Influence of oxygen partial pressure on properties of N-doped ZnO films deposited by magnetron sputtering

N-doped ZnO films were radio frequency(RF)sputtered on glass substrates and studied as a function of oxygen partial pressure(OPP)ranging from 3.0×10-4 to 9.5×10-3 Pa.X-ray diffraction patters confirmed the polycrystalline nature of the deposited films.The crystalline structure is influenced by the variation of OPP.Atomic force microscopy analysis confirmed the agglomeration of the neighboring spherical grains with a sharp increase of root mean square(RMS)roughness when the OPP is increased above 1.4×10-3 Pa.X-ray photoelectron spectroscopy analysis revealed that the incorporation of N content into the film is decreased with the increase of OPP,noticeably N 1s XPS peaks are hardly identified at 9.5×10-3 Pa.The average visible transmittance(380-700 nm) is increased with the increase of OPP(from～17%to 70%),and the optical absorption edge shifts towards the shorter wavelength.The films deposited with low OPP(≤3.0×10-4 Pa)show n-type conductivity and those deposited with high OPP(≥9.0×10-4 Pa)are highly resistive(>105Ω·cm)

The Effect of Oxygen Partial Pressure during Active Layer Deposition on Bias Stability of a-InGaZnO TFTs

The effect of oxygen partial pressure （Po2） during the channel layer deposition on bias stability of amorphous indium-gallium-zinc oxide （a-IGZO） thin film transistors （TFTs） is investigated. As Po2 increases from 10% to 30%, it is found that the device shows enhanced bias stress stability with significantly reduced threshold voltage drift under positive gate bias stress. Based on the x-ray photoelectron spectroscopy measurement, the concentration of oxygen vacancies （Or） within the a-IGZO layer is suppressed by increasing Po2. Meanwhile, the low-frequency noise analysis indicates that the average trap density near the channel/dielectric interface continuously drops with increasing Po2. Therefore, the improved interface quality with increasing Po2 during the channel layer deposition can be attributed to the reduction of interface Ov-related defects, which agrees with the enhanced bias stress stability of the a-IGZO TFTs.

Oxidation of Fe-Cr-Ni Alloys in a Low Oxygen Partial Pressure Atmosphere to Mitigate Coke Formation

Anti-coking oxide films were prepared on a 25Cr35Ni and 35Cr45Ni alloy surface under the low oxygen partialpressure atmosphere of a H2-H2O mixture. The composition and phase structure of the oxide films were analyzed by energydispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The anti-cokingperformance of a mini tube made of a HP40 (25Cr35Ni) alloy was evaluated on a bench scale pyrolysis and coking test unit.The results showed that the surface Fe and Ni content decreased after the oxidation of the two alloys in a low oxygen partialpressure atmosphere. The oxide films were mainly composed of MnCr_(2)O_(4) and Cr_(2)O_(3). The average mass of coke in the minitube with oxide film decreased by 87% relative to that of a tube without an oxide film when the cracking temperature was 900℃. The ethylene, propylene, and butadiene yields in the pyrolysis tests were almost the same for the mini tubes withand without an oxide film. The oxide film on the alloy surface effectively inhibited catalytic filamentous coke formation.An industrial test showed that the run length of the cracking furnace with the in-situ coating technology was significantlyextended.

Evaluation of Partial Pressure of Arterial Oxygen in Obese Patients in Supine Position during General Anesthesia

Background: Anesthetists should measure the concentration of supplemental oxygen to determine whether patients’ partial pressure of arterial oxygen (PaO2) is correct during general anesthesia. However, the standard PaO2 value in obese patients in the supine position is unknown. We evaluated the PaO2 with respect to the Broca-Katsura obesity index. Materials and Methods: From January 2001 to December 2013, we evaluated 472 patients aged ≥16 years old that underwent general anesthesia in the supine position. The anesthetic charts of 472 patients with an American Society of Anesthesiologists physical status of I or II were retrospectively reviewed to investigate the PaO2. Results: In patients aged 16 to 2 was 165.7 ± 25.6 mmHg at a Broca-Katsura index of 2 was 152.1 ± 23.8 mmHg at a Broca-Katsura index of 2 tended to decrease with age from 16 to 2 tended to decrease with age from 16 to <65 years at a Broca-Katsura index of 20% to <40%.

