RESUMEN
Objective To develop an embedded system by using time-triggered system and ATmega128.Methods Making use of the minimum system structure of ATmega128,a multitask system,which could be implanted into AVR CPU,was designed based on the singlechip with 8 bits and 51series.Results Time-Triggered Embedded System kept the controlling precision on ms degree and ensured a sensitive and rapid response to keyboard input.Conclusion Software designed by Time-Triggered Embedded System has advantage in real time,so it is applicable to minitype real time control system.
RESUMEN
Objective To study the diagnosis and treatment for the syndrome of inappropriate antidiuretic hormone secretion in neurosurgery.Methods Retrospective analyze clinical situation, treatment, and process of final diagnosis in 6 SIADH cases.Result Diagnosis of SIADH and differential diagnosis with CSWS is very difficult.In clinic the experimental therapy of restricting water and natrium is a important method of differential diagnosis,but also a effective therapy.Conclusion Speciality of SIADH is (1)hyponatremia(Na +≤128 mmol/L),natriuresis(Na +≥80 mmol/24h),(2)ADH assay is no significant for SIADH and CSWS,(3)no hypervolemia and edema exhibition,(4)restrict water is effective in treatment.
RESUMEN
Objective To study the diagnosis and treatment of the inappropriate antidiuretic hormone secretion(SIADH) syndrome after cerebral injury. Methods A retrospective analysis was conducted on 12 patients suffered from SIADH after cerebral injury. The clinical features were similar to common hyponatremia, no specific manifestation. Most of the hyponatremia were detected by routine examination. The first of all,sodium losing in these patients with hyponatremia was routine supplied according the amont of true salt losing.If natremia was not raised or still more descended 2～3 days after treatment, and amount of supplying salt was correspond to that of natriuresis, SIADH should be considered,using restricting water therapy,substituted for salt supplement.furosemide plus albumin were the first choice for dehydration therapy. Results 24～48h after restricting water and natrium, 12 patient's natremia level was back up in different degree. Except for 2 death whose natremia was not corrected completely, 8 patient's natremia was corrected completely in 1 week, 1 patient's in 14 days, and 1 in 3 months after injury. Conclusions Diagnosis of SIADH is very difficult before treatment, but effective treatment can be obtained if we adopt correcting strategy. In these patients, the diagnosis of SIADH was confirmed with the course of treatment,we call it as therapeutic diagnosis.