Thread lifting is one of the widely chosen procedures for minimally invasive facial rejuvenation. Traditional facial thread lifting has nearly inevitable side effects e.g. facial edema, facial bruising, prolonged reco...Thread lifting is one of the widely chosen procedures for minimally invasive facial rejuvenation. Traditional facial thread lifting has nearly inevitable side effects e.g. facial edema, facial bruising, prolonged recovery, skin puckering, and visible and/or palpable threads, as well as less common complications e.g. damage of facial vital structures. Applying the extrafacial loose areolar (XFLA) thread lifting technique by using loose areolar connective tissue, the fourth layer of the scalp, as insertion medium for the threads to be anchored to the layer above (epicranial aponeurosis or galea aponeurotica) and the layer below (pericranium), could help minimize most of the previously mentioned side effects. In this manuscript, technique steps will be detailed to prove its novelty.展开更多
Embedding thread lift rhytidectomy,also known as“thread lifting”in China,with the natures of simple operation,less trauma and quick recovery,is progressively used in clinical practice as a new technology of face lif...Embedding thread lift rhytidectomy,also known as“thread lifting”in China,with the natures of simple operation,less trauma and quick recovery,is progressively used in clinical practice as a new technology of face lifting.Herewith,a brief introduction of the previous advances of thread lifting techniques and materials in the facial beauty industry,combined with the discussion on various types of sutures,common complications,and the site of actions were provided.The main limitations of present thread lifting material include:(1)the use of non-absorbable sutures is liable to cause allergies and a series of complications;(2)the absorbable sutures are easily degradation,and people need to reshape in a relatively short period.Therefore,the high biocompatible spider silk was proposed as a novel material of thread lifting suture and related devices,the advantages and preliminary achievements on spider silk were also addressed.展开更多
The Three Gorges Project（TGP） ship lift employs 4 safety mechanisms, of which one consists of a rotary locking screw and a nut jaw column. The thread pair clearance（TPC） of safety mechanisms is set at 60 mm. Owing...The Three Gorges Project（TGP） ship lift employs 4 safety mechanisms, of which one consists of a rotary locking screw and a nut jaw column. The thread pair clearance（TPC） of safety mechanisms is set at 60 mm. Owing to influential factors,the TPC changes randomly in the upward/downward-stroke of the ship chamber. If it diminished to 0, the safety mechanism would be jammed, thus resulting in disastrous accidents. By the bearing test of the drive system, 7 influential factors have been studied; 15 other influential factors（including 8 factors of manufacture and installation deviation, 3 factors of chamber offset, 2 factors of external load and 2 factors of wear） have been analyzed based on the design data. Results by the limit superposition reveal that the TPC change varies from -43.8 mm to ＋48.4 mm when the water level of the chamber ranges from 3.4 m to 3.6 m. According to the Gaussian distribution, the probability of the TPC change varied from -53.7 mm to ＋58.8 mm in the most detrimental status is99.74%, therefore, the TPC remains in a safe condition. This paper puts forward that two-phase operation of the drive system should be adopted so as to reduce the maximum TPC change to -44.6 mm.展开更多
目的比较改良LIFT术与切开挂线引流术治疗复杂性肛瘘的临床疗效。方法选取本院收治的复杂性肛瘘患者108例,其中观察组54例采用改良LIFT术,对照组54例采用传统切开挂线引流术,比较两组疗效、疾病恢复、并发症和复发率等指标。结果观察组...目的比较改良LIFT术与切开挂线引流术治疗复杂性肛瘘的临床疗效。方法选取本院收治的复杂性肛瘘患者108例,其中观察组54例采用改良LIFT术,对照组54例采用传统切开挂线引流术,比较两组疗效、疾病恢复、并发症和复发率等指标。结果观察组治疗总有效率(98.15%)与对照组治疗总有效率(92.59%)比较差异不显著(P>0.05);观察组住院时间、切口愈合时间、切口愈合面积、愈后Wexner评分、术后7 d VAS评分均优于对照组(P<0.05);两组并发症发生率和复发率比较差异不显著(P>0.05)。结论相对于切开挂线引流术,改良LIFT术治疗复杂性肛瘘可有效缩短患者住院和切口愈合时间,减轻术后疼痛,并较好保留肛门功能。展开更多
A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connec...A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connector, the lifting pipe wiU only bear the axial force, free of moment. The strength of the connector is analyzed in detail, including the connecting strength of the buttress thread, the dynamic load of the pipe system, pressures inside and outside of the pipe, the lateral stress of the pipe wall and so on. Especially, a geometric model is built for 3-D contact stress analysis. The distribution graph of contact stress is presented. It is indicated that the strength of the spherical connector meets the demand.展开更多
文摘Thread lifting is one of the widely chosen procedures for minimally invasive facial rejuvenation. Traditional facial thread lifting has nearly inevitable side effects e.g. facial edema, facial bruising, prolonged recovery, skin puckering, and visible and/or palpable threads, as well as less common complications e.g. damage of facial vital structures. Applying the extrafacial loose areolar (XFLA) thread lifting technique by using loose areolar connective tissue, the fourth layer of the scalp, as insertion medium for the threads to be anchored to the layer above (epicranial aponeurosis or galea aponeurotica) and the layer below (pericranium), could help minimize most of the previously mentioned side effects. In this manuscript, technique steps will be detailed to prove its novelty.
