Biomedical subjects
D Tack
Publications and source records attributed to D Tack.
[Placing of a Nitiol Memotherm prosthesis: personal experience].
The authors report their experience in the placement of a new Nitinol stent. Thirty eight stents were placed in 28 iliac arteries, 3 superficial femoral arteries, 1 popliteal artery, 2 subclavian arteries, and 2 veins of hemodialysis fistulae. The primary success rate was 100%, but several angioplasty balloons have been ruptured due to the specific configuration of the stent. The mean follow-up period was 6 months. Memotherm placement is an easy procedure, but the specific structure of the device makes the manipulation of the angioplasty balloons delicate, especially in tortuous vessels.
[Persistent left superior vena cava. Apropos of 2 cases].
Double superior vena cava with persistence of a left superior vena cava is rarely encountered. The prevalence in the general population is 0.3% but may reach 3 to 10% in patients with inborn heart diseases. There are usually no clinical signs and the malformation is usually discovered fortuitiously. We describe the features of two cases observed in our institution and reviewed the literature on the subject.
[Diagnosis of an 'apple-core' lesion in the course of a small bowel enema].
We describe a case of gallbladder carcinoma observed fortuitously during small bowel enteroclysis as an "apple-core" lesion. This case illustrates the non-specificity of the clinical manifestations as well as the usual pitfalls in the diagnostic step.
[NMR evaluation of neoplastic invasion of the pulmonary artery].
Bronchial tumors that invade the mediastinum are not necessarily inoperable. Whether surgery is possible depends, among other things, on the extent of pulmonary artery invasion. The authors have studied the value of cardiac-gated MRI and compared it with CT and venous DSA for staging tumor invasion. CT demonstrated the areas of contact between tumor and mediastinum. The MRI planes were transverse and also in the main axis of the pulmonary arteries. Twenty-one patients were studied and in 16 the findings could be checked during surgery. In all cases the findings on MRI were confirmed. In eight patients MRI provided more information than CT and DSA combined and thereby showed its superiority for evaluating arterial invasion.
[Neoplastic invasion of the pulmonary arteries. Evaluation by MRI. Preliminary experience].
Bronchial tumors invading the mediastinum are no longer systematically regarded as inoperable. Curative surgery has produced a significant survival rate and led to the adaptation of the TNM classification. The degree of invasion of the pulmonary artery is a criterion of operability. The authors are trying to assess the role of MRI with regard to CT and DSA for the measurement of invasion. Their study deals with the prospective assessment of ten patients. The MRI examinations have been carried out with a 0.5 and 1.5 T supraconductive magnet (Philips Gyroscan). Cardiac gating has been used for acquisition. The planes of section are axial, transverse or oblique along the greater axis of the pulmonary arteries. CT examinations in 9-mm thick sections with and IV contrast injection demonstrate the contact of the tumor with the mediastinum. The digital angiograms have been taken with an intravenous injection into a vein of the bend of the elbow or into a femoral vein. Six cases have been verified at surgery. In all cases, the invasion predicted with MRI proved to be correctly assessed. In three cases, MRI provides additional information to the combined findings of CT and DSA. MRI is a good complement for the preoperative assessment of patients with large tumors invading the mediastinum but for which curative surgery is indicated.