Objective:To evaluate the thermal insulation performance of a new fast buoyant ascent escape suit in a specific low temperature environment，so as to provide a basis for the subsequent development of the suit and determining the stand-by time on the surface for rescue.Methods:Five subjects in new fast buoyant ascent escape suits were placed in a low temperature environment with water temperature（-1.0 ± 1.0）℃，air temperature（-2.0 ± 1.0）℃ and wind speed（9.0 ± 0.2）m/s . The changes of core body temperature，average body surface temperature，and heart rate were observed，and the participants’ subjective feelings and tolerance periods of time were recorded.Results:The core body temperature，average body surface temperature，and heart rate of the 5 subjects were within normal range. The tolerance periods of time were all more than 6 h，and the longest period of time reached 6.5 h.Conclusion:The thermal insulation performance of the new fast buoyant ascent escape suit can be maintained for more than 6 hours in a specific low-temperature environment，which meets the design requirements.

Objective:To evaluate the thermal insulation performance of a new fast buoyant ascent escape suit in a specific low temperature environment，so as to provide a basis for the subsequent development of the suit and determining the stand-by time on the surface for rescue.Methods:Five subjects in new fast buoyant ascent escape suits were placed in a low temperature environment with water temperature（-1.0 ± 1.0）℃，air temperature（-2.0 ± 1.0）℃ and wind speed（9.0 ± 0.2）m/s . The changes of core body temperature，average body surface temperature，and heart rate were observed，and the participants’ subjective feelings and tolerance periods of time were recorded.Results:The core body temperature，average body surface temperature，and heart rate of the 5 subjects were within normal range. The tolerance periods of time were all more than 6 h，and the longest period of time reached 6.5 h.Conclusion:The thermal insulation performance of the new fast buoyant ascent escape suit can be maintained for more than 6 hours in a specific low-temperature environment，which meets the design requirements.

Objective:To study the dynamic air supply peculiarity of the inflation system, by observing the pressure changes of the inflation system, the airbag, and the hood in working mode.Methods:The pressurized chamber for simulation was pressurized to the setting pressure P1 at an exponential rate of . When setting the P1 as 0.2 MPa, 0.7 MPa, 1.1 MPa, 1.6 MPa, and 2.1 MPa, the pressurization time constant b was taken as 30 s, 20 s, 10 s, 7 s, and 4 s respectively. The air supply flow of the inflation system ( Q), the relative pressure in the airbag (Δ P) of the escape immersion suit, and the relative liquid level in the hood (Δ Z) were recorded during the pressurization process, for describing and analyzing the dynamic air supply peculiarity. Results:When the pressure of the simulated pressurized chamber increased to 0.2 MPa, Q increased rapidly and linearly. The functional relation between the linear slope k and b was K=747.81 b-0.26; then a short plateau period of Q appeared with the fluctuation range of 0.9-3.1 kg/h and the pressure range of 0.2-0.4 MPa; after that, Q gradually increased as the environmental pressure increased. The change of the relative pressure in the airbag (Δ P) reflected the regulation process of Q. When pressurized at 0.15 MPa, Δ P increased sharply to the highest value, then it tended to be stable with the increase of the pressure in the simulated pressurized chamber; the higher the P1 was set, the higher Δ P became, but it always remained between 11 kPa and 14 kPa. The functional relation between Δ P and P1 was Δ P= P10.088 4. The relative liquid level in the hood (Δ Z) was the ultimate goal of the air supply of the inflation system. Δ Z was always lower than the liquid level in the simulated pressurized chamber during the pressurization process, and decreased when the pressure of the chamber increased; Δ Z was related to Δ P, and the higher Δ P was, the higher Δ Z was, at the same depth. Conclusion:The airflow of escape immersion suit′s inflation system can match the compress rate of simulated pressurized chamber, and the air supply can be adjusted automatically without manual operation, which can improve the safety of escape.

Objective:To study the dynamic air supply peculiarity of the inflation system, by observing the pressure changes of the inflation system, the airbag, and the hood in working mode.Methods:The pressurized chamber for simulation was pressurized to the setting pressure P1 at an exponential rate of . When setting the P1 as 0.2 MPa, 0.7 MPa, 1.1 MPa, 1.6 MPa, and 2.1 MPa, the pressurization time constant b was taken as 30 s, 20 s, 10 s, 7 s, and 4 s respectively. The air supply flow of the inflation system ( Q), the relative pressure in the airbag (Δ P) of the escape immersion suit, and the relative liquid level in the hood (Δ Z) were recorded during the pressurization process, for describing and analyzing the dynamic air supply peculiarity. Results:When the pressure of the simulated pressurized chamber increased to 0.2 MPa, Q increased rapidly and linearly. The functional relation between the linear slope k and b was K=747.81 b-0.26; then a short plateau period of Q appeared with the fluctuation range of 0.9-3.1 kg/h and the pressure range of 0.2-0.4 MPa; after that, Q gradually increased as the environmental pressure increased. The change of the relative pressure in the airbag (Δ P) reflected the regulation process of Q. When pressurized at 0.15 MPa, Δ P increased sharply to the highest value, then it tended to be stable with the increase of the pressure in the simulated pressurized chamber; the higher the P1 was set, the higher Δ P became, but it always remained between 11 kPa and 14 kPa. The functional relation between Δ P and P1 was Δ P= P10.088 4. The relative liquid level in the hood (Δ Z) was the ultimate goal of the air supply of the inflation system. Δ Z was always lower than the liquid level in the simulated pressurized chamber during the pressurization process, and decreased when the pressure of the chamber increased; Δ Z was related to Δ P, and the higher Δ P was, the higher Δ Z was, at the same depth. Conclusion:The airflow of escape immersion suit′s inflation system can match the compress rate of simulated pressurized chamber, and the air supply can be adjusted automatically without manual operation, which can improve the safety of escape.

