tourniquets

..During knee surgeries and many extremity procedures, tourniquets are used to create a blood-free operation field...

..An estimation method of AOP was developed [AOP = (systolic blood pressure + 10)/Tissue padding coefficient]. The new AOP estimation method may be a simple, rapid, and clinically practical alternative to the AOP determination method...

..Our study is the first to investigate the effect of the padding and the findings suggest that using more than two layers results in a significant reduction in the transmitted pressure...

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..Data suggest that relatively short periods of ischaemia activate a mediator cascade and cell-cell interactions that may be associated with adverse pathopyhsiological effects on peripheral tissues after prolonged ischaemia...

..Our results showed that handgrip training and intermittent compression of the upper arm veins, performed daily, increase the diameter of forearm arteries and veins and improve endothelium-dependent vasodilatation...

..In conclusions, ORB produced similar levels of tissue ischemia in murine models of limb I/R with fewer levels of nonspecific injury. ORB may be the preferred model for selected studies of limb I/R...

..In the development of therapeutic agents based on manipulation of the NO pathway, targeting the appropriate NOS isoenzymes may be important...

..Knee replacement surgery as a clinical model was useful during the ischaemia period, whereas the reperfusion period was dominated by the general changes seen postoperatively...

..One possible reason is the lack of feedback information in controlling posture, and the other is the altered control of the arm induced by the loss of tactile feedback...

..It is possible, that it can be caused by the rising thrombus...

..Therefore, the results have implications for future design of HNCS-related experimental and clinical studies...

..These results may have important implications for understanding the development of chronic diseases that involve mild ischaemic episodes...

..It is concluded that the ET-1 pathway is involved in acute ischemia and reperfusion and it may contribute to the muscle injury that occurs during surgical procedures...

..However, tourniquets are used successfully during total knee arthroplasty in elderly patients...

..2 mmHg, well below the 250 to 300 mmHg previously recommended. The technique consisted of inflating the tourniquet to a pressure of 300 mmHg, then reducing it to the calculated value. A bloodless field was maintained in all patients...

..CONCLUSIONS: The use of a tourniquet during transtibial amputation for severe PAD reduces blood loss and need for blood transfusion...

..It is our opinion that the use of the Esmarch bandage in hand surgery is unnecessary and recommend the crepe bandage as a safer alternative...

..Moreover, a pressure sensation can be elicited from deep tissue probably mediated by group III and IV afferents involving low-threshold mechanoreceptors...

..0. There was a good correlation between the location of damage and the location of high shear strain. It was concluded that the large deformations, in conjunction with ischemia, provided the main trigger for irreversible muscle damage...

..Thermodiffusion allows for on-line monitoring of muscle microcirculation, e.g., in compartment syndrome. The clinical potential of thermodiffusion measurements in trauma surgery needs further prospective evaluation...

..Postoperative tourniquet release seems to offer better conditions of haemostasis probably due to the better controlled fibrolytic activity...

..Early diagnosis and prompt surgical treatment are the keys to success in the treatment of this limb-threatening complication. Spontaneous resolution of the thrombus such as is reported in this case is exceptional...

..This may have important clinical implications for attempting venous cannulation in patients with difficult venous access...

..This is followed by a fall in intra-compartmental pressure for up to three hours. Tourniquet release and the ensuing hyperaemia does not appear to put the limb at risk of developing a compartment syndrome...

..One permanent and one transient complication occurred after tourniquet times of three hours. The incidence of tourniquet complications is still at least as high as that estimated in the 1970s...

..We hope this survey will raise awareness of the correct tourniquet pressures and change practice patterns based on "that's how we have always done it"...

..These results demonstrate that CASL is sensitive to flow heterogeneity between diverse muscle groups and that nonuniform hyperemic flow patterns following an ischemic paradigm correlate with relative fiber-type predominance...

..Expectation of a pain increase in the Nocebo group led to an increase in cortisol, but the expectation of pain increase and the resultant cortisol increase had no effect on pain...

..It was also suggested that the DNIC effect differs, depending on the intensity, kind, and quality of the test and conditioning stimuli...

