ABSTRACT
Objective The aim of this study was to explore the effects of volume controlled ventilation (VCV),pressure controlled ventilation(PCV)and pressure controlled ventilation-volume guaranteed (PCV-VG)on respiration and circulation in elderly patients undergoing thoracic surgery. Methods Thirty-six elderly patients who underwent thoracic surgery were enrolled in our study. Patients were divided into VCV,PCV and PCV-VG groups according to randomized design. The hemodynamic and respiratory data and the arterial blood gases had been recorded in the pre-operation,20 min,40 min,60 min after OLV and 20 min after the resumption of two lung ventilation. Results Compared with VCV group,Ppeak value was significantly lower in PCV and PCV-VG groups(P 0.05). Conclusion Compared with VCV,the use of PCV and PCV-VG have significant advantages in the operative oxygenation and airway pressure for elderly patients undergoing OLV.
ABSTRACT
Objective To evaluate the ultrasound(US) features of diffuse sclerosing variant (DSV) of papillary carcinoma of the thyroid. Methods The US and histopathlogical of 20 DSV patients were retrospectively assessed. Results Among the 20 cases,thyroid single lobe of 12 cases,bilateral lobes of 8 cases and cervical lymph nodes metastases of 18 cases (90%) were involved in DSV of papillary carcinoma of the thyroid. At ultrasound, echo diffuse abnormal change of single lobe or bilateral lobes of thyroid and diffuse scattered microcalcifications were seen in the DSV of papillary carcinoma of the thyroid. The blood flow signals of the abnormal lobes were occupied by 75% of one grade and 25 % of two grades. Conclusions DSV of papillary carcinoma of the thyroid is usually manifested as echo diffuse abnormal change,diffuse scattered microcalcifications and cervical lymphocytic infiltration on ultrasound in relatively young patients.