Effect of Oxygen Partial Pressure on Epitaxial Growth and Properties of Laser-Ablated AZO Thin Films

Al-doped ZnO（AZO） thin films were grown on c-sapphire substrates by laser ablation under different oxygen partial pressures（P_（O2））.The effect of P_（O2） on the crystal structure,preferred orientation as well as the electrical and optical properties of the films was investigated.The structure characterizations indicated that the as-grown films were single-phased with a wurtzite ZnO structure,showing a significant c-axis orientation.The films were well crystallized and exhibited better crystallinity and denser texture when deposited at higher P_（O2）.At the optimum oxygen partial pressures of 10- 15 Pa,the AZO thin films were epitaxially grown on c-sapphire substrates with the（0001） plane parallel to the substrate surface,i e,the epitaxial relationship was AZO（000 1） // A1_2O_3（000 1）.With increasing P_（O2）,the value of Hall carrier mobility was increased remarkably while that of carrier concentration was decreased slightly,which led to an enhancement in electrical conductivity of the AZO thin films.All the films were highly transparent with an optical transmittance higher than 85%.

Study on Oxygen Supply and Protection of Bone Marrow in Acute Radiation injured Mice

After irradiated by & Gy 60Co γ-ray, mice were intraperitoneally injected immediately with 0.2 ml 100 % compound blood-activating soup twice a day for 10 days. The in situ ulnar bone marrow partial pressure of oxygen (PbO2) was determined in vivo before, during and after irradiation respectively. The bone marrow sections in the same part were observed. Our results showed that the normal murine ulnar PbO2 was 12.72±1. 05kpa. During irradiation, the level of PbO2 decreased to 10. 78±1. 17 kpa (P＜0. 001). And 3 days after irradiation, PbO2 decreased to 9. 75±0. 52 kpa, suggesting that the commonly used 'blood-activating and stasis-eliminating' Chinese drugs could promote the rehabilitation and proliferation of bone marrow microvessels in the acute radiation injured mice, expand their areas, increase the oxygen supply of bone marrow microenviroment, thereby leading to PbO2 much higher increase than that of control group. It is also helpful in the proliferation and rehabilitation of hematopoietic cells.

Influence of moderate hypothermia on cerebral oxygenation in pigs with intracranial hypertension

