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At least 847 records · Page 47Linked to original sources
PubMed1978

[Cine radiography and manometry after Nissen fundoplication (author's transl)].

Following Nissen fundoplication, there is incomplete correlation between the radiological appearances and the patients' subjective symptoms. Radiology is nevertheless an important method of examination after operation. Conventional barium examination with fluoroscopy readily demonstrates the anatomical changes. Dynamic changes, such as oesophageal reflux or delayed contrast passage, are also demonstrated by cine radiography.

Adult↗
PubMed1999

Sphincter of Oddi manometry before and after laparoscopic cholecystectomy.

BACKGROUND AND STUDY AIMS: In animal studies cholecystectomy has been found to alter the normal effect of cholecystokinin (CCK) on sphincter of Oddi (SO) function. This could be of importance with regard to the development of postcholecystectomy biliary pain. We therefore investigated the effect of laparoscopic cholecystectomy on SO motility before and after infusion with CCK. PATIENTS AND METHODS: A prospective study of SO motility, under basal conditions and during CCK (ceruletide) infusion, was carried out in eight women with uncomplicated gallstone disease, before and after laparoscopic cholecystectomy. RESULTS: Laparoscopic cholecystectomy increased common bile duct pressure (P = 0.01) and decreased the frequency of phasic contractions (P=0.05). However, the inhibitory effect of CCK was preserved as infusion of CCK was associated with a significant reduction in SO phasic amplitude and frequency, both before and after cholecystectomy. CONCLUSIONS: Following laparoscopic cholecystectomy an indisputable inhibitory effect of CCK in the SO was found. Common bile duct pressure increased and minor modifications in basal SO motility were seen.

Ceruletide↗
PubMed1996

Simultaneous lumbar and intraventricular manometry to evaluate the role and safety of lumbar puncture in raised intracranial pressure following subarachnoid haemorrhage.

We report a prospective investigation of a bedside test to evaluate the role and safety of lumbar puncture in raised intracranial pressure in patients with subarachnoid haemorrhage. Fourteen patients who underwent aneurysm clipping following subarachnoid haemorrhage were studied. All patients had intraventricular drains and needed high volume cerebrospinal fluid (CSF) drainage to maintain the normal intracranial pressure. A lumbar puncture was performed in these patients and the simultaneous opening lumbar and ventricular pressures noted, CSF was then drained via the lumbar puncture, and the simultaneous closing lumbar and ventricular pressures noted. In all patients, the opening lumbar pressure was close to the ventricular pressure. In 13 of 14 patients, CSF drainage resulted in an equivalent and simultaneous fall of ventricular pressure. We concluded that simultaneous measurement of lumbar and ventricular CSF pressure before and after lumbar CSF drainage allows identification of candidates with differential cranial and lumbar pressures and therefore indicates safety or risk of lumbar CSF drainage.

Cerebral Ventricles↗
PubMed1997

Association of midoesophageal diverticula with oesophageal motor disorders. Videofluoroscopy and manometry.

PURPOSE: To evaluate the prevalence and clinical significance of associated oesophageal motor disorders in patients with midoesophageal diverticula. MATERIAL AND METHODS: We retrospectively reviewed videofluoroscopic and, if available, manometric studies of 30 patients with midoesophageal diverticula. The type of diverticulum and the presence and nature of oesophageal motor disorders were assessed. RESULTS: Videofluoroscopy showed that 24 patients had 26 pulsion-type diverticula and 6 patients had 7 traction-type diverticula. Oesophageal motor disorders were demonstrated in 21 of the 24 patients with pulsion-type diverticula and in 3 of the 6 with traction-type diverticula. Nineteen patients had nonspecific motor disorders, 5 had achalasia, and 5 had gastrooesophageal reflux or oesophagitis. CONCLUSION: Midoesophageal diverticula are most often of the pulsion-type and tend to be associated with an oesophageal motor disorder. Motor disorders are predominantly nonspecific, but achalasia may be encountered as well.

Adult↗
PubMed2005

A novel microbubble construct for intracardiac or intravascular MR manometry: a theoretical study.

It has been demonstrated that gas-filled microbubble contrast agents, based on their volume changes, can serve as pressure probes in an MR field. It was recently reported that such an MR-based pressure measurement with microbubbles at 1.5 T must make use of microbubbles that have a volumetric magnetic susceptibility difference with the blood of at least 34 ppm in SI units. In this work, we show through analytical approximations and numerical simulations that such a microbubble formulation can be achieved by coating typical lipid-shelled microbubbles with particles of high dipole moment. Through finite-element simulations we demonstrate that the effective volumetric magnetic susceptibility of a coated microbubble is dependent on the radius, the shell volume fraction and the magnetic susceptibility of the particulates on the shell. Our calculations suggest that a suitable microbubble formulation which will be MR-sensitive to small pressure changes at 1.5 T must be 2-3 microm in radius and be uniformly coated with single-domain magnetic nanoparticles, such as magnetite, at shell volume fractions below 5%.

Arteries↗