Intravenous tranexamic acid (TXA) has been shown
to be effective in reducing blood loss and the need for transfusion
after joint replacement. Recently, there has been interest in applying
it topically before the closure of surgical wounds. This has the
advantages of ease of application, maximum concentration at the
site of bleeding, minimising its systemic absorption and, consequently,
concerns about possible side-effects. We conducted a systematic review and meta-analysis which included
14 randomised controlled trials (11 in knee replacement, two in
hip replacement and one in both) which investigated the effect of
topical TXA on blood loss and rates of transfusion. Topical TXA
significantly reduced the rate of blood transfusion (total knee
replacement: risk ratio (RR) 4.51; 95% confidence interval (CI):
3.02 to 6.72; p <
0.001 (nine trials, I2 = 0%); total
hip replacement: RR 2.56; 95% CI: 1.32 to 4.97, p = 0.004 (one trial)).
The rate of thromboembolic events with topical TXA were similar
to those found with a placebo. Indirect comparison of placebo-controlled
trials of topical and intravenous TXA indicates that topical administration
is superior to the intravenous route. In conclusion, topical TXA is an effective and safe method of
reducing the need for blood transfusion after total knee and hip
replacement. Further research is required to find its optimum dose
for topical use. Cite this article:
Wound surveillance has been reported to result in a significant fall in the incidence of wound sepsis in total knee arthroplasty (TKA). However, there is currently little guidance on the definition of surgical wound infection that is best to be used for surveillance. The purpose of this study was to assess the agreement between three common definitions of surgical wound infection as a performance indicator in TKA; (a) the CDC 1992 definition, (b) the NINSS modification of the CDC definition and (c) the ASEPSIS scoring method applied to the same series of surgical wounds. A prospective study of 500 surgical wounds in patients who underwent knee arthroplasties between May 2002 and December 2004 from a single tertiary centre were assessed according to the different definitions of surgical wound infection.Introduction
Methods
Up to 2% of total hip arthroplasties (THA) are still complicated by infection. This leads to dissatisfied patients with poor function, and has far-reaching social and economic consequences. The challenge in these cases is the eradication of infection, the restoration of full function and the prevention of recurrence. We report the outcome of early aggressive debridement in the acutely infected THA. We studied 28 consecutive patients referred with acutely infected THA (18 primaries, 10 revisions) which occurred within 6 weeks of the index operation or of haematogenous spread between 1999 and 2006. Microbiology confirmed bacterial colonisation in all cases with 20 early post-operative infections and 8 cases of acute haematogenous spread. Patients with a cemented THA underwent aggressive open debridement, a thorough synovectomy and exchange of all mobile parts. Uncemented THA were treated as a single stage revision with removal of all implants, aggressive debridement and re-implantation of new prosthesis. Antibiotics were continued in all cases until inflammatory markers and the plasma albumin concentration returned to within normal limits.Introduction
Methods
Total knee replacements (TKR) are among the commonest operations performed in orthopaedic practice. Literature review showed that 10-30% of patients who underwent TKR needed 1-3 units of blood. Tranexamic acid (TXA) has been popularised as an effective way to reduce blood loss and subsequent blood transfusion. Our aim was to investigate the value of TXA in reducing blood loss and blood transfusion after TKR and other clinical outcomes such as deep venous thrombosis (DVT), pulmonary embolism (PE), ischaemic heart diseases and mortality. A systematic review and meta-analysis of published randomised and quasi-randomised trials which used TXA to reduce blood loss in knee arthroplasty were conducted.Introduction
Patients and Methods
To investigate the value of tranexamic acid (TA) in reducing blood loss and blood transfusion after TKR and other clinical outcomes such as deep venous thrombosis (DVT), pulmonary embolism (PE), ischaemic heart diseases and mortality. A systematic review and meta-analysis of published randomised and quasi-randomised trials which used TA to reduce blood loss in knee arthroplasty was conducted. The data was evaluated using the generic evaluation tool designed by the Cochrane Bone, Joint and Muscle Trauma Group.Objectives
Methods
Up to 2% of total knee arthroplasties (TKA) are still complicated by infection. This leads to dissatisfied patients with poor function, and has far-reaching social and economic consequences. The challenge in these cases is the eradication of infection, the restoration of full function and the prevention of recurrence. We report the outcome of prosthesis sparing early aggressive debridement in the acutely infected TKA. We studied 29 consecutive patients referred with acutely infected TKA (18 primaries, 11 revisions) which occurred within 6 weeks of the index operation or of haematogenous spread. Microbiology confirmed bacterial colonisation in all cases with 20 early post-operative infections and 9 cases of acute haematogenous spread. All patients underwent aggressive open debridement, a thorough synovectomy and a change of insert. Antibiotics were continued until inflammatory markers and the plasma albumin concentration returned to within normal limits.Introduction
Methods
We conducted a systematic review and meta-analysis
of randomised controlled trials evaluating the effect of tranexamic
acid (TXA) upon blood loss and transfusion in primary total knee
replacement. The review used the generic evaluation tool designed
by the Cochrane Bone, Joint and Muscle Trauma Group. A total of
19 trials were eligible: 18 used intravenous administration, one
also evaluated oral dosing and one trial evaluated topical use.