BACKGROUND： Moderate hypothermia is one of the effective therapeutic methods for head injury in recent years, there are many mechanisms of moderate hypothermia for brain protection, and its influence on cerebral oxygenation is also one of them. OBJECTIVE： To observe the influence of moderate hypothermia on cerebral oxygenation of animals with acute intracranial hypertension, and further investigate the protective mechanism of moderate hypothermia. DESIGN： A randomized controlled trial. SETTING： Department of Neurosurgery, Renji Hospital affiliated to the Medical College of Shanghai Jiao Tong University. MATERIALS： Twenty healthy little pigs, either male or female, weighing 4.5-5.5 kg, were used. Neurotrend-typed multiparameter monitoring system （Diametrics Company, British）; CMA/100 micro-injection pump （Carnegie Company, Sweden）. METHODS： The experiment was conducted in the Changzheng Hospital affiliated to the Second Military Medical University of Chinese PLA in November, 2001. The pigs were randomized into two groups： the normothermia group （control group, n =10） and moderate hypothermia group （n =10）. ① Bilateral femoral arteries were separated, one was connected to pressometer for monitoring mean arterial pressure （MEP）, and the other for analysis of blood gases [including peripheral blood pH value, arterial partial pressure of carbon dioxide （PaCO2）, arterial partial pressure of carbon dioxide （PaCO2）, HCO3-]. ② Rectal temperature was monitored with mercurial thermometer. ③ Intracranial pressure was monitored using Camino optic ICP probe placed in the subdural space. ④ Neurotrend multiparameter monitoring sensor was inserted into the white matter for about 4 cm to determine cerebral perfusion pressure （CPP, CPP=MAP（ICP）, brain tissue partial oxygen pressure （PO2）, partial pressure of carbon dioxide （PCO2）, HCO3- and brain temperature. The rectal temperature of animals in the moderate hypothermia group was lowered to 34 ℃ using ice bags, and the body temperature was maintained at 33-35 ℃ for 2 hours. The changes of the parameters were observed continuously, and the pigs in the normothermia group were not treated with cooling. MAIN OUTCOME MEASURES： ① MAP, ICP, rectal temperature, CCP; Indexes of cerebral oxygenation detected with Neurotrend-typed multiparameter monitoring system; ② Results of blood gases analysis in the moderate hypothermia group. RESULTS： All the 20 pigs were involved in the analysis of results. ① MAP, ICP, rectal temperature, CCP and indexes of cerebral oxygenation： In the moderate hypothermia group, the ICP after cooling was obviously lower than that before cooling [（3.31±1.19）, （5.33±0.95） kPa, P 〈 0.05], CCP was higher, brain tissue PCO2 [（12.03±1.73）, （10.59±2.01） kPa, P 〈 0.05], and brain tissue pH value was higher [（7.03± 1.63）, （9.40±1.30） kPa, P 〈 0.05], whereas the brain temperature was decreased as compared with that before cooling [（34.9±0.3）, （37.2±0.2） ℃, P 〈 0.05]. ② Results of blood gases analysis in the moderate hypothermia group： There were no significant differences in the parameters of peripheral arterial blood gases analysis before and after cooling in the moderate hypothermia group （P 〉 0.05） CONCLUSION： Moderate hypothermia will not impair the cerebral oxygenation, and it can reduce brain tissue CO2 and decrease brain tissue acidosis.

Effects of oxygen partial pressure on optical absorption edge and UV emission energy of ZnO films

The optical absorption edge and ultraviolet (UV) emission energy of ZnO films deposited by direct current (DC) reactive magnetron sputtering at room temperature have been investigated. With the oxygen ratio increasing, the structure of films changes from zinc and zinc oxide coexisting phase to single-phase ZnO and finally to the highly (002) orientation. Both the grain size and the stress of ZnO film vary with the oxygen partial pressure. Upon increasing the oxygen partial pressure in the growing ambient, the visible emission in the room-temperature photoluminescence spectra was suppressed without sacrificing the band- edge emission intensity in the ultraviolet region. The peaks of photoluminescence spectra were located at 3.06—3.15 eV. Prom optical transmittance spectra of ZnO films, the optical band gap edge was observed to shift towards shorter wavelength with the increase of oxygen partial pressure.

Analysis of metabolic alterations in Arabidopsis following changes in the carbon dioxide and oxygen partial pressures

As sessile organisms,plants are subject to a multitude of environmental variations including several which directly affect their interaction with the atmosphere.Given the indiscriminant nature of Rubisco,the relative rates of photosynthesis and photorespiration are known to be responsive to changes in gas composition.However,comprehensive profiling methods have not yet been applied in order to characterize the wider consequences of these changes on primary metabolism in general.Moreover,although transcriptional profiling has revealed that a subset of photorespiratory enzymes are co-expressed,whether transcriptional responses play a role in short-term responses to atmospheric compositional changes remains unknown.To address these questions,plants Arabidopsis thaliana（Arabidopsis） ecotype Columbia（Col-O） grown under normal air conditions were transferred to different CO_2 and O_2 concentrations and characterized at the physiological,molecular,and metabolic levels following this transition.The results reveal alterations in the components,which are directly involved in,or supporting,photorespiration,including transcripts and metabolite levels.The results further highlight that the majority of the regulation of these pathways is not mediated at the level of transcription and that the photorespiratory pathway is essential also in conditions in which flux through the pathway is minimized,yet suggest that flux through this pathway is not mediated at the level of transcription.

