1.Influence of Hedgehog signaling pathway activation on calvarial defect healing in type I diabetic mice
WU Yingzhang ; LIU Linan ; LIU Shibo ; HU Pei ; LUO En
Journal of Prevention and Treatment for Stomatological Diseases 2025;33(7):542-553
		                        		
		                        			Objective:
		                        			This study aimed to elucidate the mechanisms underlying the impaired bone healing capacity in type 1 diabetes (T1DM) by investigating the role of the Hedgehog (Hh) signaling pathway in the impaired healing of cranial defects caused by T1DM.
		                        		
		                        			Methods:
		                        			This study was approved by the experimental animal ethics committee of our hospital. A cranial defect model was established using Akita transgenic mice with spontaneous type I diabetes. The impact of T1DM on osteogenic differentiation and the Hh signaling pathway during cranial defect healing was explored by MicroCT scanning and immunohistochemical (IHC) analysis of osteocalcin (Ocn), Indian Hedgehog (Ihh), Patched1 (Ptch1), and zinc finger protein GLI1 (Gli1). Subsequently, the Hh signaling pathway was activated using smoothened agonist (SAG) (10 mg/kg, gavage), and its potential to improve cranial defect healing in T1DM was assessed by MicroCT and IHC staining. Finally, the ability of SAG (1 000 nmol/L) to counteract the inhibitory effects of a high-glucose environment (25 mol/L) on osteogenic differentiation of mouse bone marrow mesenchymal stem cells (BMSCs) was investigated through in vitro experiments. Detection methods included Alkaline Phosphatase and Alizarin Red staining, as well as quantitative real-time PCR (qPCR) analysis of the osteogenesis-related genes Alp, Spp1, Bglap, and Sp7.
		                        		
		                        			Results:
		                        			Akita mice exhibited early, stable, and significant spontaneous T1DM characteristics. On postoperative day 21, the newly formed bone in the cranial defect area of Akita mice showed significant decreases in the bone volume-to-tissue volume ratio, volumetric bone mineral density, and Ocn expression (P < 0.05), with significant downregulation of Ihh, Ptch1, and Gli1 (P < 0.05). Activation of the Hh signaling pathway by SAG significantly mitigated the negative impact of T1DM on cranial defect healing in Akita mice (P < 0.05). Moreover, after SAG treatment, the inhibitory effects of the high-glucose environment on the alkaline phosphatase activity and in vitro mineralization capacity of BMSCs were significantly alleviated (P < 0.05), and the expression levels of osteogenic differentiation-related genes were significantly upregulated (P < 0.05).
		                        		
		                        			Conclusion
		                        			T1DM inhibits cranial defect healing in Akita mice by suppressing the expression of the Hh signaling pathway, whereas activation of the Hh signaling pathway promotes osteogenesis and ameliorates the inhibitory effects of T1DM on bone healing.
		                        		
		                        		
		                        		
		                        	
2.Correlation Analysis Between Microbial Community Changes and Medicinal Quality Formation During Processing of Angelicae Dahuricae Radix
Xiaoyan CHEN ; Xinglong ZHU ; Qingxia GAN ; Jiahao WANG ; Guangqin AN ; Qinghua WU ; Jin PEI ; Yuntong MA
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(4):198-207
		                        		