Objective To study the therapeutic effect of hyperbaric oxygen HBO) combined with repetitive transcranial magnetic stimulation (rTMS) in the treatment of coma following craniocerebral trauma.Methods One hundred and twenty coma patients caused by craniocerebral trauma were randomly selected for the study.Those patients without treatment or without rTMS were assigned as the control groups,and the group with Glasgow coma scale (GCS) scures of 6-8 was further assigned as the CA group,and the group with GCS scores of 3-5 was assigned as the CB group.In those patients who received HBO therapy,the ones with GCS scores of 6-8 were assigned as the HA group,and the ones with GCS scores of 3-5 were assigned as the HB group (conventional therapy group B).In those patients who received both HBO and rTMS therapy,the ones with GCS scores of 6-8 were assigned as the rTA group,while the ones with GCS scores of 3-5 were assigned as the rTB group.The patients of the 6 groups were given conventional therapy for the treatment of brain trauma,such as neural nutrition,anti-infection and maintenance of electrodes.The patients in the HA group and HB group were additionally treated with HBO,while the patients in the rTA and rTB groups were further treated with HBO and rTMS.The patients received HBO therapy at a pressure of 0.25 MPa,once a day,10 days a treatment course,for a succession of 3 courses.The stimulation intensity of the rTMS treatment protocol was set at 0.72 T,with the frequency of the magnetic field being 0.5 HZ.The patients had 30 stimulations for every sequence,one sequence a day,12 days a treatment course for a succession of 3 courses.Scores of Glasgow Coma Scale (GCS) and Glasgow Outcome Scale (GOS) before and after treatment were assessed and statistically analyzed.Results After 3 successive treatment courses,the patients with GCS scores of 6-8 were further treated with HBO combined with rTMS in addition to conventional therapy.The GCS scores of the HBO + rTMS + conventional therapy group were as high as(11.15 ± 4.17),which were higher than the scores of the HBO + conventional therapy group (9.05 ± 3.12),which were also higher than the scores of the conventional therapy group (7.50 ± 1.99).Statistical significance could be noted,when comparisons were made between the 3 groups(P ＜ 0.05).GOS scores of the HBO + rTMS + conventional therapy group (4.45 ± 0.83) were higher than those of the conventional therapy group (3.90 ± 0.55),with statistical significance (P ＜0.05).Conclusions The patients with GCS scores of 6-8 treated with HBO + rTMS + conventional therapy had better rehabilitation effect and prognosis,and therapeutic results were obviously superior to those of the patients treated with simple conventional therapy and HBO + conventional therapy.

Objective To study the therapeutic effect of hyperbaric oxygen HBO) combined with repetitive transcranial magnetic stimulation (rTMS) in the treatment of coma following craniocerebral trauma.Methods One hundred and twenty coma patients caused by craniocerebral trauma were randomly selected for the study.Those patients without treatment or without rTMS were assigned as the control groups,and the group with Glasgow coma scale (GCS) scures of 6-8 was further assigned as the CA group,and the group with GCS scores of 3-5 was assigned as the CB group.In those patients who received HBO therapy,the ones with GCS scores of 6-8 were assigned as the HA group,and the ones with GCS scores of 3-5 were assigned as the HB group (conventional therapy group B).In those patients who received both HBO and rTMS therapy,the ones with GCS scores of 6-8 were assigned as the rTA group,while the ones with GCS scores of 3-5 were assigned as the rTB group.The patients of the 6 groups were given conventional therapy for the treatment of brain trauma,such as neural nutrition,anti-infection and maintenance of electrodes.The patients in the HA group and HB group were additionally treated with HBO,while the patients in the rTA and rTB groups were further treated with HBO and rTMS.The patients received HBO therapy at a pressure of 0.25 MPa,once a day,10 days a treatment course,for a succession of 3 courses.The stimulation intensity of the rTMS treatment protocol was set at 0.72 T,with the frequency of the magnetic field being 0.5 HZ.The patients had 30 stimulations for every sequence,one sequence a day,12 days a treatment course for a succession of 3 courses.Scores of Glasgow Coma Scale (GCS) and Glasgow Outcome Scale (GOS) before and after treatment were assessed and statistically analyzed.Results After 3 successive treatment courses,the patients with GCS scores of 6-8 were further treated with HBO combined with rTMS in addition to conventional therapy.The GCS scores of the HBO + rTMS + conventional therapy group were as high as(11.15 ± 4.17),which were higher than the scores of the HBO + conventional therapy group (9.05 ± 3.12),which were also higher than the scores of the conventional therapy group (7.50 ± 1.99).Statistical significance could be noted,when comparisons were made between the 3 groups(P ＜ 0.05).GOS scores of the HBO + rTMS + conventional therapy group (4.45 ± 0.83) were higher than those of the conventional therapy group (3.90 ± 0.55),with statistical significance (P ＜0.05).Conclusions The patients with GCS scores of 6-8 treated with HBO + rTMS + conventional therapy had better rehabilitation effect and prognosis,and therapeutic results were obviously superior to those of the patients treated with simple conventional therapy and HBO + conventional therapy.