Blind source separation technique based on independent component analysis (ICA) can separate blood volume pulse (BVP) from the facial video and then realize the telemetry of heart rate, blood oxygen saturation, respiratory rate and other vital signs parameters. However, the superiority of ICA in BVP extraction has not been demonstrated in the existing researches. Some researchers suggested using traditional G-channel method for BVP extraction (G-BVP) instead of ICA method (ICA-BVP). This study investigated the applicability of ICA-BVP comparatively. To solve the inherent permutation problem of ICA, a spectral kurtosis-based method was proposed for BVP identification. The experimental results based on the facial video datasets from 9 subjects shows that ICA-BVP method has apparent advantages in motion artifacts attenuation and ambient light changes elimination. The kurtosis-based method achieved a good performance in BVP identification and dynamic heart rate (HR) estimation. In practical application, the proposed ICA-BVP method could present a better stability and accuracy in vital signs parameters extraction.
ObjectiveTo analyse the quality of implementation in clinical application guidelines of the Chinese patent medicines for the treatment of common diseases. MethodsWe retrieved clinical application guidelines of the Chinese patent medicines for the treatment of common diseases published from February, 2019 to August, 2022 in databases. The clinical practice guideline (CPG) implementation evaluation tool was used to evaluate the implementation of the included guidelines. ResultsA total of 29 guidelines were included. The implementation quality of included guidelines was moderate. Thirteen (44.8%) were high quality and 16 (55.2%) were moderate quality. ConclusionThe quality of implementation of clinical application guidelines of the Chinese patent medicines for the treatment of common diseases is higher than that of other traditional Chinese medicine CPG. The CPG implementation evaluation tool can be used in traditional Chinese medicine CPGs and particularity of TCM should also be considered.
Objective To investigate inter-observer reproducibility in the pathologic diagnosis of breast intraductal proliferative lesions (BDPL). Methods Forty three BDPL patients were diagnosed by criterion of Page. Every specimen from each case was sorted randomly. All slides were classified as mild usual hyperplasia, moderate-severe usual hyperplasia, mild atypical hyperplasia, moderate-severe atypical hyperplasia, ductal carcinoma in situ, or ductal carcinoma in situ with invasion. Inter-observer agreement of the two groups was statistically analyzed using Kappa test. Then we compared all the diagnoses of individual pathologist with the consensus opinion confirmed by two breast pathologists to analyze the diagnostic accuracy and undue diagnosis. Results Inter-observer reproducibility of the trial group was higher than that of the control group (The total K value of 6, 3, and 2 diagnoses in the two groups were 0.289 3, 0.337 1, 0.492 8, 0.100 3, 0.150 3 and 0.340 3, respectively). When the categories were simplified, inter-observer reproducibility increased. There were still undue diagnoses of different degrees among pathologists of the trial group. Conclusion Using the same criteria is an important method to increase the diagnostic reproducibility and accuracy. More practice is needed to familiarize with these criteria.
ObjectiveTo analyze the pathological manifestations and imaging characteristics of bronchiolar adenoma (BA).MethodsThe clinical data of 11 patients with BA who received surgeries in our hospital from January 2019 to September 2020 were retrospectively analyzed, including 5 males and 6 females aged 40-73 (62.40±10.50) years. The intraoperative rapid freezing pathological diagnosis, postoperative pathological classification, cell growth pattern, nuclear proliferation index Ki-67 and other immunohistochemical staining combined with preoperative chest CT imaging characteristics were analyzed.ResultsThe average preoperative observation time was 381.10±278.28 d. The maximum diameter of imaging lesions was 5-27 (10.27±6.34) mm. Eight (72.7%) patients presented with irregular morphology of heterogeneous ground-glass lesions, and 3 (27.3%) patients presented with pure ground-glass lesions. There were 10 (90.9%) patients with vascular signs, 8 (72.7%) patients with vacuolar signs, 1 (9.1%) patient with bronchus sign, 3 (27.3%) patients with pleural traction and 9 (81.8%) patients with burr/lobular sign. The surgical methods included sub-lobectomy in 10 patients and lobectomy in 1 patient. Five (45.5%) patients were reported BA by intraoperative frozen pathology. The postoperative pathological classification included 8 patients with distal-type and 3 patients with proximal-type, and the maximum diameter of the lesions was 4-20 (8.18±5.06) mm. Eight (72.7%) patients showed characteristic bilayer cell structure under microscope, and 10 (90.9%) patients showed thyroid transcription factor 1 expression in pathological tissues. The expression of NapsinA in intracavity cells was found in 9 (81.8%) patients. The Ki-67 index of the lesion tissue was 1%-5% (3.22%±1.72%).ConclusionThe pathological features and imaging findings of BA confirm the premise that BA is a neoplastic lesion. However, to identify BA as a benign or inert tumor needs more clinical data and evidence of molecular pathological studies.