Self-healing behavior of Ti_(2)AlC at a low oxygen partial pressure

Ti_(2)AlC,a MAX phase ceramic,has an attractive self-healing ability to restore performance via the oxidation-induced crack healing mechanism upon healing at high temperatures in air(high oxygen partial pressures).However,such healing ability to repair damages in vacuum or low oxygen partial pressure conditions remains unknown.Here,we report on the self-healing behavior of Ti_(2)AlC at a low oxygen partial pressure of about 1 Pa.The experimental results showed that the strength recovery depends on both healing temperature and time.After healing at 1400℃for 1–4 h,the healed samples exhibited the recovered strengths even exceeding the original strength of 375 MPa.The maximum recovered strength of~422 MPa was achieved in the healed Ti_(2)AlC sample after healing at 1400 for 4 h,about 13%higher than the original strength.Damages were healed by the formed℃TiCx from the decomposition of Ti_(2)AlC.The decomposition-induced crack healing as a new mechanism in the low oxygen partial pressure condition was disclosed for the MAX ceramics.The present study illustrates that key components made of Ti_(2)AlC can prolong their service life and keep their reliability during use at high temperatures in low oxygen partial pressures.

Effect of cerium addition on oxidation behavior of 25Cr20Ni alloy under low oxygen partial pressure

The influence of Ce addition on the oxidation behavior of 25Cr20Ni alloy at 950 oC under low oxygen partial pressure was inves-tigated. The oxidized samples were characterized by using X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy dispersive X-ray spectroscopy （EDS）, and scratch tester to obtain the oxide phases, morphology, thickness, composition and adhesion property of the oxide scales. The experiment results indicated that a small amount of Ce addition （0.02 wt.% or 0.05 wt.%） promoted oxidation resistance and inhibited the growth of the needlelike oxide. The Ce addition also decreased the formation of MnCr2O4 but promoted the SiO2 formation un-derneath the Cr2O3, which largely contributed to the improvement of oxide scale spallation resistance. For the sample with 0.3 wt.% Ce addi-tion, the oxidation rate significantly increased and the spallation resistance of the oxide scale decreased.

Effect of Oxygen Partial Pressure on Phase Equilibria and Liquidus in CaO-Al_2O_3-FeO_x System

A high temperature equilibration experiment was carried out to investigate the effect of oxygen partial pres- sure on the phase equilibria and liquidus in CaO-Al2O3- FeOx system with the intermediate oxygen partial pressures of 10.13 Pa and 1.01 × 10^-3 Pa. The equilibrated phases and their compositions of the quenched samples were analyzed by using SEM/EPMA （Scanning Electron Microscope/Electron Probe Micro Analysis） and XRD （X Ray Diffraction）. The phase equilibrium results include two cases, the two phase coexistence and the three-phase coexistence in the high Al2O3 region with oxygen partial pressure of either 10.13 Pa or 1.01 × 10^-3 Pa. Effects of oxygen partial pressure and temperature on the liquidus along the primary phase fields of CaO · Al2O3 and CaO · 2Al2O3 were nota hle. With the decrease of oxygen partial pressure, the liquid area expands and the liquidus of CaO · Al2O3 and CaO · 2Al2O3 primary fields moves to the Al2O3-FeOx region. On the other hand, the liquid area of CaO Al2O3-FeOx sys tem extends extremely to the high Al2O3 region with the temperature increasing from 1 400 to 1 500℃, especially at lower oxygen partial pressure. The present experiment results are in good agreement with the calculated ones by FactSage.

