Compartment syndrome, a devastating consequence of limb trauma, is characterised by severe tissue injury and microvascular perfusion deficits. We hypothesised that leucopenia might provide significant protection against microvascular dysfunction and preserve tissue viability. Using our clinically relevant rat model of compartment syndrome, microvascular perfusion and tissue injury were directly visualised by intravital video microscopy in leucopenic animals. We found that while the tissue perfusion was similar in both groups (38.8% (standard error of the mean (. sem). 7.1). , 36.4. % (. sem. 5.7), 32.0% (. sem. 1.7), and 30.5% (. sem. 5.35) continuously-perfused capillaries at 45, 90, 120 and 180 minutes compartment syndrome, respectively versus 39.2% (. sem. 8.6), 43.5% (. sem. 8.5). , . 36.6% (. sem. 1.4) and 50.8% (. sem. 4.8) at 45, 90, 120 and 180 minutes compartment syndrome, respectively in leucopenia), compartment syndrome-associated muscle injury was significantly decreased in leucopenic animals (7.0% (. sem. 2.0), 7.0%, (. sem. 1.0), 9.0% (. sem. 1.0) and 5.0% (. sem. 2.0) at 45, 90, 120 and 180 minutes of compartment syndrome, respectively in leucopenia group versus 18.0% (. sem. 4.0), 23.0% (. sem. 4.0), 32.0% (. sem. 7.0), and 20.0% (. sem. 5.0) at 45, 90, 120 and 180 minutes of compartment syndrome in control, p = 0.0005). This study demonstrates that the inflammatory process should be considered central to the understanding of the pathogenesis of cellular injury in compartment syndrome. Cite this article: Bone Joint J 2015;97-B:539–43

In this work, we propose a new quantitative way of evaluating acute compartment syndrome (ACS) by dynamic mechanical assessment of soft tissue changes. First, we have developed an animal model of ACS to replicate the physiological changes during the condition. Secondly, we have developed a mechanical assessment tool for quantitative pre-clinical assessment of ACS. Our hand-held indentation device provides an accurate method for investigations into the local dynamic mechanical properties of soft tissue and for in-situ non-invasive assessment and monitoring of ACS. Our compartment syndrome model was developed on the cranial tibial and the peroneus tertius muscles of a pig's leg (postmortem). The compartment syndrome pressure values were obtained by injecting blood from the bone through the muscle. To enable ACS assessment by a hand-held indentation device we combined three main components: a load cell, a linear actuator and a 3-axis accelerometer. Dynamic tests were performed at a frequency of 0.5 Hz and by applying an amplitude of 0.5 mm. Another method used to observe the differences in the mechanical properties inside the leg was a 3D Digital Image Correlation (3D-DIC). Videos were taken from two different positions of the pig's leg at different pressure values: 0 mmHg, 15 mmHg and 40 mmHg. Two strains along the x axis (Exx) and y axis (Eyy) were measured. Between the two pressure cases (15 mmHg and 40 mmHg) a clear deformation of the model is visible. In fact, the bigger the pressure, the more visible the increase in strain is. In our animal model, local muscle pressures reached values higher than 40 mmHg, which correlate with observed human physiology in ACS. In our presentation we will share our dynamic indentation results on this model to demonstrate the sensitivity of our measurement techniques. Compartment syndrome is recognised as needing improved clinical management tools. Our approach provides both a model that reflects physiological behaviour of ACS, and a method for in-situ non-invasive assessment and monitoring