		                        			
		                        			ObjectiveTo compare the differences in color, odor, coumarin content and microbial community composition of Angelicae Dahuricae Radix(ADR) during different drying processes, and to explore the correlation between changes in microbial community composition and changes in quality indexes of ADR. MethodsThe fresh ADR was processed at three drying temperatures(50, 70, 100 ℃) by drying and steaming cutting, semi-fresh cutting and drying, fresh cutting and drying, and sulfur fumigation methods. The color values of samples were extracted by Adobe Photoshop 2022 software and subjected to principal component analysis(PCA), electronic nose was used to identify the odor information of medicinal powders and subjected to loadings analysis, PCA, and linear discriminant analysis(LDA), and high performance liquid chromatography(HPLC) was used to determine the contents of five coumarins(bergapten, oxypeucedanin, imperatorin, phellopterin, isoimperatorin). The samples for microbial detection were taken from fresh dried samples, 50 ℃(dried and steamed cut, sulfur fumigated) samples, and 100 ℃(dried and steamed cut) samples when the water content was 50% and 14%, respectively. And the changes of microbial community composition during processing were determined by high-throughput sequencing method. The relationship between the changes of microbial community composition and the changes of odor, color and active component content of ADR during drying process was analyzed by Pearson correlation analysis. ResultsThe color quantification results showed that an increase in drying temperature led to the decrease of brightness value(L), and the increases of red-green value(a) and yellow-blue value(b), and the change of processing method had no obvious effect on the color of medicinal materials. The results of odor quantification showed that W1S, W2S, W5S, W2W and W1W sensor were sensitive to the odor changes of ADR and could be used to distinguish ADR decoction pieces from different processing methods. The results of HPLC showed that the coumarin content of ADR decreased with the increase of drying temperature and the delay of processing time, the optimal processing method was drying and steaming cutting method, and the optimal temperature was 50 ℃. High-throughput sequencing results showed that the dominant bacteria in ADR during processing were Achromobacter, Agrobacterium, Nocardioides, Mycobacterium and Enterobacter, the dominant fungi were Coprinopsis, Meyerozyma and Apiotrichum. The results of correlation analysis showed that the quality indexes of ADR were positively correlated with Agrobacterium, Mycobacterium in bacteria, Candida in fungi, and negatively correlated with Bacillus in bacteria. ConclusionThere are significant differences in the color, odor, coumarin content and microbial community composition of ADR in different drying processes, and the best drying method is drying and steaming cutting at 50 ℃. The relative abundance changes of 9 bacterial genera and 4 fungal genera are closely related to the quality formation of ADR during the drying process. 
		                        		
		                        		
		                        		
		                        	
3.Clinical study on the treatment of chronic atrophic gastritis with spleen and stomach weakness syndrome by Piwei Peiyuan Pill combined with moxibustion
Kairui WU ; Yu YE ; Bei PEI ; Biao SONG ; Yi ZHANG ; Tingting LI ; Qi YANG ; Yun LIU ; Xuejun LI
Journal of Beijing University of Traditional Chinese Medicine 2025;48(2):280-290
		                        		
		                        			Objective:
		                        			To determine the clinical efficacy and mechanism of Piwei Peiyuan Pill (PPP) combined with moxibustion for treating patients with chronic atrophic gastritis (CAG) with spleen and stomach weakness syndrome.
		                        		
		                        			Methods:
		                        			Ninety-six CAG patients with spleen and stomach weakness syndrome who met the inclusion and exclusion criteria were enrolled at the Department of Spleen and Stomach Diseases of the Second Affiliated Hospital of Anhui University of Chinese Medicine from June 2022 to December 2023. The patients were randomly divided into a control, a Chinese medicine, and a combined group using a random number table method, with 32 cases in each group (two cases per group were excluded). The control group was treated with rabeprazole combined with folic acid tablets (both thrice daily), the Chinese medicine group was treated with PPP (8 g, thrice daily), and the combined group was treated with moxa stick moxibustion (once daily) on the basis of the Chinese medicine group for 12 consecutive weeks. Gastric mucosa atrophy in the three groups was observed before and after treatment. The gastric mucosal pathological score was evaluated. The Patient Reported Outcome (PRO) scale was used to evaluate the patients′ physical and mental health status and quality of life.An enzyme-linked immunosorbent assay was used to detect serum tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-4, IL-10, IL-37, and transforming growth factor (TGF)-β levels in each group. Real-time fluorescence PCR was used to detect the relative expression levels of signal transducer and activator of transcription 3 (STAT3) and mammalian target of rapamycin (mTOR) mRNA in each group. Western blotting was used to detect the relative expression levels of proteins related to the STAT3/mTOR signaling pathway, and the adverse drug reactions and events were recorded and compared.
		                        		
