In this article, we will explore the topic of Compartment syndrome in depth. From its origins to its relevance today, we will analyze different aspects that will allow us to understand the importance of Compartment syndrome in different contexts. With a multidisciplinary approach, we will address both historical and contemporary aspects, as well as their influence in areas such as culture, society and technology. Throughout these pages, we will seek to discover new perspectives and reflect on the significance of Compartment syndrome in today's world.
Condition in which increased pressure results in insufficient blood supply
Medical condition
Compartment syndrome
A forearm following emergency surgery for acute compartment syndrome
Compartment syndrome is a serious condition [5]. Increased pressure in a body compartment can harm blood flow and tissue function [5][6][7]. If not treated quickly, it may cause permanent damage [7]. There are two types: acute and chronic[8]. Acute compartment syndrome can lead to a loss of the affected limb due to tissue death [6][9].
Symptoms of acute compartment syndrome (ACS) include severe pain, decreased blood flow, decreased movement, numbness, and a pale limb.[5] It is most often due to physical trauma, like a bone fracture (up to 75% of cases) or a crush injury.[3][6] It can also occur after blood flow returns following a period of poor circulation.[4] Diagnosis is clinical, based on symptoms, not a specific test.[5] However, it may be supported by measuring the pressure inside the compartment.[5] It is classically described by pain out of proportion to the injury, or pain with passive stretching of the muscles.[5] Normal compartment pressure should be 12-18 mmHg; higher is abnormal and needs treatment.[9] Treatment is urgent surgery to open the compartment.[5] If not treated within six hours, it can cause permanent muscle or nerve damage.[5][10]
Chronic compartment syndrome (CCS), or chronic exertional compartment syndrome, causes pain with exercise.[1] The pain fades after activity stops.[11] Other symptoms may include numbness.[1] Symptoms usually resolve with rest.[1] Running and biking commonly trigger CCS.[1] This condition generally does not cause permanent damage.[1] Similar conditions include stress fractures and tendinitis.[1] Treatment may include physical therapy or, if that fails, surgery.[1]
ACS is an emergency, and outcome largely depends on the time to diagnosis and treatment [12]. If treated within 3 hours, the prognosis is favorable [12]. Complications and permanent damage can occur [13].
Compartment syndrome usually presents within a few hours of an inciting event, but it may present anytime up to 48 hours after.[6] The earliest symptom is a tense, "wood-like" feeling in the affected limb.[5][6] There may also be decreased pulses, paralysis, and pallor, along with paresthesia.[15] Usually, NSAIDs cannot relieve the pain.[16] High compartment pressure may limit the range of motion[17] In acute compartment syndrome, the pain will not be relieved with rest.[8] In chronic exertional compartment syndrome the pain will dissipate with rest.[18]
Acute
There are five signs and symptoms of acute compartment syndrome.[6] They are known as the "5 Ps": pain, pallor, decreased pulse, paresthesia, and paralysis.[6] Pain and paresthesia are the early symptoms of compartment syndrome.[19][6]
Common symptoms are:
Pain: A person may feel pain greater than the exam findings.[6] This pain may not be relieved by strong painkillers, including opioids like morphine.[20] It may be due to nerve damage from ischemia.[6] A person may experience pain disproportionate to the findings of the physical examination.[21] The pain is aggravated by passively stretching the muscle group within the compartment.[21] However, such pain may disappear in the late stages of the compartment syndrome.[19]
Paresthesia (altered sensation): A person may complain of "pins and needles," numbness, and a tingling sensation. This may progress to loss of sensation (anesthesia) if no intervention is made.[19]
Uncommon symptoms are:
Paralysis: Paralysis of the limb is a rare, late finding.[5] It may indicate both a nerve or muscular lesion.[19]
Pallor: Pallor describes the loss of color to the affected limb.[8] Other skin changes can include swelling, stiffness, or cold temperature.[9]
Pulselessness: A lack of pulse rarely occurs in patients, as pressures that cause compartment syndrome are often lower than arterial pressures.[5] Absent pulses occur only with arterial injury or late-stage compartment syndrome, when pressures are very high.[5]
Chronic
Chronic exertional compartment syndrome, CECS, may cause pain, tightness, cramps, weakness, and numbness.[22] This pain can last for months or even years, but rest may relieve it.[23] There may also be mild weakness in the affected area.[11]
Exercise causes these symptoms.[24] They start with muscle tightness, then a painful burning if exercise continues.[24] After exercise stops, the compartment pressure will drop in a few minutes.[18] This will relieve the pain.[23] Symptoms will occur after a certain level of exercise.[11] This threshold can range anywhere from 30 seconds of running to 2–3 miles of running.[25] CECS most often occurs in the lower leg.[11] The anterior compartment is most affected.[11] Foot drop is a common symptom.[23][24]
Causes
Acute