Introduction. Compartment syndrome can be a life changing consequence of injury to a limb. If not diagnosed and treated early it can lead to permanent disability. Neurovascular observations done on the ward by nursing staff, are often our early warning system to those developing compartment syndrome. But are these adequate for detecting the early signs of compartment syndrome? Our aim was to compare the quality and variability of charts across the UK major trauma network. Materials & Methods. All major trauma centres in England and Scotland were invited to supply a copy of the neurovascular chart routinely used. We assessed how such charts record relevant information. Specific primary data points included were pain scores, analgesia requirements, pain on passive stretch and decreased sensation in the first web space specifically. As secondary objectives, we assessed how late signs were recorded, whether clear instructions were included, quantitative scores and the use of regional blocks recorded. Results. A response rate of 46% was achieved. Of the charts reviewed, 25% documented pain scores or pain on passive movement. Pain on movement and analgesia requirements were documented in 33% and 8% respectively. Specific sensation within the 1. st. webspace was recorded in 16%. No charts recorded use of regional block. All charts recorded global sensation, movement (unspecified), pulse and colour whilst 66% documented capillary refill and 83% temperature. Instructions were included in 41% of charts. Conclusions. In 2016, the BOA supported publication of an observation chart for this purpose however, it is not widely used. In our study, late signs of compartment syndrome were generally well recorded. However, documentation of early signs and regional blocks was poor. This may lead to delays in diagnosis with significant clinical and medicolegal consequences. Standardisation of documentation by updating and promoting the use of the pre-existing chart would ensure highest quality care across the network

Aims. Compartment syndrome results from increased intra-compartmental pressure (ICP) causing local tissue ischaemia and cell death, but the systemic effects are not well described. We hypothesised that compartment syndrome would have a profound effect not only on the affected limb, but also on remote organs. Methods. Using a rat model of compartment syndrome, its systemic effects on the viability of hepatocytes and on inflammation and circulation were directly visualised using intravital video microscopy. Results. We found that hepatocellular injury was significantly higher in the compartment syndrome group (192 PI-labelled cells/10. -1 . mm. 3. , standard error of the mean (. sem. ) 51) compared with controls (30 PI-labelled cells/10. -1 . mm. 3. , . sem . 12, p < 0.01). The number of adherent venular white blood cells was significantly higher for the compartment syndrome group (5 leukocytes/30s/10 000 μm. 2. , . sem 1. ) than controls (0.2 leukocytes/30 s/10 000 μm. 2. , . sem . 0.2, p < 0.01). Volumetric blood flow was not significantly different between the two groups, although there was an increase in the heterogeneity of perfusion. Conclusions. Compartment syndrome can be accompanied by severe systemic inflammation and end organ damage. This study provides evidence of the relationship between compartment syndrome in a limb and systemic inflammation and dysfunction in a remote organ. Cite this article: Bone Joint J 2016; 98-B:1132–7

Compartment syndrome of the foot is usually associated with trauma, and if untreated may result in deformity and loss of function. We report a case of spontaneous compartment syndrome of the foot presenting with severe unremitting pain. The diagnosis was supported by measurements of compartment pressures and the symptoms resolved after surgical decompression. Spontaneous compartment syndrome in the leg has been described in a small number of cases, but there has been no previous report involving the foot. We believe that this case highlights the importance of suspecting a spontaneous compartment syndrome of the foot if the appropriate symptoms are present but there is no clear cause. We also believe that compartment pressure measurement assists in the decision to undertake surgical decompression

We present two rare variations related to compartment syndrome. The first is a 69-year-old hypertensive man with compartment syndrome of the arm. The second is a 58-year-old man with compartment syndrome of the forearm with severe compensatory hypertension