TXA led to a significant reduction in the proportion of patients
requiring blood transfusion (risk ratio (RR) 2.56, 95% confidence
interval (CI) 2.1 to 3.1, p <
0.001; heterogeneity I2 =
75%; 14 trials, 824 patients). Using TXA also reduced total blood
loss by a mean of 591 ml (95% CI 536 to 647, p <
0.001; I2 =
78%; nine trials, 763 patients). The clinical interpretation of
these findings is limited by substantial heterogeneity. However,
subgroup analysis of high-dose (>
4 g) TXA showed a plausible consistent
reduction in blood transfusion requirements (RR 5.33; 95% CI 2.44
to 11.65, p <
0.001; I2 = 0%), a finding that should
be confirmed by a further well-designed trial. The current evidence
from trials does not support an increased risk of deep-vein thrombosis
(13 trials, 801 patients) or pulmonary embolism (18 trials, 971
patients) due to TXA administration.
Literature review showed that 20–70% of patients who underwent THR needed 1–3 units of blood. Although safer than ever, allogeneic transfusion is still associated with risks for the recipient. There has been unsettled search for ways to reduce such blood loss and transfusion. Tranexamic acid has been popularised as an effective way to reduce blood loss and subsequent blood transfusion.
Blood loss
Seven studies (250 patients) were eligible for this outcome. Using Tranexamic acid reduced blood loss by an average of 155 ml (P-value <
0.00001, 95% CI (87–224), Heterogeneity I2 69 %.) Blood transfusion
Nine studies (463 patients) were eligible for this outcome. Tranexamic acid led to a reduction in the proportion of patients requiring blood transfusion (Odds Ratio of 0.35, P- value <
0.00001, 95% CI (0.22–0.55), Heterogeneity I2 25 %.) Other outcomes
There were no significant differences in the length of stay, DVT, PE, mortality, wound haematoma or infections between the study groups.
We report a systematic review and meta-analysis of published randomised controlled trials evaluating the efficacy of tranexamic acid (TXA) in reducing blood loss and transfusion in total hip replacement (THR). The data were evaluated using the generic evaluation tool designed by the Cochrane Bone, Joint and Muscle Trauma Group. We identified 11 clinical trials which were suitable for detailed extraction of data. There were no trials that used TXA in revision THR. A total of seven studies (comprising 350 patients) were eligible for the blood loss outcome data. The use of TXA reduced intra-operative blood loss by a mean of 104 ml (95% confidence interval (CI) −164 to −44, p = 0.0006, heterogeneity I2 0%), postoperative blood loss by a mean of 172 ml (95% CI −263 to −81, p = 0.0002, heterogeneity I2 63%) and total blood loss by a mean of 289 ml (95% CI −440 to −138, p <
0.0002, heterogeneity I2 54%). TXA led to a significant reduction in the proportion of patients requiring allogeneic blood transfusion (risk difference −0.20, 95% CI −0.29 to −0.11, p <
0.00001, I2 15%). There were no significant differences in deep-vein thrombosis, pulmonary embolism, infection rates or other complications among the study groups.
Since the era of total knee replacement (TKR) began in the late 1960s, total knee replacement has become one of the commonest operations in orthopaedic practice. TKR is frequently associated with transfusion of allogenic blood Benoni G 1995; Seppo T 1997. In our centre, 30 % of patients who had undergone TKR received allogenc blood transfusion perioperatively. Although, serological screening has reduced the risk for viral infection to a very low levelKlein HG 1995; Schreiber GB 1996, the public is still concerned about this potential serious complication. Allogenic blood transfusion can be also associated with other non infectious complications such as haemolysis, immunosuppression, transfusion-related acute lung injury and even death.Madjdpour C 2005 Therefore, further refinement of strategies to avoid exposure to allogeneic blood is needed. Amongst the technologies to minimise the need for blood transfusion is the use of the anti-fibrinolytic drugs aprotinin, tranexamic acid (TXA), and epsilon amino-caproic acid (EACA).New Reference