Objective To explore the diagnosis and treatment strategies for elderly patients with ground-glass opacity (GGO) by reviewing the clinical data such as imaging features, surgical methods, postoperative pathological results and average hospital stay. MethodsThe imaging features and postoperative pathological findings of the elderly patients with pulmonary GGO in our hospital from January 2017 to December 2019 were retrospectively analyzed. The patients were divided into an elderly patient group and a non-elderly patient group based on their age. Results Finally 575 patients were included in the study. There were 281 elderly patients, including 83 males and 198 females, with an average age of 67.0±5.3 years. There were 294 non-elderly patients, including 88 males and 206 females, with an average age of 49.1±7.3 years. Compared with the non-elderly patients, elderly GGO patients showed the following distinct clinical features: the lesions were observed for a long time (P<0.001), the GGO margin was not smooth (P<0.001), the pleural signs (P<0.05) and bronchial signs (P<0.05) were obvious, there were more patients of type Ⅱ to Ⅳ GGO (P<0.001), more patients of lobectomy (P<0.05), and more patients of postoperative pathological reports of infiltrating lesions (P<0.05). There was no statistical difference in the average length of stay between the two groups (P>0.05). Multivariate logistic regression analysis showed that GGO diameter and GGO type were the main factors affecting the operation. Observation time, GGO diameter and GGO type were the main influencing factors for postoperative pathological infiltrative lesions. The cut-off value of GGO diameter in predicting infiltrating lesions was 10.5 mm in the elderly group. Conclusion The size and type of GGO are important factors in predicting invasive lesions and selecting surgical methods. Elderly patients with radiographic manifestations of type Ⅱ to Ⅳ GGO lesions with a diameter greater than 10.5 mm should be closely followed.
Objective To explore the clinical application of combination of radiolabeled colloid （99Tcm-sulphur colloid） and blue dye in sentinel lymph node biopsy （SLNB） for early-stage breast cancer. Methods SLNB was performed with the guidance of blue dye, radiolabeled colloid, and the combination method in all patients enrolled, and clinical and pathological data were recorded respectively for analysis. Results Two hundred and one patients were enrolled in this study and the SLN were successfully detected in 200 cases. The identification rate of radiolabeled colloid method and combination method was 99.5% （200/201） and 99.5% （198/199） respectively, which significantly higher than blue dye method （85.4%, P＜0.001）. There were no differences of accuracy rate 〔95.3% （162/170） vs. 94.5% （189/200） vs. 98.0% （194/198）, P=0.185〕 and false negative rate 〔11.3% （8/71） vs. 13.9% （11/79） vs. 5.1% （4/79）, P=0.165） between blue dye method, radiolabeled colloid method, and combination method. The combination method could detect more SLN than radiolabeled colloid method or blue dye method only （P＜0.001）. Compared to combination method, there were 12 and 7 patients miss diagnosed in blue dye method and radiolabeled colloid method, and the miss diagnosed rate was 16.0% （12/75） and 9.3% （7/75）, respectively. Conclusions Compared to radiolabeled colloid and blue dye method, combination method has higher identification rate, and could identify more SLNs. It is recommended that the combination of radiolabeled colloid and blue dye should be adapted for procedure of SLNB in clinical practice.