声波如何"透视"人体 很多人好奇,超声成像既无CT、X线的电离辐射,也无核磁共振的强大磁场,何以能清晰呈现人体内部结 构?其实,超声检查的原理并不复杂,核心是利用超声波的反射与折射特性。超声波是频率高于20000赫兹 超声检查的"工作原理": 在现代医学诊疗体系中,超声检查凭借其无创、无辐射、实时成像、价格亲民等独特优势,成为临床诊断 中不可或缺的"利器"。从胎儿发育监测到老年病筛查,从急诊外伤评估到慢性病随访,超声技术如同一位 精准的"健康侦察兵",借助无形的声波,为医生勾勒出人体内部的生理与病理图景。作为从事超声诊断工 作数十年的医者,我常遇到患者对超声检查存在诸多疑问,今天便结合临床经验,带大家走进超声检查的世 界,揭开它的神秘面纱。 的声波,超出人类听觉范围,却能穿透人体软组织。当超声波发射到人体后,会在不同密度的组织界面发生 反射,比如皮肤与肌肉、肌肉与脏器、正常组织与病变组织之间,反射回来的声波信号被仪器接收后,经计 算机处理转化为实时的图像,医生便可以通过图像观察组织器官的形态、大小、结构及血流情况,判断是 否存在异常。 与CT、核磁共振(MRI)等检查相比,超声检查独具显著优势:其一,无创无辐 ...

Core Viewpoint - Breast cancer is the most common malignant tumor among women globally, with an increasing incidence rate, approximately 2.3 million new cases reported annually according to the World Health Organization [1] Group 1: Incidence and Demographics - The incidence of breast cancer is rising both globally and in China, with a notable increase in younger patients [3] - Breast cancer typically occurs more frequently in women around the ages of 55 to 60, with a secondary peak in women around 40 years old [3] - Younger breast cancer patients tend to experience faster disease progression and a higher likelihood of lymph node metastasis [3] Group 2: Symptoms and Self-Examination - The primary symptom of breast cancer is a breast lump, with about 80% of patients presenting with this symptom at diagnosis [5] - Most early-stage breast cancer patients do not exhibit obvious symptoms, making regular self-examination crucial [5] - Recommended self-examination frequency is once every one to two months, including visual checks for skin changes and nipple discharge [7] Group 3: Screening and Diagnosis - Due to the uncertainty of self-examinations, regular hospital screenings are essential, including ultrasound, mammography, MRI, and ductoscopy [9] - Early-stage breast cancer often presents with calcifications that are difficult to detect via ultrasound, necessitating mammography for accurate diagnosis [9] - It is advised that women over 40 undergo mammography screenings every one to two years, especially if abnormalities are detected on X-rays [11]

Core Viewpoint - Breast cancer is a significant health threat to women in China, with a rising incidence rate, necessitating earlier screening for high-risk individuals [1][2][3] Group 1: Breast Cancer Statistics and Risk Factors - In 2022, there were 357,200 new breast cancer cases in China, accounting for 15.6% of all new cancer cases [1] - Family history, particularly if a direct relative was diagnosed with breast cancer before the age of 50, significantly increases individual risk and warrants earlier screening [1][2] Group 2: Screening Recommendations - For women under 40, especially those with high-risk factors (e.g., family history, breast hyperplasia), ultrasound is recommended due to its safety and accessibility [2] - Women over 40 should consider a combined screening approach using mammography and ultrasound to improve detection rates, particularly for microcalcifications [2] - High-risk individuals should undergo personalized management based on specific risk factors, including reproductive history and lifestyle choices [2] Group 3: Importance of Early Detection - Early detection can lead to a nearly 90% five-year survival rate for breast cancer, compared to less than 30% for late-stage diagnoses [3] - Young women should not ignore symptoms such as breast lumps or unusual skin changes, as early intervention is crucial regardless of age [3]

Core Viewpoint - Breast cancer is a significant health threat to women in China, but advancements in medical treatment have improved the 5-year survival rate to 83.2% [1] Group 1: Current Situation and Statistics - Approximately 72% of breast cancer patients in China are diagnosed at an early stage, yet 30% of high-risk patients may experience recurrence within the first few years [1] - The 5-year survival rate for late-stage breast cancer is only 20%, with a median survival time of 2-3 years [1] Group 2: Genetic Factors and Risk Assessment - 5%-10% of breast cancer patients have hereditary breast cancer due to genetic mutations, with BRCA1/2 being the most critical susceptibility genes [2] - 5%-20% of breast cancer patients in China carry BRCA mutations, which are more common in HER2-negative breast cancer, particularly in triple-negative breast cancer (TNBC) [2] Group 3: Importance of Genetic Testing - Genetic testing for BRCA1/2 is recommended for patients with a family history of breast cancer and those diagnosed with invasive TNBC, especially with lymph node involvement [3] - Accurate diagnosis through genetic testing is essential for developing personalized treatment plans and improving treatment efficacy [3] Group 4: Treatment and Prevention Strategies - New treatment options based on genetic mutations require clear identification of the mutation-carrying population for effective outcomes [4] - Regular breast cancer screenings are advised for women aged 35 to 70, along with self-examinations to facilitate early detection and treatment [4]

Core Viewpoint - Guangdong Province's Medical Insurance Bureau has announced the optimization and integration of medical service pricing for dialysis, ultrasound, and traditional Chinese medicine, ensuring that the financial burden on dialysis patients does not increase [1][2]. Group 1: Dialysis Service Pricing - The previous 32 items related to "machine-assisted plasma exchange" have been consolidated into 21 items under "blood dialysis fees," with a provincial maximum price set at 390 yuan per session, covering all necessary procedures and resources [2]. - The maximum price for peritoneal dialysis (manual) is set at 45 yuan per session, while automated peritoneal dialysis is priced at 16 yuan per hour [2]. - Public medical institutions must charge according to the integrated pricing for dialysis services and cannot charge separately for different components of the service [2][3]. Group 2: Traditional Chinese Medicine and Ultrasound Pricing - The previous 60 items for "ordinary acupuncture" have been consolidated into 10 pricing items for acupuncture methods, while 105 items for "fracture manual reduction" have been reduced to 9 items for orthopedic methods [4]. - The pricing for ultrasound services has been streamlined from 84 items to 13, with ultrasound report services now included in the ultrasound pricing, eliminating separate charges for reports [4]. - The maximum prices for the newly integrated services must not exceed the provincial limits, with local prices allowed to be lower [4].