Purpose of the study: We noted that four postoperative compartment syndromes observed in our department occurred in short stature patients with micromely secondary to chondrodysplasia. This complication occurred in young subjects with significant muscular development (two with intensive sports practice) whose muscle hypertrophy appeared exaggerated by the short length of the limbs. Material and methods: The first case concerned a young man with pycnodysostosis who developed a tibial compartment syndrome after prolonged ventral decubitus subsequent to spinal surgery. No surgical procedure had been performed on the lower limb. The complication was probably triggered by simple compression of the proximal portion of the limb leading to elevated venous pressure and rapid self-aggravating muscular atrophy in a small aponeurotic compartment. The second case was a female patient with metaphyseal dysplasia who during adolescence had undergone corrective bilateral tibial osteotomy to align the lower limbs. Preventive aponeurotomy had been performed which left on one side a disgraceful muscle herniation. Aponeurotic plasty had been performed in adulthood to reconstitute the tibial compartment. A compartment syndrome developed in the immediate postoperative period. The third case was a young adult with hypochondroplasia who developed bilateral crural compartment syndrome 24 hours after femoral osteotomy with implantation of an external fixator for lower limb lengthening. Results: Sequelae were observed in only one of these four cases of compartment syndrome (patient n° 1). Extensive necrosis of the tibialis anterior was observed due to late diagnosis, leading to legal implications and a court suit. Emergency treatment was given in the three other cases and no sequelae were observed. Discussion: These patients with chondrodysplasia and micromely appeared to be predisposed to postoperative compartment syndrome because of the relative muscle hypertrophy and the narrow muscle compartments. The risk of this complication in small stature patients warrants the use of preventive aponeurotomy during orthopedic procedures involving the limbs and implies rigorous postoperative surveillance for early detection. Systematic aponeurotomies should be extended over the entire length of the muscle compartment involved in order to achieve effective decompression and avoid disgraceful localized muscle herniation

Aims. Identifying predictors of compartment syndrome in the foot after a fracture of the calcaneus may lead to earlier diagnosis and treatment. The aim of our study was to identify any such predictors. Patients and Methods. We retrospectively reviewed 303 patients (313 fractures) with a fracture of the calcaneus who presented to us between October 2008 and September 2016. The presence of compartment syndrome and potential predictors were identified by reviewing their medical records. Potential predictors included age, gender, concomitant foot injury, mechanism of injury, fracture classification, time from injury to admission, underlying illness, use of anticoagulant/antiplatelet agents, smoking status and occupation. Associations with predictors were analyzed using logistic regression analysis. Results. Of the 313 fractures of the calcaneus, 12 (3.8%) developed a compartment syndrome. A Sanders type IV fracture was the only strongly associated factor (odds ratio 21.67, p = 0.007). Other variables did not reach statistical significance. Conclusion. A Sanders type IV fracture is the best predictor of compartment syndrome after a fracture of the calcaneus. Cite this article: Bone Joint J 2018;100-B:303–8

Systemic capillary leak syndrome, or the Clarkson syndrome, is an extremely rare condition in which increased capillary permeability results in a massive shift of fluid into the extravascular space. This is followed rapidly by hypotensive shock, haemoconcentration, and, potentially, substantial oedema of the limbs resulting in an acute compartment syndrome. It is important for orthopaedic surgeons to be aware of this syndrome as our medical colleagues, who initially care for these patients, are less familiar with the diagnosis and the need for emergency management of the associated compartment syndrome should it develop. There have been fewer than 100 cases of this entity reported. This case report is the first to describe the subsequent development of a compartment syndrome in all four limbs. Clinical vigilance and continuous monitoring of intracompartmental pressure is necessary in these patients in order to help reduce limb-threatening complications

Injury to the perforating branch of the peroneal artery has not been reported previously as a cause of acute compartment syndrome following soft-tissue injury to the ankle. We describe the case of a 23-year-old male who sustained such an injury resulting in an acute compartment syndrome. In a review of the literature, we could find only five previous cases, all of which gave rise to a false aneurysm which was detected after the acute event

