounts of fluid were injected into the peritoneal cavity to investigate distribution and diagnostic criteria in different positions. As little as 10 ml of fluid was visualized around the urinary bladder in an upright position. In the supine position, 20 ml could be detected around the bladder and 30 ml around the liver. The injection of at least 60 ml resulted in a pattern of free-floating bowel loops. The sonographic findings of fluid distribution were correlated to radiological studies. As different amounts of fluid produce characteristic sonographic patterns, an approximate estimation of the intraperitoneal fluid volume can be made.

Animals↗

PubMed1983

Sonographic biometry of liver and spleen size in childhood.

In 194 healthy children of all ages, sonographic measurements of the liver and spleen were performed on standardized section planes and normal values established. These measurement values showed an approximately linear increase in the course of development and correlated best with the body length. For a rapid orientational evaluation of the liver size, sonographic nomograms of the individual measurements were developed. The spleen size was determined by volume calculation. On the basis of an index of liver size, which was calculated from the individual measurements, a diagram for simultaneous determination of liver and spleen size could be developed. These nomograms permit objective morphometry of size changes in the two organs.

Adolescent↗

PubMed1983

[Sonographic diagnosis of the bile ducts in childhood].

The prerequisite for the sonographic diagnosis of biliary tract pathology is the recognition of the normal biliary tract even in neonates, as demonstrated in a prospective study on 78 neonates. Contraction of the gallbladder as a sign of biliary excretion into the duodenum could be regularly observed. The sonographic patterns typical of common bile duct obstruction, choledochal cyst, biliary atresia, neonatal hepatitis, paucity of the interlobular ducts, Caroli's disease, cholecystectasia, cholecystitis and cholecystolithiasis are described. Based on the findings in 26 infants with proven cholestatic syndrome, the diagnostic significance of the established sonographic criteria is discussed.

Bile Ducts↗

PubMed1983

[Sonographic diagnosis of urine flow disorders in childhood].

Sonographic diagnosis of urinary tract obstruction is based upon morphological and morphometrical criteria, which can be used for the grading of obstructive uropathy. In particular, morphometric data improve the accuracy of the diagnosis. Measurement of the anterio-posterior diameter of the renal pelvis and assessment of the renal volume will make postoperative monitoring more objective and therefore safer. Diuresis sonography, under standardized conditions, excludes false negative findings and clarifies borderline cases of suspected obstruction of the urinary tract. Renal sonography is a reliable method for excluding and diagnosis of urinary tract obstruction in childhood, when one is aware of its limitations.

Child↗

PubMed1983

[Sonographic diagnosis of the central nervous system in the neonate and infant--pathomorphology, indications and value].

Standardized cerebral sonography permits early diagnosis of intracranial abnormalities and follow-up of high-risk neonates and infants during the first year of life. In the last three years 782 neonates and infants were examined using a real-time sector scanners (3,5--7,5 MHz). Echogenicity of parenchymal structures as well as the ventricular system, the subarachnoid space and the choroid plexus were routinely investigated. Based on morphological criteria a stage classification of brain haemorrhage into five degrees of severity has been developed. The sonographic pattern of normal anatomy, various types of hydrocephalus, intracranial infectious pathology, brain tumor and meningomyelocele is described. Sonographic monitoring facilitates the decision on conservative or neurosurgical treatment of hydrocephalus.

Brain↗

PubMed1983

Sonographic diagnosis of intussusception in childhood.

The diagnosis of intussusception was established in 26 children by sonography alone. In 23 cases barium enema confirmed the diagnosis; two cases because of longstanding intussusception and one case after intestinal anastomosis were confirmed by surgery alone; in two additional cases barium enema ruled out the sonographically suspected intussusception. No positive finding was missed by sonography, which proved to be an accurate method for the diagnosis of intussusception. The sonographic findings of idiopathic intussusception and intussusception caused by lymphosarcoma are presented.

Adolescent↗

PubMed1981