		                        			Results:
		                        			There was no statistical difference in age, gender, disease duration, family history of gastrointestinal tumors, alcohol consumption history, and body mass index among the three groups of patients.The total therapeutic efficacy rates of the control, Chinese medicine, and combined groups in treating gastric mucosal atrophy were 66.67% (20/30), 86.67% (26/30), and 90.00% (27/30), respectively (P<0.05). Compared to before treatment, the pathological and PRO scale scores of gastric mucosa in each group decreased after treatment, and TNF-α, IL-1β, IL-37, and TGF-β levels decreased. The relative STAT3 and mTOR mRNA expression levels, as well as the relative STAT3, p-STAT3, mTOR, and p-mTOR protein expression levels decreased (P<0.05), whereas the IL-4 and IL-10 levels increased (P<0.05). After treatment, compared to the control group, the pathological score of gastric mucosa, PRO scale score, TNF-α, IL-1β, IL-37, TGF-β content, relative STAT3 and mTOR mRNA expression levels, and relative STAT3, p-STAT3, mTOR, and p-mTOR protein expression levels in the Chinese medicine and combined groups after treatment were reduced (P<0.05), whereas the IL-4 and IL-10 levels increased (P<0.05). After treatment, compared to the Chinese medicine group, the combined group showed a decrease in relative STAT3, mTOR mRNA expression levels, and STAT3, p-STAT3, mTOR, and p-mTOR protein expression levels (P<0.05). 
		                        		
		                        			Conclusion
		                        			The combination of PPP and moxibustion may regulate the inflammatory mechanism of the body by inhibiting the abnormal activation of the STAT3/mTOR signaling pathway, upregulating related anti-inflammatory factor levels, downregulating pro-inflammatory factor expression, and increasing related repair factor expression, thereby promoting the recovery of atrophic gastric mucosa, reducing discomfort symptoms, and improving the physical and mental state of CAG patients with spleen and stomach weakness syndrome. 
		                        		
		                        		
		                        		
		                        	
4.Outcomes of identifying enlarged vestibular aqueduct (Mondini malformation) related gene mutation in Mongolian people
Jargalkhuu E ; Tserendulam B ; Maralgoo J ; Zaya M ; Enkhtuya B ; Ulzii B ; Ynjinlhkam E ; Chuluun-Erdene Ts ; Chen-Chi Wu ; Cheng-Yu Tsai ; Yin-Hung Lin ; Yi-Hsin Lin ; Yen-Hui Chan ; Chuan-Jen Hsu ; Wei-Chung Hsu ; Pei-Lung Chen
Mongolian Journal of Health Sciences 2025;87(3):8-15
		                        		
		                        			Background:
		                        			Hearing loss (HL) is one of the most common sensory disorders, 
affecting over 5-8% of the world's population. Approximately half of HL cases are 
attributed to genetic factors. In hereditary deafness, about 75-80% is inherited 
through autosomal recessive inheritance, and common pathogenic genes include 
GJB2 and SLC26A4. Pathogenic variants in the SLC26A4gene are the leading 
cause of hereditary hearing loss in humans, second only to the GJB2 gene. Variants in the SLC26A4gene cause hearing loss, which can be non-syndromic autosomal recessive deafness (DFNB4, OMIM #600791) associated with enlarged 
vestibular aqueduct (EVA) or Pendred syndrome (Pendred, OMIM #605646). 
DFNB4 is characterized by sensorineural hearing loss combined with EVA or less 
common cochlear malformation defect. Pendred syndrome is characterized by bilateral sensorineural hearing loss with EVA and an iodine defect that can lead to 
thyroid goiter. Currently, it is known that EVA is associated with variants in the 
SLC26A4 gene and is a penetrant feature of SLC26A4-related HL. Predominant 
mutations in these genes differ significantly across populations. For instance, predominant SLC26A4 mutations differ among populations, including p.T416P and 
c.1001G>A in Caucasians, p.H723R in Japanese and Koreans, and c.919-2A>G 
in Han Taiwanese and Han Chinese. On the other hand, there has been no study 
of hearing loss related to SLC26A4 gene variants among Mongolians, which is the 
basis of our research.
		                        		
		                        			Aim:
		                        			We aimed to identify the characteristics of the SLC26A4 gene variants in 
Mongolian people with Enlarged vestibular aqueduct and Mondini malformation.
		                        		
