Objective:To evaluate the value of fast-track surgery(FTS)in gynecological laparoscopy during the perioperative period.Methods:The clinical data of 234 patients who underwent gynecological laparoscopy from January to ...Objective:To evaluate the value of fast-track surgery(FTS)in gynecological laparoscopy during the perioperative period.Methods:The clinical data of 234 patients who underwent gynecological laparoscopy from January to December in 2018 were collected.Of note,117 patients received a routine nursing method(control group),and 117 patients received the FTS nursing method(observation group).Results:Compared with the control group,FTS group had a quicker postoperative bowel function recovery,earlier to get out of bed,and a lower anxiety level(P<0.05);The incidence of postoperative nausea and vomiting of two groups had no statistical difference.Conclusions:The application of FTS in gynecological laparoscopy is safe,effective,and worth promoting.展开更多
The superplastic response of commercial 5083 alloy( Al-4. 42Mg) under uniaxial tension at strain rates ranging from 5 × 10- 5to 10- 2s- 1in the temperature interval 400- 550 ℃ was systematically studied in this ...The superplastic response of commercial 5083 alloy( Al-4. 42Mg) under uniaxial tension at strain rates ranging from 5 × 10- 5to 10- 2s- 1in the temperature interval 400- 550 ℃ was systematically studied in this paper. The tension test was conducted on samples of rolling direction. The maximum elongation-to-failure of 486% was found at 500 ℃ and strain rate of 10- 4s- 1. To identify the main characteristics of superplastic deformation and to determine the mechanism of superplastic deformation of the alloy,the microstructure and fracture of the alloy were analyzed as a function of strain,strain rate and temperature using optical microscopy( OM) and scanning electron microscopy( SEM),the apparent strain rate sensitivity exponent m a and the apparent activation energy Q a were also studied. Based on the fracture analysis and the calculated data of m a and Q a,it is suggested that the dominant deformation mechanism in the present alloy is grain boundary sliding( GBS) during the best deformation condition.展开更多
This article concentrates on the investigation of hot deformation behavior of conventionally rolled commercial grade AA5083 alloy( Al-4. 5Mg),for automotive and aviation applications. The superplastic response of the ...This article concentrates on the investigation of hot deformation behavior of conventionally rolled commercial grade AA5083 alloy( Al-4. 5Mg),for automotive and aviation applications. The superplastic response of the alloy was investigated at high strain rates( ≥10- 3s- 1),and a temperature range of 400 ℃ to 550 ℃. An elongation to failure of 201% was achieved at low temperature( 425 ℃) and high strain rate( 10- 2s- 1),which indicates sufficient ductility under hot deformation for manufacturing of extremely complex shapes using superplastic forming technology. Furthermore,the alloy exhibited a maximum elongation of about 470% at strain rate of 10- 3s- 1and a temperature of 525 ℃. The deformation and failure mechanisms at both the critical conditions were studied as a function of strain rate and temperature. The contributions of strain-rate sensitivity and strain hardening were analyzed in relation to the observed tensile ductilities. Deformation mechanism of the alloy was also investigated with reference to Strain rate sensitivity index( m) and Activation energy( Q) for the given test condition. Empirical calculations reveal that dominant deformation mechanism responsible for hot deformation of the alloy is grain boundary sliding( GBS),which is further supported by deformed surface examination using scanning electron microscopy( SEM). Fracture surfaces of the samples deformed to failure,at relatively higher and lower strain rates,was examined to investigate the micromechanisms governing failure. Phenomenon of cavity nucleation,growth and coalescence was observed to be the failure mechanism in the investigated alloy.展开更多
基金This project was supported by the effect of individualized preoperative intestinal preparation scheme on preoperative intestinal cleanliness in patients with cervical cancer(No.Q201607).
文摘Objective:To evaluate the value of fast-track surgery(FTS)in gynecological laparoscopy during the perioperative period.Methods:The clinical data of 234 patients who underwent gynecological laparoscopy from January to December in 2018 were collected.Of note,117 patients received a routine nursing method(control group),and 117 patients received the FTS nursing method(observation group).Results:Compared with the control group,FTS group had a quicker postoperative bowel function recovery,earlier to get out of bed,and a lower anxiety level(P<0.05);The incidence of postoperative nausea and vomiting of two groups had no statistical difference.Conclusions:The application of FTS in gynecological laparoscopy is safe,effective,and worth promoting.
基金Sponsored by the National Science and Technology Mayor Project(Grant No.2010ZX04014-073-01)
文摘The superplastic response of commercial 5083 alloy( Al-4. 42Mg) under uniaxial tension at strain rates ranging from 5 × 10- 5to 10- 2s- 1in the temperature interval 400- 550 ℃ was systematically studied in this paper. The tension test was conducted on samples of rolling direction. The maximum elongation-to-failure of 486% was found at 500 ℃ and strain rate of 10- 4s- 1. To identify the main characteristics of superplastic deformation and to determine the mechanism of superplastic deformation of the alloy,the microstructure and fracture of the alloy were analyzed as a function of strain,strain rate and temperature using optical microscopy( OM) and scanning electron microscopy( SEM),the apparent strain rate sensitivity exponent m a and the apparent activation energy Q a were also studied. Based on the fracture analysis and the calculated data of m a and Q a,it is suggested that the dominant deformation mechanism in the present alloy is grain boundary sliding( GBS) during the best deformation condition.
基金Sponsored by the National Science and Technology Major Project(Grant No.2010ZX04014-073-01)
文摘This article concentrates on the investigation of hot deformation behavior of conventionally rolled commercial grade AA5083 alloy( Al-4. 5Mg),for automotive and aviation applications. The superplastic response of the alloy was investigated at high strain rates( ≥10- 3s- 1),and a temperature range of 400 ℃ to 550 ℃. An elongation to failure of 201% was achieved at low temperature( 425 ℃) and high strain rate( 10- 2s- 1),which indicates sufficient ductility under hot deformation for manufacturing of extremely complex shapes using superplastic forming technology. Furthermore,the alloy exhibited a maximum elongation of about 470% at strain rate of 10- 3s- 1and a temperature of 525 ℃. The deformation and failure mechanisms at both the critical conditions were studied as a function of strain rate and temperature. The contributions of strain-rate sensitivity and strain hardening were analyzed in relation to the observed tensile ductilities. Deformation mechanism of the alloy was also investigated with reference to Strain rate sensitivity index( m) and Activation energy( Q) for the given test condition. Empirical calculations reveal that dominant deformation mechanism responsible for hot deformation of the alloy is grain boundary sliding( GBS),which is further supported by deformed surface examination using scanning electron microscopy( SEM). Fracture surfaces of the samples deformed to failure,at relatively higher and lower strain rates,was examined to investigate the micromechanisms governing failure. Phenomenon of cavity nucleation,growth and coalescence was observed to be the failure mechanism in the investigated alloy.
