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Septic Thrombophlebitis

  • Author: Nicholas Connors, MD; Chief Editor: Jeter (Jay) Pritchard Taylor, III, MD  more...
 
Updated: Jun 15, 2016
 

Background

Septic thrombophlebitis is a condition characterized by venous thrombosis, inflammation, and bacteremia.[1] The clinical course and severity of septic thrombophlebitis are quite variable. Many cases present as benign, localized venous cords that resolve completely with minimal intervention. Some cases present as severe systemic infections culminating in profound shock that is refractory to aggressive management, including operative intervention and intensive care. (See Presentation and Prognosis.)

A number of distinct clinical conditions have been identified, depending on the vessel involved, but all thrombophlebitides involve the same basic pathophysiology. Thrombosis and infection within a vein can occur throughout the body and can involve superficial or deep vessels. Notable examples are thrombophlebitis in the following (see Etiology):

  • Peripheral veins
  • Pelvic veins
  • Portal vein (pylephlebitis)
  • Superior vena cava (SVC) or inferior vena cava (IVC)
  • Internal jugular vein (Lemierre syndrome)
  • Dural sinuses

The approach to treatment of septic phlebitis depends on which structures are involved, the underlying etiology of the phlebitis, the causative organisms, and the patient's underlying physiology. (See Treatment and Medication.)

Peripheral septic thrombophlebitis is a common problem that can develop spontaneously but more often is associated with breaks in the skin. Though most commonly caused by indwelling catheters, septic thrombophlebitis may also result from simple procedures such as venipuncture for phlebotomy and intravenous injection. While infection must always be considered, catheter-related phlebitis can result from sterile chemical or mechanical irritation. (See Etiology.)

Septic phlebitis of a superficial vein without frank purulence is known as simple phlebitis. Simple phlebitis is often benign, but when it is progressive, it can cause serious complications, and even death.

Suppurative superficial thrombophlebitis is a more serious condition that can lead to sepsis and death, even with appropriate aggressive intervention.[2] A frequent complication is embolization of infected thrombus to distant sites, most commonly the lungs, leading to septic pulmonary emboli, hypoxia, sepsis, and often death.[3] Patient factors such as burns,[4] steroid usage,[5] or intravenous drug use[3] increase the risk of developing septic phlebitis and its complications.

Septic phlebitis of the deep venous system is a rare, but life-threatening, emergency that may fail to respond to even the most aggressive therapy. Any vessel can theoretically be involved, but the more common entities are detailed below.

Septic thrombophlebitis of the IVC or SVC is primarily the result of central venous catheter placement, with increased incidence in burn patients and those receiving total parenteral nutrition.[6] Patients are generally very ill appearing with high fever, and they may also have signs of venous occlusion, including arm and neck edema. The mortality rate of these infections is high, but cases of successful treatment have been reported.[6]

Lemierre syndrome is a suppurative thrombophlebitis of the internal jugular vein caused by oropharyngeal infections such as tonsillitis and dental infections. Spread of the infection into the parapharyngeal space that houses the carotid sheath leads to local inflammation and thrombosis of the jugular vein. Lemierre syndrome is easily missed and is more common than is generally appreciated.[7, 8] Unlike superficial vein thrombophlebitis, septic pulmonary emboli are nearly always present and lead to grave complications such as empyema, lung cavitation, and hypoxemia. Less commonly, septic emboli may traverse a patent foramen ovale and cause distant metastatic infections such as septic arthritis, osteomyelitis, and hepatic abscesses.[9]

Septic pelvic thrombophlebitis and ovarian vein thrombophlebitis are seen principally as a complication of puerperal uterine infections, such as endometritis and septic abortion.[10] Rarely, pelvic phlebitis may result from severe pelvic inflammatory disease or progressive infection of the urinary tract. In abdominal infections, such as appendicitis and diverticulitis, infection may spread to cause neighboring septic phlebitides.

Thrombophlebitis of the intracranial venous sinuses is a particularly serious problem and can involve the cavernous sinus, the lateral sinus, or the superior sagittal sinus. Cavernous sinus thrombophlebitis is caused by infection of the medial third of the face known as the "danger zone," ethmoid and sphenoid sinusitis, and, occasionally, oral infections. Mastoiditis and otitis media are rarely associated with septic phlebitis of the lateral sinuses, while thrombophlebitis of the superior sagittal sinus is the rarest and is primarily associated with meningitis. More than a third of cases of intracranial septic thrombophlebitis are fatal.[11]

Patient education

For patient education information, see Phlebitis.