		                        			Materials and Methods:
		                        			In 2022-2024, We included 13 people with hearing loss 
and enlarged vestibular aqueduct, incomplete cochlea (1.5 turns of the cochlea 
with cystic apex- incomplete partition type II- Mondini malformation) were examined by CT scan of the temporal bone in our study. WES (Whole exome sequencing) analysis was performed in the Genetics genetic-laboratory of the National 
Taiwan University Hospital.
		                        		
		                        			Results:
		                        			Genetic analysis revealed 26 confirmed pathogenic variants of bi-allelic 
SLC26A4 gene of 8 different types in 13 cases, and c.919-2A>G variant was dominant with 46% (12/26) in allele frequency, and c.2027T>A (p.L676Q) variant 19% 
(5/26), c.1318A>T(p.K440X) variant 11% (3/26), c.1229C>T (p.T410M) variant 8% 
(2/26) ) , c.716T>A (p.V239D), c.281C>T (p.T94I), c.1546dupC, and c.1975G>C 
(p.V659L) variants were each 4% (1/26)- revealed. Two male children, 11 years 
old (SLC26A4: c.919-2A>G) and 7 years old (SLC26A4: c.919-2A>G:, SLC26A4: 
c.2027T>A (p.L676Q))had history of born normal hearing and progressive hearing 
loss.
		                        		
		                        			Conclusions
		                        			1. 26 variants of bi-allelic SLC26A4 gene mutation were detected 
in Mongolian people with EVA and Mondini malformation, and c.919-2A>G was 
the most dominant allele variant, and rare variants such as c.1546dupC, c.716T>A 
(p.V239D) were detected.
2. Our study shows that whole-exome sequencing (WES) can identify gene 
mutations that are not detected by polymerase chain reaction (PCR) or NGS analysis.
		                        		
		                        		
		                        		
		                        	
5.Predicting Clinically Significant Prostate Cancer Using Urine Metabolomics via Liquid Chromatography Mass Spectrometry
Chung-Hsin CHEN ; Hsiang-Po HUANG ; Kai-Hsiung CHANG ; Ming-Shyue LEE ; Cheng-Fan LEE ; Chih-Yu LIN ; Yuan Chi LIN ; William J. HUANG ; Chun-Hou LIAO ; Chih-Chin YU ; Shiu-Dong CHUNG ; Yao-Chou TSAI ; Chia-Chang WU ; Chen-Hsun HO ; Pei-Wen HSIAO ; Yeong-Shiau PU ;
The World Journal of Men's Health 2025;43(2):376-386
		                        		
		                        			 Purpose:
		                        			Biomarkers predicting clinically significant prostate cancer (sPC) before biopsy are currently lacking. This study aimed to develop a non-invasive urine test to predict sPC in at-risk men using urinary metabolomic profiles. 
		                        		
		                        			Materials and Methods:
		                        			Urine samples from 934 at-risk subjects and 268 treatment-naïve PC patients were subjected to liquid chromatography/mass spectrophotometry (LC-MS)-based metabolomics profiling using both C18 and hydrophilic interaction liquid chromatography (HILIC) column analyses. Four models were constructed (training cohort [n=647]) and validated (validation cohort [n=344]) for different purposes. Model I differentiates PC from benign cases. Models II, III, and a Gleason score model (model GS) predict sPC that is defined as National Comprehensive Cancer Network (NCCN)-categorized favorable-intermediate risk group or higher (Model II), unfavorable-intermediate risk group or higher (Model III), and GS ≥7 PC (model GS), respectively. The metabolomic panels and predicting models were constructed using logistic regression and Akaike information criterion. 
		                        		
		                        			Results:
		                        			The best metabolomic panels from the HILIC column include 25, 27, 28 and 26 metabolites in Models I, II, III, and GS, respectively, with area under the curve (AUC) values ranging between 0.82 and 0.91 in the training cohort and between 0.77 and 0.86 in the validation cohort. The combination of the metabolomic panels and five baseline clinical factors that include serum prostate-specific antigen, age, family history of PC, previously negative biopsy, and abnormal digital rectal examination results significantly increased AUCs (range 0.88–0.91). At 90% sensitivity (validation cohort), 33%, 34%, 41%, and 36% of unnecessary biopsies were avoided in Models I, II, III, and GS, respectively. The above results were successfully validated using LC-MS with the C18 column. 
		                        		