Purpose: Compartment syndrome is a limb-threatening condition. Treatment is urgent decompression by fas-ciotomy. However, orthopedic surgeons are often confronted by a limb at risk for compartment syndrome, in which treatments to preserve tissue might be considered. Hypothermia has shown promise as a technique of maintaining tissue viability in transplant surgery, replant surgery and soft tissue injury. Cooling reduces microvascular dysfunction, inflammation and edema. This study was designed to determine whether tissue cooling might reduce muscle damage in the setting of elevated intracompartmental pressure. Purpose This study investigated the effect of hypothermia on tissue perfusion, viability and the inflammatory response in an animal model of elevated intracompartmental pressure. We hypothesize that hypothermia will preserve muscle tissue viability in an animal model of elevated intracom-partmental pressure. Method: Twenty Wistar rats were randomized. Five animals had elevated intracompartmental pressure for 2 hours (CS). Five had elevated pressure and hindlimb cooling to 25oC (CS-HY). Five had hindlimb cooling to 25oC (HY) and 5 were control animals (C). All animals were anaesthesized for study. Core temperature was maintained over 30oC. Elevated ICP was maintained (30mmHg) using a saline infusion technique (groups CS and CS-HY). After 2 hours, fasciotomies were completed and intravital microscopy was used to measure tissue viability, microvascular perfusion and inflammation. Results: The use of hypothermia reduced tissue damage by approximately 50% in the CS-HY group (8.2% injured cells) compared with the CS group (16.5% injured cells). There was no difference in capillary perfusion comparing the CS and CS-HY groups (p> 0.05). The number of adherent inflammatory cells was fewer comparing the CS-HY with the CS groups, but this did not reach statistical significance with the numbers available for study. Conclusion: Hypothermia preserved tissue viability in an animal model of elevated intracompartmental pressure. Fasciotomy remains the gold standard treatment for established compartment syndrome. However cooling may be useful to preserve tissue viability in extremities that are at risk of developing compartment syndrome. The clinical utility of hypothermia for compartment syndrome requires further study

Acute Compartment Syndrome (ACS) is an orthopaedic emergency that can develop after a wide array of etiologies. In this pilot study the MY01 device was used to assess its ease of use and its ability to continuously reflect the intracompartmental pressure (ICP) and transmit this data to a mobile device in real time. This preliminary data is from the lead site which is presently expanding data collection to five other sites as part of a multi-center study. Patients with long bone trauma of the lower or upper extremity posing a possibility of developing compartment syndrome were enrolled in the study. Informed consent was obtained from the patients. A Health Canada licensed continuous compartmental pressure monitor (MY01) was used to measure ICP. The device was inserted in the compartment that was deemed most likely to develop ACS and ICP was continuously measured for up to 18 hours. Fractures were classified according to the AO/OTA classification. Patient clinical signs and pain levels were recorded by healthcare staff during routine in-patient monitoring and were compared to the ICP from the device. Important treatment information was pulled from the patient's chart to help correlate all of the patient's data and symptoms. The study period was conducted from November 2020 through December 2021. Twenty-six patients were enrolled. There were 17 males, and nine females. The mean age was 38 years (range, 17–76). Seventeen patients received the device post-operatively and nine received it pre-operatively. Preliminary results show that post-operative ICPs tend to be significantly higher than pre-operative ICPs but tend to trend downwards very quickly. The trend in this measurement appears to be more significant than absolute numbers which is a real change from the previous literature. One patient pre-operatively illustrated a steep trend upwards with minimal clinical symptoms but required compartment release at the time of surgery that exhibited no muscle necrosis. The trend in this patient was very steep and, as predicted, predated the clinical findings of compartment syndrome. This trend allows an early warning signal of the absolute pressure, to come, in the compartment that is being assessed by the device. Preliminary results suggest that this device is reliable and relatively easy to use within our institutions. In addition it suggests that intracompartmental pressures can be higher immediately post-op but lower rapidly when the patient does not develop ACS. These results are in line with current literature of the difference between pre and post-operative baselines and thresholds of ICP, but are much more striking, as continuous measurements have not been part of the data set in most of past studies. Further elucidation of the pressure thresholds and profiles are currently being studied in the ongoing larger multicenter study and will add to our understanding of the critical values. This data, plus the added value of continuous trends in the pressure, upwards or downwards, will aid in preventing muscle necrosis during our management of these difficult long bone fractures

We have analysed associated factors in 164 patients with acute compartment syndrome whom we treated over an eight-year period. In 69% there was an associated fracture, about half of which were of the tibial shaft. Most patients were men, usually under 35 years of age. Acute compartment syndrome of the forearm, with associated fracture of the distal end of the radius, was again seen most commonly in young men. Injury to soft tissues, without fracture, was the second most common cause of the syndrome and one-tenth of the patients had a bleeding disorder or were taking anticoagulant drugs. We found that young patients, especially men, were at risk of acute compartment syndrome after injury. When treating such injured patients, the diagnosis should be made early, utilising measurements of tissue pressure