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Etiology

Causes of peripheral, IVC, and SVC phlebitis include the following:

  • Venipuncture
  • Central and peripheral catheterization
  • Intravenous drug use
  • Abrasions and lacerations
  • Soft-tissue infection
  • Hypercoagulable states
  • Burns

Causes of pelvic, ovarian, and pyelophlebitis include the following:

  • Diverticulitis
  • Endometritis
  • Pelvic inflammatory disease
  • Septic abortion
  • Childbirth
  • Appendicitis
  • Any intra-abdominal infection
  • Cesarean delivery
  • Intra-abdominal surgery
  • Hypercoagulable states

Causes of Lemierre syndrome include the following:

  • Pharyngitis
  • Dental infections
  • Hypercoagulable states

Causes of dural vein thrombophlebitis include the following:

  • Oropharyngeal infection
  • Mastoiditis
  • Otitis media
  • Facial soft-tissue infections
  • Meningitis
  • Hypercoagulable states

Superficial septic thrombophlebitis

Placement of an intravascular catheter is the main causative factor in the development of phlebitis and septic thrombophlebitis. Infection can be introduced during the placement of the catheter or bacteria can colonize first the hub and then the lumen of the catheter before they gain access to the intravascular space.[12] Once inside the venous system, bacteria can proliferate, causing endothelial damage, local inflammation, and thrombosis.

Causative organisms are diverse and include skin and subcutaneous tissue pathogens, enteric bacteria, and flora causing infection in the genitourinary tract. The most common infective organism is Staphylococcus aureus, but coagulase-negative staphylococci, enteric gram-negative bacilli, and enterococci are also frequently implicated.[13]

Impaired local defense, as well as a heavy burden of skin inoculum, increase burn patients’ susceptibility to thrombophlebitis. These infections are often polymicrobial.[4] Steroid use[5] and injection drug use[3] are other important risk factors.

Deep septic thrombophlebitis

Septic pelvic and ovarian vein thrombophlebitides are often puerperal and typically occur within 3 weeks of delivery.[14] They result from a localized uterine infection, such as endometritis. Damage to the intima of pelvic ileofemoral vessels during vaginal or cesarean delivery is thought to contribute to the process of thrombosis. Hypercoagulability secondary to pregnancy, as well as the venous stasis common in the peripartum state, also contribute.[10] Pathogens responsible for endometritis, such as streptococci, Enterobacteriaceae, and anaerobes, are likely causative, but cultures are often negative.

Septic thrombophlebitis of the portal vein, known as pylephlebitis, is a rare complication of diverticulitis (found to be the inciting infection in 32% of cases). It may also be caused by other intra-abdominal infections drained by or contiguous with the portal vein.[15] Local infection of an adjacent structure can cause extravasation of bacteria and toxin-inducing thrombosis and infection. Bacteroides fragilis is the most common pathogen, but other bacteria, such as Escherichia coli, Klebsiella species, and other Bacteroides species, are also found.[15]

Septic IVC/SVC thrombophlebitis has been found almost exclusively in the setting of central venous catheter placement with the subsequent development of thrombosis, infection, and worsening systemic disease. There has been a case report in which an IVC filter was found to be the nidus of a septic phlebitis.[16] In addition to Staphylococcus species, other skin flora and fungal pathogens cause a significant portion of infections. Candida albicans is the most common fungal pathogen, but cases have also been attributed to Candida glabrata.[16]

Lemierre syndrome

Like abdominal and pelvic thrombophlebitis, Lemierre syndrome is characterized by the migration of bacteria through the deep tissues. In this infection, pathogens translocate through the pharynx or are drained from the pharynx into the lateral pharyngeal space, where they come near to the internal jugular vein. Inflammation, thrombosis, and infection may then ensue.[17]

Lemierre syndrome, interestingly, is caused in 80% of patients by Fusobacterium necrophorum,[18] though infections by other pathogens—namely Fusobacterium nucleatum, Bacteroides species, and streptococcal species—have also been reported.[9]