		                        			Conclusions
		                        			Urinary metabolomic profiles with baseline clinical factors may accurately predict sPC in men with elevated risk before biopsy. 
		                        		
		                        		
		                        		
		                        	
6.Effect of mild hypercapnia during the recovery period on the emergence time from total intravenous anesthesia: a randomized controlled trial
Lan LIU ; Xiangde CHEN ; Qingjuan CHEN ; Xiuyi LU ; Lili FANG ; Jinxuan REN ; Yue MING ; Dawei SUN ; Pei CHEN ; Weidong WU ; Lina YU
Korean Journal of Anesthesiology 2025;78(3):215-223
		                        		
		                        			 Background:
		                        			 Intraoperative hypercapnia reduces the time to emergence from volatile anesthetics, but few clinical studies have explored the effect of hypercapnia on the emergence time from intravenous (IV) anesthesia.  We investigated the effect of inducing mild hypercapnia during the recovery period on the emergence time after total IV anesthesia (TIVA). 
		                        		
		                        			Methods:
		                        			 Adult patients undergoing transurethral lithotripsy under TIVA were randomly allocated to normocapnia group (end-tidal carbon dioxide [ETCO2] 35–40 mmHg) or mild hypercapnia group (ETCO2 50-55 mmHg) during the recovery period.  The primary outcome was the extubation time.  The spontaneous breathing-onset time, voluntary eye-opening time, and hemodynamic data were collected.  Changes in the cerebral blood flow velocity in the middle cerebral artery were assessed using transcranial Doppler ultrasound. 
		                        		
		                        			Results:
		                        			 In total, 164 patients completed the study.  The extubation time was significantly shorter in the mild hypercapnia (13.9 ± 5.9 min, P = 0.024) than in the normocapnia group (16.3 ± 7.6 min).  A similar reduction was observed in spontaneous breathing-onset time (P = 0.021) and voluntary eye-opening time (P = 0.008).  Multiple linear regression analysis revealed that the adjusted ETCO2 level was a negative predictor of extubation time.  Middle cerebral artery blood flow velocity was significantly increased after ETCO2 adjustment for mild hypercapnia, which rapidly returned to baseline, without any adverse reactions, within 20 min after extubation. 
		                        		
		                        			Conclusions
		                        			 Mild hypercapnia during the recovery period significantly reduces the extubation time after TIVA.  Increased ETCO2 levels can potentially enhance rapid recovery from IV anesthesia. 
		                        		
		                        		
		                        		
		                        	
7.Predicting Clinically Significant Prostate Cancer Using Urine Metabolomics via Liquid Chromatography Mass Spectrometry
Chung-Hsin CHEN ; Hsiang-Po HUANG ; Kai-Hsiung CHANG ; Ming-Shyue LEE ; Cheng-Fan LEE ; Chih-Yu LIN ; Yuan Chi LIN ; William J. HUANG ; Chun-Hou LIAO ; Chih-Chin YU ; Shiu-Dong CHUNG ; Yao-Chou TSAI ; Chia-Chang WU ; Chen-Hsun HO ; Pei-Wen HSIAO ; Yeong-Shiau PU ;
The World Journal of Men's Health 2025;43(2):376-386
		                        		
		                        			 Purpose:
		                        			Biomarkers predicting clinically significant prostate cancer (sPC) before biopsy are currently lacking. This study aimed to develop a non-invasive urine test to predict sPC in at-risk men using urinary metabolomic profiles. 
		                        		
		                        			Materials and Methods:
		                        			Urine samples from 934 at-risk subjects and 268 treatment-naïve PC patients were subjected to liquid chromatography/mass spectrophotometry (LC-MS)-based metabolomics profiling using both C18 and hydrophilic interaction liquid chromatography (HILIC) column analyses. Four models were constructed (training cohort [n=647]) and validated (validation cohort [n=344]) for different purposes. Model I differentiates PC from benign cases. Models II, III, and a Gleason score model (model GS) predict sPC that is defined as National Comprehensive Cancer Network (NCCN)-categorized favorable-intermediate risk group or higher (Model II), unfavorable-intermediate risk group or higher (Model III), and GS ≥7 PC (model GS), respectively. The metabolomic panels and predicting models were constructed using logistic regression and Akaike information criterion. 
		                        		
