View clinical trials related to Diagnosis.
Filter by:This study is testing a way to diagnose endometriosis using a uterine tissue biopsy (similar to a pap smear) as opposed to undergoing laparoscopy surgery. The tissue is sent to lab for cellular analysis with a proprietary AI (artificial intelligence) technology.
ACNES is a neuropathic pain condition of the abdominal wall. It is a clinical diagnosis based on patient's history and physical examination. No diagnostic test is available to confirm the diagnosis. This pilot study will determine if skin biopsies can be used as diagnostic test. Two 3mm biopsies will be taken and used to count the small nerve fibres in the skin. The number of small nerve fibres of the painful skin will be compared to non-painful skin. Skin biopsy and small fibre nerve count is already used as diagnostic test in patients with small-fibre neuropathy. The investigators hypothesize that patients with ACNES will have a reduced number of small nerve fibres in the affected skin, compared to the non-affected skin.
The investigators aim to study the rate of developing a biopsy-based diagnosis of high-grade dysplasia (HGD) and EAC in BE patients in a prospective cohort of 208 BE patients at high risk of progression (i.e. after endoscopic removal of visible lesions containing HGD/EAC and/or a diagnosis of low-grade dysplasia (LGD)) as well as in 208 BE patients with a nondysplastic BE (NDBE) undergoing standard BE surveillance. In these patients the investigators will combine biopsy sampling with WATS at baseline and all follow-up endoscopies during a 3- year follow-up period. This will allow us to study the natural history of WATS-positive-biopsynegative- cases and of WATS-specific outcomes such as basal-crypt dysplasia. The study also allows us to collect specimens for future biomarker studies that may help to predict progression to HGD/EAC in the absence of morphological features of dysplasia.
To evaluate the sensitivity and specificity of the combined detection system for the diagnosis of pneumocystis infection in immunocompromised population in Southern China.
Lung cancer is a leading cause of cancer death worldwide. Early diagnosis is linked to a better prognosis. Further, surgical resection at the early stages of non-small cell lung cancer (NSCLC) results in markedly improved survival rates. Computed tomography (CT)- or bronchoscopy-guided needle biopsies are standard definitive diagnostic procedures for lung cancer and are used to obtain tissue for pathological examination. However, these procedures are invasive, difficult to repeat, expensive, and risk exposure to radiation. Conversely, liquid biopsies, such as circulating tumor cells (CTCs), circulating tumor DNA (ctDNA), and extracellular vesicles (EVs), are simple and less invasive procedures that can be repeated more frequently than tissue biopsies. This study is a retrospective blood sample obtained and prospectively comparative analysis of various biomarkers (cancer markers, and exosome markers) derived from peripheral blood and pulmonary venous blood from patients who underwent lung cancer surgery. And treatment monitoring using biomarkers compare with peripheral and pulmonary blood.
Trap neuropathies; They are compression neuropathies that occur as a result of peripheral nerves being compressed for various reasons along their anatomical paths. Although each nerve has areas suitable for anatomical entrapment, compression can occur at any point along the nerve. Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy caused by compression of the median nerve at the wrist level. Its prevalence in the general population is 2.5-11%. Although the majority of cases are idiopathic, it may also occur secondary to pathologies such as pregnancy, diabetes mellitus, thyroid dysfunction, arthritis, wrist fractures and acromegaly or occupation. The diagnosis of CTS is made clinically, but the best method for definitive diagnosis is electrophysiological examination. Some anthropometric measurements that may be associated with CTS were made and their effect on the risk of CTS was investigated. In a study conducted by Sabry et al. in 2009, it was reported that there may be a relationship between BMI, wrist ratio (ratio of wrist depth to width) and wrist-palm ratio (ratio of wrist depth to palm length) and CTS risk. In a study by Lim et al. in 2008, it was reported that the critical value for wrist ratio was 0.70 and above. However, there were no studies reporting how many percent predictors of anthropometric measurements according to the severity of CTS.
The majority of the burden of periodontal diseases in the population remain undetected. Self-detection and confirmation with simple, non-clinical tests may improve early case detection and access to the needed level of care. A recently conducted study has indicated that self-reported signs and symptoms through questionnaires and gingival bleeding on brushing (GBoB), in particular, are potentially useful approaches to detect gingival inflammation and other signs of periodontal health and disease. A parallel study evaluated the accuracy of the presence of elevated levels of activated matrix metalloproteinase-8 (MMP-8). A strategy combining specific questions, subject demographics, GBoB and aMMP-8 has shown promise for screening and diagnosis of periodontal health and disease. Validation of a diagnostic approach requires assessment in a first population (development group) and confirmation in an independent one.
Currently, transvaginal cervical length measurement is used to screen in asymptomatic pregnant women with a history of PTB. In symptomatic women, presenting with threatened PTB cervical length in combination with the fibronectin test is used to identify women at high risk to deliver preterm. However, the predictive capacity of transvaginal cervical length measurement is limited. In pregnant women with a history of PTB, it only identifies a proportion of women who will have recurrent PTB. For symptomatic women, 30-60% of these women admitted to the hospital, do not deliver within seven days, leading to overtreatment of these women. Cervical softening is precursor of cervical shortening, effacement and dilatation and therefore cervical softening is a promising new marker that is based on tissue elasticity. However, the predictive value of cervical softening and the relation with spontaneous PTB still has to be determined. With the newly developed Pregnolia® System cervical softness could be measured on a standardized and safe manner. This study could help to improve care for women with a history of spontaneous PTB.
Transbronchial cryobiopsy under the guidance of endobronchial ultrasound is performed in patients with pulmonary peripheral nodule, and assess the diagnostic yield and safety.
The aim of this study is to prospectively validate the safety and efficiency of management according to the YEARS algorithm to safely rule out clinically suspected PE in patients with active malignancy to be compared with 'standard' management by computed tomography pulmonary angiography (CTPA) alone in a randomized study.