Purpose: Since the advent of pinning for supracondylar fractures of the humerus, Volkmann syndrome has been exceptional and most of the posttraumatic compartment syndromes observed in children have been seen in the lower limb. We propose an analysis of the causes, the diagnosis, the treatment and the results of treatment of acute posttraumatic compartment syndrome of the leg in children. Material and methods: Twenty-eight consecutive cases of acute posttraumatic compartment syndrome in 27 children were reviewed. These children were treated in two American paediatric traumatology units over a ten year period. We evaluated the cause of the trauma, associated lesions, clinical course, diagnostic methods, muscle compartment pressures, time from accident to diagnosis, and time from accident to surgery. Results were analysed at last follow-up. Results: The study population was 24 boys and three girls, aged 4 months to 15 years. Twenty-four children were pedestrian traffic accident victims. Twenty-two had a tibial fracture, four a femoral fracture, and two no fracture. Twenty-five compartment syndromes were diagnosed on the basis of compartment pressure measurements. Mean time from accident to diagnosis was 19 hours (range 2.5–85 hr). At diagnosis, exacerbated pain was observed in 26 children, paraesthesia in eleven, motor deficit in seven, and diminished pulses in three. Mean time from accident to surgery was 21 hours. Mean follow-up was 15 months. The final outcome was remarkably good. At last follow-up, 24 children were pain free, with no functional or sensorial deficit. Aponeurotomy had been performed very late (43, 83, and 86 hr) in the three patients who developed functional deficit. There were no cases of infection even when surgery was performed late. Discussion: Most children treated for acute posttraumatic compartment syndrome achieve a good result even when the time from accident to treatment is long, often more than 12 hours. All patients with sequellae at the last follow-up in our series had undergone aponeurotomy more than 36 hours after the accident. Conclusion: This is the first series devoted exclusively to acute posttraumatic compartment syndrome of the leg in children. The results were generally good despite significant time from accident to treatment

The aim of this study was to document our experience of acute forearm compartment syndrome, and to determine the risk factors for requiring split skin grafting (SSG) and developing complications post fasciotomy. We identified from our trauma database all patients who underwent fasciotomy for an acute forearm compartment syndrome over a 22-year period. Diagnosis was made using clinical signs and/or compartment pressure monitoring. Demographic data, aetiology, management, wound closure, complications and subsequent surgeries were recorded. Outcome measures were the use of SSG and the development of complications following forearm fasciotomy. 90 patients were identified with a mean age of 33 yrs (range, 13–81 yrs) and a significant male predominance (n=82, p<0.001). A fracture of one or both of the forearm bones was seen in 62 (69%) patients, with soft tissue injuries causative in 28 (31%). The median time to fasciotomy was 12hrs (2–72). Delayed wound closure was achieved in 38 (42%) patients, with 52 (58%) undergoing SSG. Risk factors for requiring a SSG were younger age and a crush injury (both p<0.05). Complications occurred in 29 (32%) patients at mean follow-up of 11 (3–60) months. Risk factors for developing complications were a delay in fasciotomy of >6 hrs (p=0.018), with pre-operative motor symptoms approaching significance (p=0.068). Forearm compartment syndrome requiring fasciotomy predominantly affects males and can occur following either a fracture or soft tissue injury. Age is an important predictor of undergoing SSG for wound closure. Complications occur in a third of patients and are associated with an increasing delay in the time to fasciotomy