Septic thrombosis of the dural venous sinuses

The predisposing infections that ultimately result in septic thrombosis of the dural venous sinuses are closely related to the venous anatomy of the face and head. Infections of the medial third of the face, involving the nose, periorbital regions, tonsils, and soft palate, have long been recognized risk factors, since these areas drain directly into the cavernous sinus via the facial veins, pterygoid plexus, and ophthalmic veins. Infections of the sphenoid and ethmoid sinuses have been implicated, with bacteria spreading directly through the lateral wall or via emissary veins.[11] Mastoiditis, resulting from chronic ear infections, is almost wholly responsible for cases of septic lateral sinus thrombosis.[11]

While extremely rare, septic thrombophlebitis of the superior sagittal sinus is caused by bacterial meningitis, but frontal, ethmoid, and maxillary sinus infections and spread from infections in the lateral dural sinus have also been reported.[11]

The microbiology of intracranial vascular infections depends in large part on the causative infective site. S aureus is by far the most common organism seen in cavernous sinus thrombosis and is responsible for all septic thromboses resulting from facial and sphenoid sinusitis. Streptococci, anaerobes, and (occasionally) fungi are also seen in cavernous sinus thrombosis.[19, 20]

Organisms responsible for superior sagittal sinus thromboses include those responsible for meningitis, notably S pneumoniae, while pathogens more representative of chronic otitis, such as Proteus, S aureus, E coli, and anaerobes, were found to cause lateral sinus thrombophlebitis.[11]

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Epidemiology

Catheter-associated phlebitis

Catheter-associated bloodstream infection is a common problem well recognized by the hospital community, and major efforts have been made to combat this problem. In 1990, a French study found that 9.9% of patients with peripheral IVs developed signs of phlebitis, while 1.1% became purulent. Similar rates have been noted for central venous catheters.[21] Current research has shown a rate of 0.5 intravenous device ̶ related bloodstream infections per 1000 intravenous device days for peripheral IV catheters and 2.7 for nontunneled, nonmedicated central venous catheters.[22] Burn patients are at an increased risk, with occurrences of septic thrombophlebitis in 4.2% of these individuals.[4]

Noncatheter septic thrombophlebitis

Given the rarity of pelvic, ovarian, jugular, portal, and dural vein septic thrombophlebitides, epidemiologic data describing their frequency are lacking. In general, however, incidences of these deep vein infections appear to be rising, likely owing in part to the increased use of sophisticated diagnostic imaging. In an epidemiologic survey examining the frequency of septic pelvic thrombophlebitis, an overall incidence of 1:3000 deliveries was found, with cesarean deliveries having an approximately 10-fold increase in incidence over vaginal deliveries.[14]

Lemierre syndrome is also infrequent but is easily missed and likely underdiagnosed. Reports from Europe suggested a rate of 0.8 cases per million per year,[23] though subsequent data pointed to an increase in incidence.[24] Septic thrombophlebitis of the dural sinuses is the most rare, with 96 reported cases in the literature over 44 years.[11]

Age-related demographics

Extremes of age predispose patients to catheter-related septic thrombophlebitis. Bloodstream infections were found to be the cause of as much as 30% of nosocomial infections in neonates with intravenous catheters,[25] with undeveloped host defenses thought to be responsible for this. Vulnerability is also increased in elderly persons, likely secondary to concomitant illnesses and a nonspecific, age-related decline in immunologic function.

Garrison et al reported increased risk for the development of major complications from intravenous catheter placement in patients aged 50 years and older, with an odds ratio of 4.7.[26]

Notable exceptions to the above age-related predispositions are Lemierre syndrome and septic pelvic and ovarian thrombophlebitides: Lemierre disease occurs in healthy, young adults with a mean age of onset of 20 years,[7] while septic pelvic and ovarian thrombophlebitides occur in women of childbearing age.

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Prognosis

Septic thrombophlebitis is a relatively rare disease that encompasses an array of clinical entities, so data on mortality rates are scarce. Needless to say, it is a serious and dangerous disease, since the infection takes root in the central or peripheral venous system and can readily progress to sepsis and shock.

