Using a 12MHz high-frequency probe can find calcification points less than 1mm in the blood vessel,
It has a good diagnostic value for carotid arteriosclerosis obliterans. Local magnification of blood flow exploration can also be used to determine the degree of lumen stenosis, whether the emboli may fall off, whether there is an ulcer, and prevent cerebral embolism.
Color Doppler ultrasound is the best diagnostic method for all types of arteriovenous fistulas. The diagnosis can be confirmed when the multicolored inlaid ring color spectrum is detected.
For carotid body tumors, major abdominal aneurysms, vasculitis obliterans, and chronic venous diseases of the lower extremities (including varicose veins of the lower extremities, the original deep venous valve insufficiency of the lower extremities, deep venous return disorders of the lower extremities, thrombophlebitis and venous thrombosis Formation) The use of color Doppler ultrasound's high-definition, local magnification and blood flow spectrum detection can make a more accurate diagnosis.
Folding abdominal organs
It is mainly used in liver and kidney, but it has certain auxiliary diagnostic value for the differentiation of benign and malignant lesions in the abdominal cavity, the differentiation of gallbladder cancer and large polyps, the differentiation of chronic and severe inflammation, the difference between common bile duct and hepatic artery.
For liver cirrhosis, color Doppler ultrasound can make better judgments from the size of the lumen of various blood vessels in the liver, the speed of the internal flow rate, the direction and the establishment of collateral circulation. For nodular sclerosis and diffuse liver cancer that are super difficult to distinguish between black and white, it can be beneficial to high-frequency exploration and blood flow spectrum exploration to make a differential diagnosis.
For the identification of benign and malignant lesions in the liver, the differential diagnosis of cysts and various arteriovenous tumors has better diagnostic value. Primary liver cancer and secondary liver cancer can also be distinguished by internal blood supply.
Color Doppler ultrasound is mainly used for renal vascular disease, such as renal arteriovenous fistula as mentioned above. When the clinical manifestation is intermittent, painless hematuria, the cause cannot be found, there are strong indications. For one of the common causes of secondary hypertension, renal artery stenosis, color Doppler ultrasound can basically make a clear diagnosis. When the blood flow velocity in the stenosis is greater than 150 cm/s, the diagnostic accuracy is 98.6%, and the sensitivity is 100. %. On the other hand, it is also the differential diagnosis of renal cancer, transitional renal pelvis cancer and benign tumors.
Folded heart
Real-time volume imaging is used to visually display complex cardiac anatomical structures, accurately evaluate cardiac function, and obtain multi-directional two-dimensional views, which can provide important imaging information for cardiology, cardiology, anesthesiology, catheterization, etc. . Accurate three-dimensional images of mitral valve structure, blood, and spatial anatomy can be obtained, providing intuitive information for surgical repair operations, and evaluating the effect of interventional treatment.
The Siemens color Doppler ultrasound system provides a professional cardiac ultrasound solution. Its probe can enter the left and right heart systems to observe the heart structure. The image resolution and clarity are high. It can check the heart structure and radiofrequency ablation. Positioning, knowing about cardiac interventional therapy, and evaluating the effect of intraoperative monitoring of surgery are of great value.
Folding small organs
Among the small organs, color Doppler ultrasound has obvious diagnostic accuracy compared with black and white ultrasound. The main ones are the thyroid, breast, and eyeball. The diagnosis and differential diagnosis of lesions are mainly based on the blood supply of the thyroid gland. Hyperthyroidism images are the most typical and specific, which is a "fire sea sign". In simple goiter, there is no significant change compared with normal thyroid blood supply. Subacute thyroiditis, Hashimoto’s thyroiditis is between the two, it can be distinguished, and nodular goiter, thyroid adenoma and thyroid cancer can be distinguished by the nodule and surrounding blood flow. Therefore, it is recommended that the diagnosis of thyroid is not clear, and patients who have a certain financial ability can do color Doppler ultrasound to further confirm the diagnosis.
Breast color Doppler ultrasound is mainly used for the differential diagnosis of breast fibroids and breast cancer, while the eyeball has better diagnostic value for ocular vascular diseases.
Fold the prostate and seminal vesicles
It is precisely because rectal exploration is currently the best method for diagnosing the prostate, it is specifically proposed here.
In this method, the prostate is divided into the transition zone, the central zone, the peripheral zone, and the other part of the prostate fibromuscular matrix zone.
The transition zone includes both sides of the sphincter around the urethra and the abdomen. It is the birthplace of 100% of benign prostatic hyperplasia, while the transition zone in normal people only accounts for 5% of the size of the prostate.
The central area is around the ejaculatory duct and the apical wall points to the fine caruncle. The surrounding area includes the posterior part of the prostate and the apical parts on both sides, which is the birthplace of 70-80% of the cancer. The apical capsule even disappears, forming an anatomical weak area. It is a common metastasis channel for cancer and a key area for prostate biopsy. Rectal exploration has a good diagnostic value for various prostate seminal vesicle gland diseases. When combined with prostate biopsy, the diagnosis can basically be clear.
The incidence of prostate diseases, especially prostate cancer, is on the rise in my country. The incidence of prostate cancer in European and American countries even ranks behind lung cancer. It is the second most common cancer, and the prostate can not be diagnosed by abdominal exploration. Therefore, it is recommended to use rectal ultrasound to diagnose prostate disease in clinical practice. You can use the rectum to explore, you don't need to explore the abdomen.
Obstetrics and Gynecology
The main advantages of color Doppler ultrasound in obstetrics and gynecology are the identification of benign and malignant tumors and the evaluation of umbilical cord diseases, fetal congenital heart disease and placental function. It has better auxiliary diagnostic value for trophoblastic diseases. It is used to observe infertility and pelvic varicose through blood flow spectrum , It can also make a diagnosis that is super difficult in black and white. The use of vaginal probes has certain advantages over abdominal exploration.
