Search PubMed⌕ Search

Biomedical subjects

P Hoang

Publications and source records attributed to P Hoang.

At least 55 records · Page 3Linked to original sources
PubMed1991

Human colonic intra-epithelial lymphocytes are suppressor cells.

Human colonic intra-epithelial lymphocytes (IEL) suppress the proliferation of autologous lamina propria lymphocytes, but not autologous peripheral blood mononuclear cells, when stimulated with phytohaemagglutinin. This suppressor function is mediated by a CD8-dependent soluble factor and is not related to the expression of the gamma delta T cell receptor. These findings may be relevant to the induction of mucosal tolerance. However, there is no defect in suppressor activity of colonic IEL in inflammatory bowel disease.

Adult↗
PubMed1991

[The external fixator in unstable fractures of the distal end of the radius. Current literature review].

A recent review of the literature concerns instability of distal radius fractures and their treatment by external fixation. Redisplacement of distal radius fractures most often occurs chronically, and the severity can be predicted by initial deformity, axial shortening and dorsal comminution of the radius. The need for an anatomical reduction of these fractures is emphasized by different clinical and biomechanical studies. For many authors, external fixation provides good to excellent results in more than 75% of cases, both clinically and anatomically. Most of the complications are benign and do not affect long-term results. This study also discusses the different techniques and the best indications for external fixation.

External Fixators↗
PubMed1989

[Severe cardiac decompensation: value in the early hours of a combination of amrinone and dobutamine].

Ten patients with severe chronic heart failure (class III and IV of the NYHA classification) received treatment for severe heart failure with dobutamine (10, then 15 micrograms.kg-1.min-1), then with dobutamine combined with amrinone (7.5, then 10 micrograms.kg-1.min of each). Used alone, dobutamine improves cardiac performance (cardiac index from 1.8 +/- 0.24 l.min-1.m-2 to 2.65 +/- 0.44 l.min-1.m-2). These results are further improved when amrinone is associated with dobutamine. Blood pressure increases with dobutamine and no decrease is recorded when amrinone is introduced, despite a gradual decrease in systemic arterial resistances. Pulmonary artery wedge pressure shows a significant decrease only when the strongest dose of the combined drugs is used. However, this positive effect is counterbalanced by an increase in pulse frequency. Side effects, be it on the blood count (platelets count reduced from 255,600 +/- 3974 mm-3 to 207,400 +/- 3380 mm-3 with no clinic sign) or cardiovascular activity (one case of premature ventricular contraction; one case of transient junctional rhythm), do not require the suspension of treatment. Thus, the dobutamine-amrinone combination treatment seems a promising one.

Aged↗
PubMed1987

[Thoracic wounds. Therapeutic approach. Apropos of 77 cases].

We have led over a four year period, from 1981 to 1985, a prospective study on all cases of penetrating chest wounds (77 cases) in the intensive Care unit and the Department of Thoracic Surgery at the Avicenne Hospital. These wounds, involving young males, are fortunately mostly benign. Their seriousness is based on the abdominal or mediastinal hemorrhage as well as lesions to the vital organs which need an emergency intervention. The latter, nevertheless, with the help of the mobile reanimation service for transfering the patient, has diminished the mortality rate to 2.6 per cent. Following their experiment and after a review of the literature, the authors expose their method of management of the penetrating chest wounds.

Adult↗
PubMed1986

Joint reconstruction following trauma: comparison of microsurgical transfer and conventional methods: a report of 61 cases.

Joint reconstruction at the metacarpophalangeal or proximal interphalangeal levels remains a difficult problem in hand surgery. The authors reviewed sixty-one joints reconstructed acutely or electively allowing to compare Swanson spacer (30 joints), interpositional arthroplasty (4), non vascularized joint transfer (5) and vascularized joint transfer (21). Among these, two different techniques have been used: island compound transfer from a finger bank (10) and free vascularized transfer from the second toe (10) or from a non replantable finger (1). It is not worth while comparing different techniques applied to different indications. The only point which can be stressed is the better average range of movement of metacarpophalangeal reconstruction compared to that obtained at the proximal interphalangeal level.

Arthroplasty↗
PubMed1986

Post mastectomy pain after brachial plexus palsy: metastases or radiation neuritis?

Three patients have been reported who developed metastatic tumour within the neural tissue of the brachial plexus three years, four years and fourteen years respectively after treatment of breast carcinoma by simple mastectomy and postoperative radiotherapy. A fourth patient who developed bilateral upper limb paralysis after radiotherapy for a lymphoma is also reported. At exploration of the brachial plexus extensive fibrosis was present in all cases with metastases only diagnosed through biopsy of neural tissue. The clinical features and the role of surgery are discussed in the light of our experience and a review of available literature.

Adult↗
PubMed1985

Technique and indications of the forearm flap in hand surgery. A report of thirty-three cases.

The Chinese forearm flap is vascularized by the radial artery and may be used as an island or a free flap. Used as an island flap, the pitfalls of the microsurgical procedures required for a free flap, may be avoided. Vascular anastomosis is easily performed owing to the large diameter of the vessel. The possibility of using it as a composite flap with fascia, tendons, muscle, bone or nerve makes this flap a "must" in reconstructive surgery of the hand. A series of 33 cases was reviewed in an attempt to summarize their indications and contraindications respectively.

Adolescent↗