基金We thank the National Natural Science Foundation of China(81660186/81160134)the Yunnan-Kunming Medical Joint Applied Basic Research Fund(Grant No.2017FE468-009)for funding support.
文摘Embedding thread lift rhytidectomy,also known as“thread lifting”in China,with the natures of simple operation,less trauma and quick recovery,is progressively used in clinical practice as a new technology of face lifting.Herewith,a brief introduction of the previous advances of thread lifting techniques and materials in the facial beauty industry,combined with the discussion on various types of sutures,common complications,and the site of actions were provided.The main limitations of present thread lifting material include:(1)the use of non-absorbable sutures is liable to cause allergies and a series of complications;(2)the absorbable sutures are easily degradation,and people need to reshape in a relatively short period.Therefore,the high biocompatible spider silk was proposed as a novel material of thread lifting suture and related devices,the advantages and preliminary achievements on spider silk were also addressed.
基金Supported by the Key Research Program of State Power Corporation(SPKJ016-06)the Key Scientific Research Project of Hubei Province(2004AC1O1D31)the Key Scientific Research Project of China Three Gorges Corporation(0722018)
文摘The Three Gorges Project（TGP） ship lift employs 4 safety mechanisms, of which one consists of a rotary locking screw and a nut jaw column. The thread pair clearance（TPC） of safety mechanisms is set at 60 mm. Owing to influential factors,the TPC changes randomly in the upward/downward-stroke of the ship chamber. If it diminished to 0, the safety mechanism would be jammed, thus resulting in disastrous accidents. By the bearing test of the drive system, 7 influential factors have been studied; 15 other influential factors（including 8 factors of manufacture and installation deviation, 3 factors of chamber offset, 2 factors of external load and 2 factors of wear） have been analyzed based on the design data. Results by the limit superposition reveal that the TPC change varies from -43.8 mm to ＋48.4 mm when the water level of the chamber ranges from 3.4 m to 3.6 m. According to the Gaussian distribution, the probability of the TPC change varied from -53.7 mm to ＋58.8 mm in the most detrimental status is99.74%, therefore, the TPC remains in a safe condition. This paper puts forward that two-phase operation of the drive system should be adopted so as to reduce the maximum TPC change to -44.6 mm.
文摘目的比较改良LIFT术与切开挂线引流术治疗复杂性肛瘘的临床疗效。方法选取本院收治的复杂性肛瘘患者108例,其中观察组54例采用改良LIFT术,对照组54例采用传统切开挂线引流术,比较两组疗效、疾病恢复、并发症和复发率等指标。结果观察组治疗总有效率(98.15%)与对照组治疗总有效率(92.59%)比较差异不显著(P>0.05);观察组住院时间、切口愈合时间、切口愈合面积、愈后Wexner评分、术后7 d VAS评分均优于对照组(P<0.05);两组并发症发生率和复发率比较差异不显著(P>0.05)。结论相对于切开挂线引流术,改良LIFT术治疗复杂性肛瘘可有效缩短患者住院和切口愈合时间,减轻术后疼痛,并较好保留肛门功能。
基金This research was financially supported by China Ocean Mineral Resources R &D Association (Grant No. DY105-03-02-17) .
文摘A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connector, the lifting pipe wiU only bear the axial force, free of moment. The strength of the connector is analyzed in detail, including the connecting strength of the buttress thread, the dynamic load of the pipe system, pressures inside and outside of the pipe, the lateral stress of the pipe wall and so on. Especially, a geometric model is built for 3-D contact stress analysis. The distribution graph of contact stress is presented. It is indicated that the strength of the spherical connector meets the demand.