Effect of Ca^(2+) complexation on oxygen partial pressure in the urinary bladder meridian of goats

The aim of this paper was to explore the relationship between energy metabolism and the meridian phenomenon.The manner of change of oxygen partial pressure in acupoints and no-acupoints of the urinary bladder meridian of goats was observed with a needle-type tissue oxygen tension sensor after the acupuncture effect was blocked by Ca^(2+) complexation with ethylenediamine tetraacetic acid(EDTA)-Na2.The results showed that:(1)the concentration of calcium ion in urinary bladder meridian acupoints was higher than that in no-acupoints(P<0.01 or P<0.05);(2)the tissue oxygen tension in urinary bladder meridian acupoints was higher than that in no-acupoints(P<0.01);(3)the oxygen partial pressure in acupoints decreased significantly after injection with EDTA-Na2,compared with injection of either normal sodium or nothing(P<0.01);(4)the oxygen partial pressure in acupoints was higher than that in no-acupoints after EDTA-Na2 injection(P<0.01).Acupuncture could reduce oxygen partial pressure in acupoints by regulating microcirculation and increasing metabolic levels.

低负荷血流限制和高强度抗阻运动对男性运动青年大腿微循环功能的影响

背景:微循环作为人体物质能量代谢交换的唯一场所,与人体运动能力密切相关。抗阻运动是提高微循环功能的有效方式,但也有研究指出血流限制训练也能提高微循环功能,且具有负荷小和安全性高等优点。目的:比较6周低负荷血流限制运动、高强度抗阻运动对运动型男性青年大腿微循环功能的影响,并从血管内皮功能角度探讨运动改善微循环功能的可能机制。方法:将湖北民族大学60名体育专业男性大学生按照随机数表法分为对照组、高强度抗阻运动组和低负荷血流限制运动组,每组20人。低负荷血流限制运动组进行6周(每周3次、每次90 min、运动强度为30%1RM)的低负荷血流限制运动;高强度抗阻运动组进行6周(每周3次、每次90 min、运动强度为70%1RM强度)的抗阻训练;对照组该时间段不进行任何形式的运动训练。分别在干预开始的前1 d以及6周干预结束后次日的晨起空腹状态下对3组受试者微血管血流灌注量、经皮氧分压、肌氧饱和度、一氧化氮、内皮型一氧化氮合酶、内皮素1、血管内皮细胞生长因子及大腿围、肌力等指标进行测试。结果与结论:①运动干预后,低负荷血流限制运动组和高强度抗阻运动组的微血管血流灌注量加热值、血细胞移动速度加热值与对照组及运动干预前相比有显著差异(P<0.05);低负荷血流限制运动组微血管血流灌注量加热值、血细胞移动速度加热值与高强度抗阻运动组相比有显著差异(P<0.05);经皮氧分压和肌氧饱和度与干预前相比有显著性差异(P<0.05)。②运动干预后,低负荷血流限制运动组和高强度抗阻运动组一氧化氮、内皮型一氧化氮合酶、内皮素1、血管内皮细胞生长因子与对照组及运动干预前相比有显著差异(P<0.05)。③运动干预后,低负荷血流限制运动组和高强度抗阻运动组大腿围和大腿肌肉力量与运动干预前相比有显著差异(P<0.05)。④上述结果证实,6周低负荷血流限制运动和高强度抗阻运动可能通过调节内皮型一氧化氮合酶、内皮素1、血管内皮细胞生长因子等血管因子的分泌,提高体育专业大学生大腿微循环功能,并增加大腿肌肉的收缩力量,且低负荷血流限制运动对微血管血流灌注量、血细胞移动速度的干预效果更佳,因此低负荷血流限制运动较高强度抗阻运动在提高微循环功能方面更具优势。