Acute compartment syndrome (ACS) is a medical emergency.[5] It can develop after traumatic injuries, like car accidents, gunshot wounds, fractures, or intense sports.[26][26] Examples include a severe crush injury or an open or closed fracture of an extremity.[26] Rarely, ACS can develop after a minor injury or another medical issue.[12] It can also affect the thigh, buttock, hand, abdomen, and foot.[19][14] The most common cause of acute compartment syndrome is a fractured bone, usually the tibia.[14][27] Leg compartment syndrome occurs in 1% to 10% of tibial fractures.[6] It is strongly linked to tibial diaphysis fractures and other tibial injuries.[28] Direct injury to blood vessels can reduce blood flow to soft tissues, causing compartment syndrome.[26] Compartment syndrome can also be caused by:
Abdominal compartment syndrome occurs when the intra-abdominal pressure exceeds 20 mmHg and abdominal perfusion pressure is less than 60 mmHg.[33] There are many causes, which can be broadly grouped into three mechanisms: primary (internal bleeding and swelling); secondary (vigorous fluid replacement as an unintended complication of resuscitative medical treatment, leading to the acute formation of ascites and a rise in intra-abdominal pressure); and recurrent (compartment syndrome that has returned after the initial treatment of secondary compartment syndrome).[33][34]
Compartment syndrome after snake bite is rare.[35] Its incidence varies from 0.2 to 1.36% as recorded in case reports.[36] Compartment syndrome after a snake bite is more common in children.[35] Increased white blood cell count of more than 1,650/μL and aspartate transaminase (AST) level of more than 33.5 U/L are associated with developing compartment syndrome.[36] Otherwise, those bitten by venomous snakes should be observed for 48 hours to exclude the possibility of compartment syndrome.[36]
Acute compartment syndrome due to severe/uncontrolled hypothyroidism is rare.[37]
Chronic
When repeated use of the muscles causes compartment syndrome, it is chronic compartment syndrome (CCS).[38][39] This is usually not an emergency, but loss of circulation can damage nearby nerves and muscles.[39] The damage may be temporary or permanent.[38][39]
A subset of chronic compartment syndrome is chronic exertional compartment syndrome (CECS), often called exercise-induced compartment syndrome (EICS).[40] CECS is often a diagnosis of exclusion.[41] CECS of the leg is caused by exercise.[42] This condition occurs commonly in the lower leg and various other locations within the body, such as the foot or forearm.[11] CECS can be seen in athletes who train rigorously in activities that involve constant repetitive actions or motions.[40]
Pathophysiology
ACS is defined as a critical pressure increase within a confined compartmental space causing a decline in the perfusion pressure to the tissue within that compartment .[5] A normal human body needs a pressure gradient for blood flow.[43] It must go from the higher-pressure arterial system to the lower-pressure venous system.[5][43] This causes blood to back up.[5] Excess fluid leaks from the capillaries into the spaces between the soft tissue's cells.[44] This swells the extracellular space and raises the pressure in the compartment.[5][7] The swelling of the soft tissues around the blood vessels compresses the blood and lymphatic vessels.[7][43] This causes more fluid to enter the extracellular spaces, leading to further compression.[5] The pressure keeps rising due to the non-compliant fascia in the compartment.[5] This cycle can cause tissue ischemia, a lack of oxygen, and necrosis, or tissue death.[6][5][43]Paresthesia, or tingling, can start as early as 30 minutes after tissue ischemia begins.[45] Permanent damage can occur 12 hours after the injury starts.[45]
The reduced blood supply can trigger inflammation.[6] This can cause the soft tissues to swell.[5]Reperfusion therapy can worsen this inflammation.[5] The fascia that defines the limbs' compartments does not stretch.[6] Even a small bleed or muscle swelling can greatly raise the pressure.[8][6][5]
The pathophysiology of CECS is not entirely understood. In CECS, pressure in an anatomical compartment increases due to a 20% increase in muscle volume.[42] This builds pressure in the tissues and muscles, causing ischemia.[42] Increased muscle weight reduces the compartment volume of the surrounding fascial borders, raising compartment pressure.[40] An increase in the pressure of the tissue can force fluid to leak into the interstitial space (extracellular fluid), leading to a disruption of the micro-circulation of the leg.[40]
Diagnosis
Compartment syndrome is a clinical diagnosis.[14] It comes from a provider's exam and the patient's history.[5][14] Diagnosis may also require measuring intracompartmental pressure.[5][6] Using both methods increases the accuracy of diagnosing compartment syndrome.[46] A transducer connected to a catheter is inserted 5 cm into the zone of injury to measure the intracompartmental pressure.[9][5] Normal pressure is 10 mmHg.[5] Anything greater can compromise circulation, and 30 mmHg has been commonly cited as the upper threshold before circulation is lost.[5]
Noninvasive methods, like near-infrared spectroscopy (NIRS), show promise in controlled settings.[47] NIRS uses sensors on the skin.[47] However, with limited data, the gold standard for diagnosis is the clinical presentation and intracompartmental pressure.[47]