A total absence of acute compartment syndrome (ACS) was noted in 966 tibial fractures in African patients of diverse ethnic groups, reviewed retrospectively at our institution. According to general incidences reported in the literature, we should have experienced between 22 and 86 cases of acute compartment syndrome. The purpose of this prospective study was to confirm these findings and at the same time to try to find an explanation for this phenomenon. During a period of 1 year and 4 months, 257 tibial fractures were prospectively analyzed for clinical signs and late sequelae of acute compartment syndrome. In 156 of these patients, presenting 158 fractures of the tibia, the pressure in the anterior compartment was systematically measured. Not a single case, nor late sequel of ACS was diagnosed. The hypothesis we forward for this total absence of ACS is the effect of chronic high temperature surroundings in preventing ACS by safeguarding the arteriovenous gradient and lowering the vascular resistance. We propose that further investigation should be carried out to study this hypothesis

Purpose: Compartment syndrome is a severe complication of skeletal trauma. Intravital microscopy (IVVM) has demonstrated an inflammatory response to compartment syndrome (CS). The molecular mechanisms underlying this inflammatory response are unknown. The purpose of this study was threefold. First, a broad inflammatory cytokine profile was examined to determine the molecules responsible for white cell recruitment. As well, skeletal muscle expression of white cell adhesion molecules including P-Selectin, E-Selectin, Mac-1 and ICAM-1 were examined to assess the extent of white cell activation in target tissues. Finally, skeletal muscle apoptosis was measured to determine the magnitude of cell death. Method: Normal and neutropenic rats were randomised to either compartment syndrome or control groups. CS Animals were treated with 45 minutes of elevated intra-compartmental pressure (EICP) of the hindlimb. Fasciotomy was then performed, followed by 60 minutes of reperfusion. Control animals experienced no EICP. Blood was collected from carotid arterial lines used for pressure monitoring. Skeletal muscle tissue samples were collected from the EDL following reperfusion. Blood samples were obtained from carotid arterial lines and skeletal muscle was collected following reperfusion. A Multiplex assay was used to examine serum levels of 24 proinflammatory cytokines/chemokines. Skeletal muscle mRNA levels of P-Selectin, E-Selectin, Mac-1 and ICAM-1 were evaluated using real-time PCR. Finally, skeletal muscle apoptosis was measured by DNA laddering and a caspase-3 assay. Results: Neutropenic CS animals demonstrated a continuous increase in TNF-alpha levels, peaking at 700+/−350pg/ml by 60 minutes of reperfusion. TNF-alpha values for other groups did not increase. A 104-fold increase in ICAM-1 mRNA levels was observed in neutropenic CS rats while other groups showed no significant increase. There was no significant increase in any group for P-Selectin, E-Selectin, or Mac-1. Conclusion: This study is the first to attempt to describe the molecular inflammatory response in CS. Neutropenic CS animals demonstrated an upregulation in TNF-alpha and ICAM-1 mRNA levels. This likely represents an attempt to generate an inflammatory response in the neutropenic animals. Additional data at incremental timepoints is necessary to further characterize the molecular mechanisms. However, both TNF-alpha and ICAM-1 appear to be important in the mechanism of inflammatory activation in compartment syndrome