Metastatic foci of infection are common, with septic pulmonary emboli, infective endocarditis, septic emboli to the central nervous system, osteomyelitis, septic arthritis, and even arteritis all adding to the morbidity and mortality burden of this disease.[13] In fact, major complications occur in about one third of all patients with catheter-associated peripheral septic phlebitis.[13]

Some entities of deep venous thrombosis carry uniquely high mortality rates, with pylephlebitis portending a mortality rate of 32% in one case series of 19 patients.[15] Thrombophlebitis due to Candida species, as seen with central venous catheters, boasts a 22% death rate.[16]

The death rate remains extremely high for patients with septic thrombophlebitis of the intracranial dural sinuses; septic cavernous sinus thrombosis carries a mortality rate of 30%, while 78% of patients with infection of the superior sagittal sinus die even with appropriate antibiotic treatment. Serious complications in survivors include ocular palsies, hemiparesis, blindness, and pituitary insufficiency.[11]

Notably, however, pelvic and jugular thrombophlebitis appear to have become less deadly over the years. Early twentieth century data reported a 50% mortality rate in the setting of pelvic thrombophlebitis, while one series following more than 44,000 deliveries demonstrated no major complications and not a single death.[14] Lemierre syndrome, though previously reported as uniformly fatal, has become much more manageable with appropriate antibiotic coverage; a death rate of about 6.4% has been reported.[7, 9]

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Contributor Information and Disclosures
Author

Nicholas Connors, MD Resident Physician, Department of Emergency Medicine, New York Presbyterian Hospital, University Hospital of Cornell and Columbia

Disclosure: Nothing to disclose.

Coauthor(s)

Juliet D Caldwell, MD Assistant Professor, Department of Emergency Medicine, Weill Cornell Medical College; Attending Physician, Department of Emergency Medicine, New York Presbyterian Hospital, Weill-Cornell Medical Center; Attending Physician, Department of Emergency Medicine, Long Island College Hospital

Juliet D Caldwell, MD is a member of the following medical societies: Alpha Omega Alpha, American College of Emergency Physicians, Society for Academic Emergency Medicine

Disclosure: Nothing to disclose.

Chief Editor

Jeter (Jay) Pritchard Taylor, III, MD Assistant Professor, Department of Surgery, University of South Carolina School of Medicine; Attending Physician, Clinical Instructor, Compliance Officer, Department of Emergency Medicine, Palmetto Richland Hospital

Jeter (Jay) Pritchard Taylor, III, MD is a member of the following medical societies: American Academy of Emergency Medicine, South Carolina Medical Association, Columbia Medical Society, South Carolina College of Emergency Physicians, American College of Emergency Physicians, American Medical Association, Society for Academic Emergency Medicine

Disclosure: Serve(d) as a director, officer, partner, employee, advisor, consultant or trustee for: Chief Editor for Medscape.

Acknowledgements

Craig F Feied, MD, FACEP, FAAEM, FACPh Professor of Emergency Medicine, Georgetown University School of Medicine; General Manager, Microsoft Enterprise Health Solutions Group

Craig F Feied, MD is a member of the following medical societies: American Academy of Emergency Medicine, American College of Emergency Physicians, American College of Phlebology, American College of Physicians, American Medical Association, American Medical Informatics Association, American Venous Forum, Medical Society of the District of Columbia, Society for Academic Emergency Medicine, and Undersea and Hyperbaric Medical Society

Disclosure: Nothing to disclose.

Jonathan A Handler, MD HSG Chief Deployment Architect, Microsoft Corporation, Adjunct Associate Professor, Department of Emergency Medicine, Northwestern University, Feinberg School of Medine

Jonathan A Handler, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Emergency Medicine, American Medical Informatics Association, Phi Beta Kappa, and Society for Academic Emergency Medicine

Disclosure: Nothing to disclose.

Richard S Krause, MD Senior Clinical Faculty/Clinical Assistant Professor, Department of Emergency Medicine, University of Buffalo State University of New York School of Medicine and Biomedical Sciences

Richard S Krause, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Emergency Medicine, American College of Emergency Physicians, and Society for Academic Emergency Medicine

Disclosure: Nothing to disclose.

Eddy S Lang, MDCM, CCFP(EM), CSPQ Associate Professor, Senior Researcher, Division of Emergency Medicine, Department of Family Medicine, University of Calgary Faculty of Medicine; Assistant Professor, Department of Family Medicine, McGill University Faculty of Medicine, Canada

Eddy S Lang, MDCM, CCFP(EM), CSPQ is a member of the following medical societies: American College of Emergency Physicians, Canadian Association of Emergency Physicians, and Society for Academic Emergency Medicine

Disclosure: Nothing to disclose.

Francisco Talavera, PharmD, PhD Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Medscape Salary Employment

Christian Theodosis, MD, MPH Resident Physician, Section of Emergency Medicine, Yale School of Medicine

Disclosure: Nothing to disclose.

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