不同吸入氧浓度对老年患者腹腔镜前列腺癌根治术后早期肺功能的影响

目的比较术中吸入氧浓度(FiO_(2))30%和80%对老年患者腹腔镜前列腺癌根治术后肺功能的影响。方法选择择期行腹腔镜前列腺癌根治术的老年患者60例,年龄≥65岁,BMI 18~30 kg/m^(2),ASAⅡ或Ⅲ级。采用随机数字表法将患者分为两组:FiO_(2)30%组(L组)和FiO_(2)80%组(H组),每组30例。气管插管后行肺复张,L组调整FiO_(2)为30%直至拔除气管导管。H组调整FiO_(2)为80%直至拔除气管导管。记录入室后5 min(T_(0))、手术开始后1 h(T_(1))、手术开始后2 h(T_(2))、拔管后30 min(T_(3))的HR、MAP,并行动脉血气分析记录PaO_(2)、PaCO_(2),计算氧合指数(OI)。于T_(0)、T_(3)时行电阻抗断层成像(EIT)监测,评估肺通气功能,记录中心通气区(CoV)、依赖静止区(DSS)、非依赖静止区(NSS)的面积百分比。术前1 d、术后第1、3、5天测定第1秒用力呼气容积(FEV_(1))、用力肺活量(FVC)、1秒率(FEV_(1)/FVC)。记录术后5 d内肺不张、呼吸道感染和胸腔积液等肺部并发症的发生情况。结果与H组比较,L组T_(3)时DSS面积百分比明显降低(P<0.05),PaO_(2)与OI明显升高(P<0.05),术后第1天FVC、FEV_(1)和FEV_(1)/FVC均明显升高(P<0.05),术后第3天FEV_(1)/FVC明显升高(P<0.05),术后5 d内肺不张发生率明显降低(P<0.05)。结论与FiO_(2)80%比较,术中FiO_(2)30%可以明显改善老年患者腹腔镜前列腺癌根治术后30 min肺通气、氧合功能与术后早期的肺功能,减少术后肺不张的发生。

循环流化床锅炉节能减碳运行调控及工程验证

构建基于烟气中氧气体积分数及炉膛出口压力的锅炉运行协同控制模型,可以实时、准确地预测烟气中氧气体积分数的变化趋势,提前给定锅炉二次风机和引风机控制指令,显著减小了不同负荷条件下锅炉烟气中氧气体积分数、负压等关键运行参数的波动.在300 t/h循环流化床锅炉上的工业验证结果表明:利用协同控制模型可以提高锅炉运行控制的品质,锅炉变负荷工况条件下烟气中氧气体积分数控制在目标值±0.25%范围内,炉膛出口压力控制在目标值±45 Pa范围内的统计概率为99%.运行一周的统计结果表明,相比于原有控制,协同控制模型投运后单位产汽量耗煤可以减小1.508%,单位产汽量风机耗电可以减少1.886%.