..CONCLUSIONS: The enhanced oxidative stress due to ischemia-reperfusion appears to increase HNE in muscle and oxysterols by peroxidation not only in the gastrocnemius muscles but also in the kidneys and liver...

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..e. NP) and the reduction in the suppression of MSNA induced by baroreceptor stimulation (i.e. NS)...

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..TYPE OF STUDY/LEVEL OF EVIDENCE: Prognostic II...

Pneumatic tourniquets maintain a relatively bloodless field during extremity surgery, minimize blood loss, aid identification of vital structures, and expedite the procedure...

..The plasma TBARS level in the IP group was significantly lower than in the IP/IR group. CONCLUSION: IP pretreatment reduces lipid peroxidation and lung injury caused by lower limb IR...

..These findings indicate that counter irritation outside of the head and neck may be useful for increasing bite force, and may be applicable in the treatment of TMD for the restoration of masticatory muscle force...

..The induction of interleukin-6 expression is likely to play a role in the protection of injured neurons perhaps related to growth of their axons. Glycoprotein 130 might also account for the inhibitory effects following nerve injury...

..This implies a role for adenosine as both facilitatory mediator and a modulator of ischaemia skeletal muscle pain...

..CONCLUSIONS: NO is implicated in the ischemia/reperfusion pathology, but it is difficult to relate whether this is connected to cytochrome oxidase activity and malondialdehyde formation, also modified in this ischemia-reperfusion model...

..Furthermore, chronic ischemia-induced muscle atrophy was exacerbated by exercise training. This result implicates that exercise training could be detrimental to skeletal muscle with severely impaired microcirculation...

..The results indicated that low-intensity resistance exercise causes, in almost fully trained athletes, increases in muscle size, strength and endurance, when combined with vascular occlusion...

..Thus, ischemia associated with a modest decline in TO2 causes muscle fatigue...

..We recommend that tourniquet release be performed immediately after rFVIIa administration and that aggressive physical therapy be considered in the early postoperative period when rFVIIa infusions are frequent...

..04). Graft take was similar, 98.2% early and 98.1% later with tourniquet, with 98.2 and 96.8% take without (P>0.1). CONCLUSIONS: Tourniquet use in the unexsanquinated extremity reduced blood loss without affecting engraftment...

..No serious complications occurred on account of the vasopressin injection. We conclude that intraoperative vasopressin injection is effective as a hormonal tourniquet even in GnRH agonist-pretreated myomectomy...

..This difference was not significant. CONCLUSION: We conclude that tourniquet release for hemostasis is not an effective tool in reducing blood loss or transfusion need in total knee arthroplasty...

..CONCLUSIONS: Knee replacement trauma performed under ischaemia, is associated with modest systemic inflammatory reactions with no spillover of increased IL-6 from the traumatized area in the reperfusion phase...

..We conclude that two injections of TNA, one given preoperatively and one on deflation of the tourniquet, significantly reduce blood loss without increasing the risk of thromboembolic complications...

..Intraoperative tourniquet release and hemostasis does not reduce total blood loss in total knee arthroplasty...

..In the historical reference group, the number of blood transfusions increased as the volume of aspirate increased, and further if no adrenaline was added...

..The warranted conclusion is that square-wave exercise with inflated thigh cuffs stimulates a third phase of VO2 on-kinetics...

..The quality of the exsanguination was assessed by the surgeon using a pre-defined subjective scoring system. There were no significant differences in the exsanguination scores of the two treatment groups...

..CONCLUSION: This technique not only prevented massive bleeding from the accreted placentation, but also allowed physicians time to consider the necessity of subsequent hysterectomy...

..Operative complications with the bandage were not observed. Indications, important technical details and the results are critically discussed...

..71; P < 0.05); no significant correlations were found with pH or lactate levels. Thus it was shown here for the first time that ischemic stress may induce the release of beta-endorphin IRM from nonpituitary tissues...

..A review of published series of infrapopliteal bypass surgery is made. The experience of the authors during last decade with crural and pedal bypass surgery is analyzed...

..We report another probable cause that can be managed nonsurgically: vasospasm...