		                        			Results:
		                        			The best metabolomic panels from the HILIC column include 25, 27, 28 and 26 metabolites in Models I, II, III, and GS, respectively, with area under the curve (AUC) values ranging between 0.82 and 0.91 in the training cohort and between 0.77 and 0.86 in the validation cohort. The combination of the metabolomic panels and five baseline clinical factors that include serum prostate-specific antigen, age, family history of PC, previously negative biopsy, and abnormal digital rectal examination results significantly increased AUCs (range 0.88–0.91). At 90% sensitivity (validation cohort), 33%, 34%, 41%, and 36% of unnecessary biopsies were avoided in Models I, II, III, and GS, respectively. The above results were successfully validated using LC-MS with the C18 column. 
		                        		
		                        			Conclusions
		                        			Urinary metabolomic profiles with baseline clinical factors may accurately predict sPC in men with elevated risk before biopsy. 
		                        		
		                        		
		                        		
		                        	
8.Predicting Clinically Significant Prostate Cancer Using Urine Metabolomics via Liquid Chromatography Mass Spectrometry
Chung-Hsin CHEN ; Hsiang-Po HUANG ; Kai-Hsiung CHANG ; Ming-Shyue LEE ; Cheng-Fan LEE ; Chih-Yu LIN ; Yuan Chi LIN ; William J. HUANG ; Chun-Hou LIAO ; Chih-Chin YU ; Shiu-Dong CHUNG ; Yao-Chou TSAI ; Chia-Chang WU ; Chen-Hsun HO ; Pei-Wen HSIAO ; Yeong-Shiau PU ;
The World Journal of Men's Health 2025;43(2):376-386
		                        		
		                        			 Purpose:
		                        			Biomarkers predicting clinically significant prostate cancer (sPC) before biopsy are currently lacking. This study aimed to develop a non-invasive urine test to predict sPC in at-risk men using urinary metabolomic profiles. 
		                        		
		                        			Materials and Methods:
		                        			Urine samples from 934 at-risk subjects and 268 treatment-naïve PC patients were subjected to liquid chromatography/mass spectrophotometry (LC-MS)-based metabolomics profiling using both C18 and hydrophilic interaction liquid chromatography (HILIC) column analyses. Four models were constructed (training cohort [n=647]) and validated (validation cohort [n=344]) for different purposes. Model I differentiates PC from benign cases. Models II, III, and a Gleason score model (model GS) predict sPC that is defined as National Comprehensive Cancer Network (NCCN)-categorized favorable-intermediate risk group or higher (Model II), unfavorable-intermediate risk group or higher (Model III), and GS ≥7 PC (model GS), respectively. The metabolomic panels and predicting models were constructed using logistic regression and Akaike information criterion. 
		                        		
		                        			Results:
		                        			The best metabolomic panels from the HILIC column include 25, 27, 28 and 26 metabolites in Models I, II, III, and GS, respectively, with area under the curve (AUC) values ranging between 0.82 and 0.91 in the training cohort and between 0.77 and 0.86 in the validation cohort. The combination of the metabolomic panels and five baseline clinical factors that include serum prostate-specific antigen, age, family history of PC, previously negative biopsy, and abnormal digital rectal examination results significantly increased AUCs (range 0.88–0.91). At 90% sensitivity (validation cohort), 33%, 34%, 41%, and 36% of unnecessary biopsies were avoided in Models I, II, III, and GS, respectively. The above results were successfully validated using LC-MS with the C18 column. 
		                        		
		                        			Conclusions
		                        			Urinary metabolomic profiles with baseline clinical factors may accurately predict sPC in men with elevated risk before biopsy. 
		                        		
		                        		
		                        		
		                        	
9.Effect of mild hypercapnia during the recovery period on the emergence time from total intravenous anesthesia: a randomized controlled trial
Lan LIU ; Xiangde CHEN ; Qingjuan CHEN ; Xiuyi LU ; Lili FANG ; Jinxuan REN ; Yue MING ; Dawei SUN ; Pei CHEN ; Weidong WU ; Lina YU
Korean Journal of Anesthesiology 2025;78(3):215-223
		                        		
		                        			 Background:
		                        			 Intraoperative hypercapnia reduces the time to emergence from volatile anesthetics, but few clinical studies have explored the effect of hypercapnia on the emergence time from intravenous (IV) anesthesia.  We investigated the effect of inducing mild hypercapnia during the recovery period on the emergence time after total IV anesthesia (TIVA). 
		                        		
