Ultrasonic testing of reactive powder concrete.

Concrete is a critical material for the construction of infrastructure facilities throughout the world. Traditional concretes consist of cement paste and aggregates ranging in size from 6 to 25 mm that form a heterogeneous material with substantial compressive strength and a very low tensile strength. Steel reinforcement is used to provide tensile strength for reinforced concrete structures and as a composite the material is useful for structural applications.

Duodenal diversion with vagotomy and antrectomy for severe or recurrent reflux oesophagitis and stricture: an alternative to operation at the hiatus.

In cases of mild symptomatic gastro-oesophageal reflux, standard antireflux surgery, such as fundoplication or the Angelchik prosthesis, produces satisfactory results. Duodenal diversion is recommended for use only in patients with severe oesophageal damage. This situation commonly arises where the gastro-oesophageal junction cannot be reduced into the abdomen, or where previous surgery has made reoperation at the hiatus difficult and hazardous.

Randomized prospective trial of Roux-en-Y duodenal diversion versus fundoplication for severe reflux oesophagitis.

It is not widely recognized that duodenal contents are implicated in the causation of severe reflux oesophagitis and stricture formation in patients with hiatus hernia. In a randomized prospective trial, including only patients with severe oesophageal changes, standard Nissen fundoplication has been compared with antrectomy and Roux-en-Y reconstruction. Twenty-two patients were randomized to each group.

Clinical evaluation of Tc-99m N,N'-bis(mercaptoacetyl)-2,3-diaminopropanoate as a replacement for I-131 hippurate: concise communication.

A clinical comparison of Tc-99m N,N'-bis( mercaptoacetyl )-2,3- diaminopropanoate (Component A) (Tc-99m CO2-DADS-A) and I-131 hippurate was conducted in a series of five normal volunteers and 18 patients. Each subject was studied in one session with Tc-99m CO2-DADS-A and I-131-hippurate; digital and analog images were recorded for 30 min and after voiding. In the normal volunteers, digital images with Tc-99m CO2-DADS-A gave a kidney-to-background ratio at 3 min that was greater relative to I-131 hippurate, a leading-edge parenchymal transit time that was similar to I-131 hippurate, and a percent injected dose in the urine at 30 min that was slightly less than I-131 hippurate (p less than 0.

Causes of death after kidney transplantation.

During the five-year period September 1974 through August 1979, two hundred nine consecutive patients received their first kidney transplant in Denver. During 2.5 to 7.

Carcinoembryonic antigen: usefulness as a postsurgical method in the detection of recurrence in Dukes stages B2 and C colorectal cancers.

Sequential carcinoembryonic antigen (CEA) plasma levels were obtained postoperatively in 181 patients with colorectal Dukes stages B2 and C colorectal cancers to assess their usefulness as part of a follow-up program designed to detect disease progression. In all, 1,684 determinations were obtained in patients who were, at the time, free of any clinical or radiologic evidence of disease. If individual CEA determinations are considered and if 10 ng/ml is specified as the limit between normal and elevated CEA levels, both sensitivity (45.