Chronic exertional compartment syndrome is often diagnosed by ruling out other conditions.[11][24] The key sign is that there are no symptoms when at rest.[1][48] The best test is to measure intracompartmental pressures after running, when symptoms return.[48][1] Tests like X-rays, CT scans, and MRIs help rule out other problems.[11] But they don't confirm compartment syndrome/[11] However, MRI is effective for diagnosing chronic exertional compartment syndrome.[49]
Treatment
Acute
Remove any external compression on the affected limb.[12] This includes tourniquets, orthopedic casts, or dressings.[12] Cutting the cast will reduce the intracompartmental pressure by 65%.[19] It will drop by 10 to 20% after cutting the padding.[19] After removal of the external compression the limb should be placed at the level of the heart.[50] The vital signs of the patient should be closely monitored.[19][50] If the condition does not improve, a fasciotomy is needed to decompress the compartments.[19][12][50] An incision large enough to decompress all the compartments is necessary.[5] This surgery is done in an operating theater under anesthesia.[5] There is debate over when to close the fasciotomy wound.[51] Some surgeons recommend closing wounds seven days after fasciotomy.[51] There are several methods to do this, like vacuum-assisted and shoelace techniques.[51] The vacuum-assisted one has led to longer hospital stays .[51] A skin graft may be needed to close the wound.[51] This would complicate treatment and require a much longer hospital stay.[51]
Fasciotomy is often overused for compartment syndrome from snake bites.[52][53][54] It may worsen prognosis.[52] Treat this compartment syndrome with antivenom.[55] Unlike other causes, fasciotomy is rarely needed.[55] If pressure stays high after antivenom, give more.[56] Measure compartment pressure before and after giving antivenom.[57] Only patients who do not respond to more antivenom should get a fasciotomy.[54][53][55][56]
Chronic
Chronic exertional compartment syndrome can be treated by:
Reducing or stopping exercise and other activities
Chronic compartment syndrome in the lower leg can be treated conservatively or surgically.[1][23] Avoid using devices that apply pressure, like splints, casts, or tight dressings.[58][24] If symptoms persist after basic treatment, or if someone wants to keep doing painful activities, compartment syndrome can be treated with surgery called fasciotomy.[59][48]
A 2012 US military study found that forefoot running reduced symptoms of anterior compartment syndrome.[60] The study focused on runners with chronic exertional compartment syndrome in their lower legs.[60] They reported that running with a forefoot strike limits use of the tibialis anterior muscle which may explain the relief in symptoms in those with anterior compartment syndrome.[60]
Case reports suggest that hyperbaric oxygen therapy may help with crush injury, compartment syndrome, and other acute ischemias.[60] It may improve wound healing and reduce the need for repeated operations.[61]
Prognosis
Researchers have reported a mortality rate of 47% for acute compartment syndrome of the thigh.[62] A study showed the fasciotomy rate for acute compartment syndrome ranges from 2% to 24%.[19] The key factor in acute compartment syndrome is the time to diagnosis and fasciotomy.[12] A missed or late diagnosis may require limb amputation to survive.[63][13] After a fasciotomy, some symptoms may be permanent.[13] It depends on which compartment was affected, the time until surgery, and muscle necrosis.[12][26] Muscle necrosis can happen fast, sometimes within just 3 hours after an injury.[13] A fasciotomy in the leg's lateral compartment might cause symptoms affecting nearby nerves and muscles.[10] These may include foot drop, numbness along leg, numbness of big toe, pain, and loss of foot eversion.[10]
In a case series of 164 people with acute compartment syndrome, 69% had an associated fracture.[70] The article's authors found that the yearly rate of acute compartment syndrome is 1 to 7.3 cases per 100,000 people.[70] It varies greatly by age and gender in trauma.[14] Men are ten times more likely than women to get ACS.[6] The mean age for ACS is 30 in men and 44 in women.[19] People under 35 may get ACS more often.[6][5] This is likely because they have more muscle mass.[5][6] The anterior compartment of the leg is where ACS usually happens.[6][71]
Special Population
Children with Compartment Syndrome
The pathophysiology of acute compartment syndrome in children is the same as adults [72]. However, cases are complicated by challenges in examination and communication with pediatric patients [72]. Children may not be able to effectively report their pain symptoms [73]. In addition, it can take longer to develop high pressures in pediatric compartments [73][74]. Besides the "5 Ps," the "3 As" can diagnose compartment syndrome in children: increasing anxiety, agitation, and analgesic needs [75]. Normal compartment pressures in children are typically higher than adults [76]. The most common cause of compartment syndrome in children is traumatic injury [77]. In children <10 years of age, the cause is usually vascular injury or infection [78]. In children >14 years of age, the cause is usually due to trauma or surgical positioning [79]. Treatment for compartment syndrome in children is the same as adults [72].
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