		                        			Methods:
		                        			 Adult patients undergoing transurethral lithotripsy under TIVA were randomly allocated to normocapnia group (end-tidal carbon dioxide [ETCO2] 35–40 mmHg) or mild hypercapnia group (ETCO2 50-55 mmHg) during the recovery period.  The primary outcome was the extubation time.  The spontaneous breathing-onset time, voluntary eye-opening time, and hemodynamic data were collected.  Changes in the cerebral blood flow velocity in the middle cerebral artery were assessed using transcranial Doppler ultrasound. 
		                        		
		                        			Results:
		                        			 In total, 164 patients completed the study.  The extubation time was significantly shorter in the mild hypercapnia (13.9 ± 5.9 min, P = 0.024) than in the normocapnia group (16.3 ± 7.6 min).  A similar reduction was observed in spontaneous breathing-onset time (P = 0.021) and voluntary eye-opening time (P = 0.008).  Multiple linear regression analysis revealed that the adjusted ETCO2 level was a negative predictor of extubation time.  Middle cerebral artery blood flow velocity was significantly increased after ETCO2 adjustment for mild hypercapnia, which rapidly returned to baseline, without any adverse reactions, within 20 min after extubation. 
		                        		
		                        			Conclusions
		                        			 Mild hypercapnia during the recovery period significantly reduces the extubation time after TIVA.  Increased ETCO2 levels can potentially enhance rapid recovery from IV anesthesia. 
		                        		
		                        		
		                        		
		                        	
10.Effect of mild hypercapnia during the recovery period on the emergence time from total intravenous anesthesia: a randomized controlled trial
Lan LIU ; Xiangde CHEN ; Qingjuan CHEN ; Xiuyi LU ; Lili FANG ; Jinxuan REN ; Yue MING ; Dawei SUN ; Pei CHEN ; Weidong WU ; Lina YU
Korean Journal of Anesthesiology 2025;78(3):215-223
		                        		
		                        			 Background:
		                        			 Intraoperative hypercapnia reduces the time to emergence from volatile anesthetics, but few clinical studies have explored the effect of hypercapnia on the emergence time from intravenous (IV) anesthesia.  We investigated the effect of inducing mild hypercapnia during the recovery period on the emergence time after total IV anesthesia (TIVA). 
		                        		
		                        			Methods:
		                        			 Adult patients undergoing transurethral lithotripsy under TIVA were randomly allocated to normocapnia group (end-tidal carbon dioxide [ETCO2] 35–40 mmHg) or mild hypercapnia group (ETCO2 50-55 mmHg) during the recovery period.  The primary outcome was the extubation time.  The spontaneous breathing-onset time, voluntary eye-opening time, and hemodynamic data were collected.  Changes in the cerebral blood flow velocity in the middle cerebral artery were assessed using transcranial Doppler ultrasound. 
		                        		
		                        			Results:
		                        			 In total, 164 patients completed the study.  The extubation time was significantly shorter in the mild hypercapnia (13.9 ± 5.9 min, P = 0.024) than in the normocapnia group (16.3 ± 7.6 min).  A similar reduction was observed in spontaneous breathing-onset time (P = 0.021) and voluntary eye-opening time (P = 0.008).  Multiple linear regression analysis revealed that the adjusted ETCO2 level was a negative predictor of extubation time.  Middle cerebral artery blood flow velocity was significantly increased after ETCO2 adjustment for mild hypercapnia, which rapidly returned to baseline, without any adverse reactions, within 20 min after extubation. 
		                        		
		                        			Conclusions
		                        			 Mild hypercapnia during the recovery period significantly reduces the extubation time after TIVA.  Increased ETCO2 levels can potentially enhance rapid recovery from IV anesthesia. 
		                        		
		                        		
		                        		
		                        	
            

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