动态监测经皮血气分析指标和炎性指标对新生儿呼吸窘迫综合征并发支气管肺发育不良的预测价值

目的探讨动态监测经皮氧分压[p_(tc)(O_(2))]、经皮二氧化碳分压[p_(tc)(CO_(2))]与血清淀粉样蛋白A(SAA)、白细胞介素-6(IL-6)水平对新生儿呼吸窘迫综合征(NRDS)患儿并发支气管肺发育不良(BPD)的预测价值。方法选取240例NRDS患儿作为研究对象,根据是否并发BPD分为BPD组108例和非BPD组132例。比较2组患儿出生后第1、7、14天时p_(tc)(O_(2))、p_(tc)(CO_(2))、SAA、IL-6水平,采用Spearman相关分析法探讨各指标间的相关性及其与病情程度的相关性,采用相对危险度(RR)和95%置信区间(CI)评价各指标对NRDS患儿并发BPD的影响,采用受试者工作特征(ROC)曲线、决策曲线分析各指标预测BPD的效能及临床净获益。结果出生后第1天,2组患儿p_(tc)(O_(2))、p_(tc)(CO_(2))和血清SAA、IL-6水平比较,差异均无统计学意义(P>0.05);出生后第7、14天,BPD组p_(tc)(O_(2))低于非BPD组,p_(tc)(CO_(2))和血清SAA、IL-6水平高于非BPD组,差异有统计学意义(P<0.05)。相关性分析结果显示,患儿BPD程度与出生后第7天时p_(tc)(O_(2))呈负相关(r=-0.724,P<0.05),与出生后第7天时p_(tc)(CO_(2))、SAA、IL-6呈正相关(r=0.635、0.830、0.715,P<0.05);患儿肺功能障碍程度与出生后第7天时p_(tc)(O_(2))呈负相关(r=-0.719,P<0.05),与出生后第7天时p_(tc)(CO_(2))、SAA、IL-6呈正相关(r=0.673、0.756、0.696,P<0.05);出生后第7天时,BPD患儿p_(tc)(O_(2))分别与SAA、IL-6呈负相关(r=-0.605、-0.623,P<0.05),p_(tc)(CO_(2))分别与SAA、IL-6呈正相关(r=0.618、0.650,P<0.05)。ROC曲线显示,出生后第7天p_(tc)(O_(2))、p_(tc)(CO_(2))、SAA、IL-6联合预测NRDS并发BPD的效能优于四者单独预测,曲线下面积为0.938(95%CI:0.899~0.965)。p_(tc)(CO_(2))、SAA、IL-6高表达者并发BPD的风险是低表达者的2.256、1.668、1.667倍,p_(tc)(O_(2))高表达者并发BPD的风险是低表达者的0.568倍。决策曲线分析结果显示,当阈值在0.2~0.9时,出生后第7天时p_(tc)(O_(2))、p_(tc)(CO_(2))、SAA、IL-6联合模型预测NRDS患儿合并BPD的净获益率优于四者单独预测。结论p_(tc)(O_(2))、p_(tc)(CO_(2))、SAA、IL-6均与NRDS并发BPD患儿病情严重程度密切相关,四者联合检测有助于提高对NRDS并发BPD的预测效能及净获益率。

益气养阴汤联合西药治疗特发性肺纤维化缓解期临床研究

目的:观察益气养阴汤联合西药治疗特发性肺纤维化(IPF)缓解期的临床疗效。方法:采用随机数字表法将66例IPF缓解期患者分为试验组、对照组各33例。对照组给予常规西药治疗,试验组给予益气养阴汤联合西药治疗,2组连续治疗2个月。比较2组治疗前后中医证候积分、高分辨率CT(HRCT)半定量评分、肺功能指标[用力肺活量(FVC)、第1秒用力呼气容积(FEV_(1))、最大呼气峰流速(PEF)、肺总量(TLC)]、动脉血二氧化碳分压(PaCO_(2))、动脉血氧分压(PaO_(2)),评估2组临床疗效及不良反应发生情况。结果:试验过程中,试验组剔除2例,完成研究31例;对照组剔除3例,完成研究30例。治疗后,试验组总有效率为90.32%,高于对照组70.00%(P<0.05)。2组治疗后中医证候积分、HRCT半定量评分、PaCO_(2)水平均治疗前降低(P<0.05),PaO_(2)水平均升高(P<0.05);试验组治疗后中医证候积分、HRCT半定量评分、PaCO_(2)水平低于对照组(P<0.05),PaO_(2)水平高于对照组(P<0.05)。2组治疗后FVC、FEV_(1)、PEF、TLC水平均高于治疗前(P<0.05),且试验组治疗后肺功能指标均高于对照组(P<0.05)。试验组、对照组不良反应发生率分别为9.68%、13.33%,2组比较,差异无统计学意义(P>0.05)。结论:益气养阴汤联合西药治疗IPF缓解期疗效确切,能改善患者肺功能,缓解肺纤维化,安全性较高。

