Hiatal hernia investigated by pH telemetering

Summary An esophageal probe combining a pressure-recording system and a pH-telemetering (Heidelberg) capsule is described. Advantages of the capsule over conventional pH glass electrodes are discussed. The results obtained compare favorably with previous studies using other methods to obtain simultaneous pH and pressure records. The practical value of such studies is indicated as an evaluation of surgical repair of hiatal hernia.     

The St. Jude experience

This paper covers our experience with the use of the St. Jude prosthetic heart valve from November 1979 through August 1983 in 91 patients operated on for aortic and mitral valve replacement. Nonfatal complications included hemorrhagic sequela due to anticoagulation, with an annual rate of 1 percent (1.4 percent per 100 patient years), thromboembolism with an annual rate of 0.8 percent (0.87 percent per 100 patient years), sternal infection 1 percent, operative cardiovascular accident 1 percent, and pericardial tamponade 1 percent.Operative mortality was 1 percent, early mortality (within 30 days) was 3 percent, and late mortality was 3 percent, with a total overall mortality of 7 percent. Excluding two patients who died from noncardiac causes, the overall mortality was 5 percent. The mortality rate per year was 2 percent. The survival rate 3.8 years postoperatively was 89 percent for mitral valve replacement patients and 93 percent for aortic valve replacement patients, for an overall 38 year survival rate of 92 percent. All patients were anticoagulated with warfarin. There were no instances of valve failure, replacement, or serious hemolysis. Eighty-three percent were active or working with a New York heart functional class I.In our experience, the complication rate with the St. Jude valve is as low or lower than that for any other mechanical prosthetic cardiac valve available in the world today.     

Carotid endarterectomy after Doppler ultrasonographic examination without angiography

We prospectively reviewed our experience with 32 carotid endarterectomies in 30 patients performed without angiography in a 7 year period. Although this represents 6.7 percent of our total experience with carotid endarterectomy in this period, carotid endarterectomy without angiography is increasing and comprises 17 percent of the last 2 years' total. We have adhered to strict criteria for patient selection that identifies circumstances for a safe operative experience in seven broad categories. Evidence is also presented to reduce an overriding concern for intracranial aneurysms and siphon stenosis if either one exists unrecognized. We are hopeful that in the future, the latter will be identified by intracranial Doppler studies currently being performed. Our experience in this small series has been favorable, with intraoperatively measured lesions equal to the preoperative noninvasive predictions. We suggest that Doppler ultrasonography in its current form can be effectively used in place of conventional angiography or digital subtraction angiography in selected patients.     

The middle scalene muscle and its contribution to the thoracic outlet syndrome

The predisposing anatomic alterations or features of thoracic outlet syndrome have been tallied to better define this difficult and inchoate issue. In the last 34 supraclavicular operations involving 33 patients (for a total operative experience of 128 procedures), we have found the anterior insertion of the middle scalene muscle to be present in 48 percent of our patients. This insertion, forward on the first rib, closes an already small interscalene triangle, so that the posteriorly placed brachial plexus is entrapped or irritated by the anterior edge of this muscle, which may be very sharp and firm. In addition, 10 percent of our patients had a middle scalene band intimately associated with the middle scalene muscle, often-times inseparable, for a 58 percent incidence of middle scalene involvement in the thoracic outlet syndrome. With data such as those presented herein, a more simplified operation than the heretofore popular all-out attack on the first rib may well be in the offering.     

Experiences with autotransfusion during abdominal aortic aneurysm resection

In a series of 79 elective and ruptured abdominal aortic aneurysm resections, the autotransfuser manufactured by the Bentley Laboratories was used in 50 patients. These 50 patients, in whom the average amount of autotransfused blood was 1,500 cc, required a smaller number of intra- and postoperative transfusions, maintained satisfactory recovery hematocrit levels and had an essentially unchanged platelet count throughout the first 24 hours. There was no evidence of laboratory or clinical coagulopathy. The autotransfusion equipment was set up and operated by the patients' anesthesiologists without the assistance of a perfusion technician, and proved devoid of air embolism or clotting components.Although there are many patients whose aneurysms are easily removed and grafted and who require a small number of whole blood transfusions, there still remain operative traps and pitfalls in many patients that suggest to us that the autotransfuser is a security system, and thus it is routinely set up in all cases.     

Noninvasive carotid bifurcation mapping. Its relation to carotid surgery

The carotid bifurcation can be studied accurately by a noninvasive Doppler mapping procedure. Areas of plaquing and stenosis can be located and flow patterns and alterations in velocity can be assessed equally.The technic described is valuable in many clinical settings to aid in the detection and prevention of potential stroke. It is not designed to subordinate standard cerebral angiography but to complement it. The Doppler carotid survey is easy to perform, reliable in its reproducibility, and designed to detect not only morphologic changes but also functional abnormalities of blood flow.     

Evaluation of the pH-sensitive telemetering capsule in the estimation of gastric secretory capacity

Summary A serial neutralization test to assess gastric secretory capacity using intra-gastric pH-telemetering endoradiosonde is described.Direct comparison with the augmented histamine test was made, and a very good correlation was obtained between the 2 tests.An assessment is made of the merits of the test as compared with previous methods of telemetering acid gastric secretion.Supported in part by a grant from the Department of Surgery, University of Washington, Seattle, Wash. (Dr. Stavney), and a grant from the Medical Research Council (Dr. Sircus).We would like to thank Sir John Bruce for his encouragement, and the Physicians and Surgeons of the Gastro-Intestinal Unit, Edinburgh, for the study of patients under joint care.Medintron Ltd. kindly supplied the pH-sensitive capsules and the recording apparatus used with them.