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M C Plainfosse

Publications and source records attributed to M C Plainfosse.

At least 37 records · Page 2Linked to original sources
PubMed1986

Repetitive echoes in ultrasonography of the diaphragm demonstrated by cadaver studies.

For some years past, strange and seemingly inexplicable images frequently appear during sonographic examination of the area below the diaphragm. In order to explain these mysterious phenomena we carried out anatomical experiments. We observed the appearance of such enigmatic images no matter what the kind of probe was used and found that in every case the appearance of a phantom image over the diaphragm signifies the existence of a true image situated elsewhere. It is always possible with necessary adjustments to locate the formation responsible for the phantom images, which are no longer mysterious.

Diaphragm↗
PubMed1986

[Should colonic anastomoses be inspected radiologically?].

Routine early radiologic review examinations were conducted in 100 patients after colocolic or colorectal anastomosis. Postoperative course was assessed as clinically uncomplicated in 77 cases, a barium enema producing normal images in 67 and abnormal images in 10 cases, and recovery operations were not necessary. The course was more difficult in 23 patients: recovery operation to repair a gap was needed in 9 cases, while results were evaluated as satisfactory in 14 with 3 false negatives. Recovery operations (including 6 for fistula) in 9 patients followed acute clinical manifestations. Clinical evaluation is therefore of primary importance, a barium meal being justified only when intra-abdominal complications are suspected, while recognizing the risk of false negative results for this examination.

Aged↗
PubMed1985

Correlations between radiography, ultrasonography, computed tomography and pathologic findings in prostatic disease.

A total of 20 macroscopically normal or hypertropic prostates were taken from cadavers of men older than fifty, who died of causes other than urologic ones. The samples were studied in vitro by nonscreen x-ray films, ultrasonography, computed tomography, and then by a pathologist. There were 4 normal prostates, 12 with benign prostatic hypertrophy, 3 with carcinoma, and 1 with prostatitis. Conventional radiography which showed only prostatic calcifications was of no pathologic interest. Computed tomography is by no means of diagnostic use in distinguishing between benign prostatic hypertrophy and carcinoma, and should be used only as an alternative in the evaluation of regional extension of prostatic carcinoma. On the other hand, ultrasonography appears to be sensitive to detection of very small nonpalpable nodules. However, its specificity is poor and its use should be restricted as a guide in obtaining biopsy specimens or as a means of evaluating tumor volume.

Aged↗
PubMed1985

[Peroperative ultrasonics in excision of renal and ureteral calculi by the surgical approach. Apropos of 30 cases].

Ultrasound imaging was conducted in 30 patients during operation for removal of renal and ureteral stones, in most cases after contact radiography with small sterile films, and in all cases before opening the renal pelvis to avoid penetration of an air bubble into the intrarenal excretory tract. Each bubble may, because of its weak acoustic impedance, provoke total reflection of the waves simulating the image of a stone. Ultrasound provides data on cortical projection of calculi, the thickness of the parenchyma and the echoless avascular zones. All complex calculi (from Staghorn to caliceal types) should be investigated by ultrasound since it allows economy of time and reduced risks of excision of calculi. All stones greater than 1 mm give a hyperechogenic image with a cone shadow, the only differential diagnoses being air bubbles and intraparenchymatous calcification. Nonrecognition of calculi 1 mm in diameter is acceptable insofar as this type of caliceal or pyelic calculus may be excreted spontaneously. Ultrasound imaging during operation provides marked economy in time, of particular value during nephrotomy with pedicle clamping. Time is saved as a result of the three-dimensional detection of stones. Results in 30 cases showed a sensitivity of 97% for the method with excellent specificity, with only one false negative (residual microlithiasis) and one false positive (air bubble).

Humans↗
PubMed1984

Intraoperative localization of renal calculi by real-time ultrasonography.

Experimental and intraoperative experiences in ultrasonographic localization of calculi are reported. With a small high-resolution real-time probe, we localized 1-mm calculi introduced in ex situ cadaver kidneys. During 13 operations all calculi of various sizes and nature were localized 11 times. This method seems to have many advantages: it is easy to use, it localizes calcific and noncalcific small calculi bidimensionally, and it shortens operative time.

Adult↗
PubMed1983

165 renal carcinomas: accuracy of imaging for diagnosis and spread--cost efficiency.

Based on a study of 165 cases of renal carcinoma, we compare the relative diagnosis efficiency of different methods: intravenous urography (IVU), ultrasound (U.S.), arteriography and computed tomography (C.T.). Our evidence enables us to assert the excellent diagnostic accuracy of ultrasound and the superiority of computed tomography for good staging of renal carcinoma. The cost efficient methods for the evaluation of this tumour are intravenous urography (to show and localize the renal mass), ultrasound (to assert the echogenic structure) and computed tomography (to establish the diagnosis of carcinoma and judge its spread).

Angiography↗
PubMed1982

[Echocardiography in the diagnosis of diseases of the pericardium (author's transl)].

Echocardiography is a reliable, non-invasive and inexpensive tool for initial diagnosis and for evaluating the course of various cardiopathies. It was first used in diagnosis of pericardial effusion which is still one of it's best indications. Demonstration of an echo-free area behind the posterior wall of the left ventricle, bordered by dense echoes from the pericardium and remaining visible when the transducer is lowered, lead to the diagnosis of pericardial effusion and to quantification of the amount of fluid. The secondary effects can be assessed by analysis of parietal and valvular motion.

Diagnosis, Differential↗
PubMed1979

[Echographic study of thoracic lumps in 9 operated cases (author's transl)].

The authors report 9 cases of thoracic lumps investigated by echography in children and adults and operated later. The ulta-sonic study of intra-thoracic lumps is possible thanks to the echographic "windows" which are described; mediastinal and parenchymal lumps can thereby be investigated provided that they have a direct contact point with the chest wall. The echographic examination cannot reveal the histological nature of the lump but it is interesting in that in case of a liquid content it can assert its benignity, all with a technique simple and easy to use especially in children. The reliability of this examination seems good, the echostructure of the lesion being correctly defined in the 9 cases and in the 14 observations in the literature which are summed up.

Adult↗
PubMed1977

[Critical study of echocardiography in mitral cardiopathies].

The importance of the echocardiogram in a study of mitral disorders has been analysed by examining 107 echocardiograms set against a clinical examination, an investigation of haemodynamic function (57), left-sided angiography (42), and/or examination at the time of operation (40). This study confirms the great diagnostic value of the echocardiographic findings in mitral stenosis (56 patients): the amplitude DE, the slope EF, the percentage of mid-diastolic closure, the echo from the valves, and the dimension of the left atria (P less than 0.001). This association remains valid if there is mitral incomptence as well as stenosis, or if there is also an aortic lesion, provided all the parameters are used. The degree of stenosis of the mitral orifice cannot be determined with sufficient certainty to allow surgical exploration to be undertaken solely on echocardiographic results, however the patients are selected (sinus rhythm, absence of calcification, mobile valve...). The echocardiographic diagnosis of the 17 cases of mitral incompetence was incomplete (except for rupture of the chords); the volume of the regurgitation is poorly appreciated.

Cardiac Output↗