感染性休克液体复苏完成时限对病情转归的影响

目的 探究感染性休克液体复苏完成时限对患者病情转归的影响。方法 选取2020年7月—2023年7月收治的感染性休克156例,根据液体复苏完成时限分为<1 h组68例、1~2 h组57例、≥2 h组31例。比较3组液体复苏前后急性生理和慢性健康状况评分(APACHEⅡ)、序贯器官衰竭评分(SOFA)、血流动力学指标[中心静脉压(CVP)、心指数、外周血管阻力指数(SVRI)、每搏量指数(SVI)]、血乳酸、pH值、动脉血氧分压(PaO_(2))、动脉血二氧化碳分压(PaCO_(2))、血管外肺水指数(ELWI)、肺血管通透性指数(PVPI)、血肌酐、液体复苏量,以及去甲肾上腺素应用剂量、重症监护病房(ICU)住院时间、机械通气时间、28 d生存率。结果 <1 h组、1~2 h组复苏后APACHEⅡ、SOFA评分低于≥2 h组(P<0.05);≤1 h组、1~2 h组复苏后APACHEⅡ、SOFA评分无明显差异(P>0.05);<1 h组、1~2 h组复苏后CVP、心指数、SVI高于≥2 h组,SVRI低于≥2 h组(P<0.05);<1 h组、1~2 h组复苏后CVP、心指数、SVRI、SVI比较无明显差异(P>0.05)。<1 h组、1~2 h组复苏后血乳酸低于≥2 h组(P<0.05);<1 h组、1~2 h组复苏后血乳酸比较无明显差异(P>0.05);3组复苏后血pH值、PaO_(2)、PaCO_(2)比较无明显差异(P>0.05)。<1 h组复苏后ELWI、PVPI、血肌酐高于复苏前,并高于1~2 h组、≥2 h组(P<0.05);3组1 h液体复苏量比较无明显差异(P>0.05),<1 h组、1~2 h组、≥2 h组3 h液体复苏量呈依次降低趋势(P<0.05)。≥2 h组去甲肾上腺素剂量高于<1 h组、1~2 h组(P<0.05);<1 h组ICU住院时间、机械通气时间长于1~2 h组、≥2 h组(P<0.05)。1~2 h组、≥2 h组28 d生存率高于<1 h组(P<0.05,P<0.01)。结论 感染性休克患者初始液体复苏应在1~2 h内完成,能有效改善器官功能障碍和病情,维持血流动力学水平,加快恢复进程,促进病情良好转归。

新生儿胎粪吸入综合征预后关联因素分析及预测意义

目的:探究新生儿胎粪吸入综合征(MAS)预后结局的关联因素及预测意义。方法:回顾性分析2016年5月-2022年5月本院收治的MAS新生儿108例临床资料,根据治疗结果分为成功组与失败组并比较两组一般资料,多因素logistic回归法分析新生儿MAS预后结局的关联因素,受试者工作特征(ROC)曲线分析关联因素对新生儿MAS预后结局的预测价值。结果:108例MAS新生儿中,有21例院内死亡或放弃治疗(失败组),不良预后19.4%;成功组87例。多因素分析显示,窒息史(OR=1.370)、羊水污染程度高(OR=1.563)均是影响新生儿MAS预后结局的独立危险因素,补充益生菌(OR=0.700)、高动脉血氧分压(PaO_(2))/吸入氧浓度(FiO_(2))(OR=0.770)是新生儿MAS预后结局的保护因素(均P<0.05),PaO_(2)/FiO_(2)预测新生儿MAS预后的曲线下面积为0.970,价值较高。结论:窒息史、羊水污染程度、补充益生菌、PaO_(2)/FiO_(2)均与是新生儿MAS预后结局影响因素,PaO_(2)/FiO_(2)有一定预测价值,早期识别危险因素并制定干预措施对改善患儿预后有益。