Purpose: Indomethacin may preserve tissue viability in compartment syndrome. The mechanism of improved tissue viability is unclear, but the anti-inflammatory effects may alter the relative contribution of tissue necrosis versus apoptosis to cellular injury. Existing studies have only considered indomethacin administration prior to induction of compartment syndrome. The purpose of this study was to determine the effect of timing of indomethacin administration on muscle damage in compartment syndrome, and to assess apoptosis as a cause of tissue demise. Method: Twenty-four Wistar rats were randomized to elevated intracompartmental pressure (EICP) for either 45 or 90 minutes (30mm Hg). In the 45 min group, indomethacin was withheld (group 1), given prior to induction of EICP (group 2) or given 15 min prior to fasciotomy (group 3). In the 90 min group, indomethacin was withheld (group 4) or provided 30 or 60 minutes prior to fasciotomy (groups 5 and 6). Intravital microscopy and histochemical staining assessed capillary perfusion, cell damage and inflammatory activation within EDL muscle. Apoptosis was assessed using ELISA staining for caspase-3. Groups were compared with one-way ANOVA (p< 0.05). Results: Perfusion improved in indomethacin-treated groups. Nonperfused capillaries decreased from group 1 (50.1±2.5), to groups 2 (38.4±1.8) and 3 (14.13±1.73)(p< 0.0001). Similarly, groups 5 and 6 had 25% fewer non-perfused capillaries compared to group 4 (p< 0.0001). Tissue viability improved in indo-methacin-treated groups. Groups 2 and 3 showed fewer damaged cells (1±0.5% and 8.7±2%) compared to group 1 (20±14%)(p< 0.0001). Groups 5 and 6 showed decreased cell damage (13±1% and 11±1%) compared to group 4 (18±1%) (p< 0.01). Apoptotic activity was present in compartment syndrome. At 30 minutes there were elevated caspase levels in EICP groups (0.47±0.08) compared to controls (0.19±0.02). However, indomethacin treated groups did not differ from controls with regards to caspase levels (p> 0.05). Conclusion: Indomethacin decreased cell damage and improved perfusion in compartment syndrome. The benefits of indomethacin were partially time dependent; some improvement in tissue viability occurred regardless of timing of administration. Although apoptosis was common in compartment syndrome, the protective effect of indomethacin does not appear to be related to apoptosis

Aim. To review current military orthopaedic experience and establish if there exists a consensus of opinion in how and if to perform fasciotomy of the foot and to guide other clinicians. Method. A questionnaire was sent to 10 DMS orthopaedic consultants to identify their experience with foot compartment syndrome and performing fasciotomies. Results. 50% had performed a foot fasciotomy (average 2, range 1-6) over an average of 6.2 years as consultant and an average of 7.3 months deployed. Most commonly two dorsal and a medial incision were used to decompress the foot, while one advocated not decompressing and accepting the contractures, a view consistent with some civilian literature. Discussion. The debate surrounding decompression stems from the rarity of the condition, the lack of consensus regarding the anatomy of the foot compartments and whether to accept the inevitable contractures by not decompressing. Given that foot compartment syndrome may not be seen during civilian training, then there is a requirement for guidance for the deploying military surgeon. Conclusion. DMS clinicians need to remain vigilant to compartment syndrome of the foot and especially in cases of crush or blast injury or of multiple fractures. If diagnosed or even if an impending compartment syndrome is suspected then the foot should be decompressed and the deployed orthopaedic surgeon should be capable of performing it

The detection and treatment of acute compartment syndrome following trauma is critical if contractures, delayed fracture healing and possible amputations are to be avoided. The current standard for monitoring relies on invasive compartment pressure measurements. These require an additional procedure and cause discomfort to the patient. This prospective clinical study investigates the relationship between the intra-compartmental pressure and soft tissue oxygenation (%StO. 2. ) measured non-invasively by near-infrared spectroscopy (NIRS) in patients at risk of acute compartment syndrome. Adults with acute tibial or radial diaphyseal fractures were recruited on admission to the orthopaedic trauma unit. Non-invasive and invasive monitoring over anterior tibial or volar forearm compartments was carried out from admission and continued post-operatively. The differential pressure (ΔDP) was calculated as the compartment pressure subtracted from the diastolic blood pressure. The threshold for fasciotomy was a ΔDP < 30mmHg. StO. 2. values were simultaneously recorded from the contralateral (uninjured) limb at the same site. All patients had the difference between the StO. 2. value on the injured and uninjured sides calculated (‘StO. 2. difference’). Sixty patients with tibial fractures and 5 patients with forearm fractures were recruited. The mean age was 39 years (S.D.18 years). Fourteen patients underwent a four-compartment lower leg fasciotomy determined by a ΔDP < 30mmHg. We have observed that the difference in StO. 2. between limbs (measured non-invasively) was significantly lower in patients undergoing a fasciotomy. This suggests that NIRS is able to detect a change in oxygenation of the soft tissues in trauma patients developing an acute compartment syndrome. We are optimistic that near-infrared spectroscopy (NIRS) will be a reliable new non-invasive technique for detection of an acute compartment syndrome