Rigor: Causes & Reasons

Possible Causes for Rigor

In patients with louse-borne relapsing fever (Borrelia recurrentis infection), antimicrobial treatment is often followed by sudden fever, rigors, and persistent hypotension [ncbi.nlm.nih.gov]

She developed hypertension, fever, and rigors. Shortly afterward, she became hypotensive and required fluid resuscitation. [ncbi.nlm.nih.gov]

On examination, rigors, shallow inspirations, and chills were noted. [ncbi.nlm.nih.gov]

Febrile Transfusion Reaction

The symptoms of an FNHTR may also include chills, rigors, increased respiratory rate, change in blood pressure, anxiety and a headache. [lifeblood.com.au]

[…] e.g. acute hemolytic transfusion reaction.[7] Fever must be at least 38 °C/100.4 °F oral and a change of at least 1 °C/1.8 °F from pre-transfusion value OR chills and/or rigors [en.wikipedia.org]

Chills, rigors, increased respiratory rate, change in blood pressure, anxiety and a headache may accompany this reaction but may also occur in several more serious transfusion [transfusion.com.au]

Hemolytic Transfusion Reaction

Following initiation of blood transfusion, she experienced a sudden onset of rigorous chills, accompanied by elevated temperature, tachycardia, and hypertension. [ncbi.nlm.nih.gov]

A 26-year-old woman with thalassemia presented rigors, fever, nausea, abdominal pain, and hemolytic biochemistry after exposure to 75 mL of plasma-reduced red blood cells [ncbi.nlm.nih.gov]

[…] reaction resume transfusion with a different blood unit recurrent FNHTRs patients can be pre-medicated with oral paracetamol (or a non-steroidal anti-inflammatory drug if rigors [gpnotebook.co.uk]

Transfusion Reaction

We report an acute HTR due to anti-Wr(a) in a 58-year-old man with myelodysplastic syndrome associated with rigors, shortness of breath and a significant rise in serum bilirubin [ncbi.nlm.nih.gov]

It generally occurs within 2-6 hours of the transfusion and the patient will present with fever, rigors, hypotension, tachycardia, hypoxaemia and tachypnea as well as being [ausmed.com]

Acute onset of hypertension or hypotension, rigors and collapse rapidly follows the transfusion. [patient.info]

Streptobacillary Rat Bite Fever

This infection is characterized by the abrupt onset of fever with rigors, myalgias, headache, polyarthritis, and rash. [ncbi.nlm.nih.gov]

Bacterial Arthritis

We conclude, that the absence of fever, rigors, blood leucocytosis and positive blood cultures does not rule out the possibility of bacterial arthritis. [ncbi.nlm.nih.gov]

Constitutional symptoms such as fever, chills, and rigors are poorly sensitive for septic arthritis. [ncbi.nlm.nih.gov]

Sweats (sensitivity, 27%; 95% CI, 20%-34%) and rigors (sensitivity, 19%; 95% CI, 15%-24%) are less common findings in septic arthritis. [doi.org]

Right-Sided Bacterial Endocarditis

Cardiac / renal failure can develop rapidly (50-70%) Haematuria secondary to renal failure present in about 70% of patients Rigors Night sweats Splinter haemorrhages (10-20% [almostadoctor.co.uk]

[…] system is based on causative organism Also classify based on native valve or prosthetic valve endocarditis Clinical features Vague constitutional symptoms such as fever, rigors [pathologyoutlines.com]

The patient presented with fever with chills and rigors 2 weeks after the induced abortion. She remained febrile for 1.5 months and did not respond to therapy. [atmph.org]

Paroxysmal Cold Hemoglobinuria

Fever with rigor is common, alongside abdominal cramping, pallor, nausea, vomiting, diarrhea, cephalalgia, and muscle spasms in the lower extremities. [symptoma.com]

Most banked blood donations are P-antigen positive but can be used safely in most cases, after rigorous specialist testing. [patient.info]

Symptoms of anemia Pallor Fatigue Dyspnea Poor feeding Symptoms of hemolysis Jaundice Dark urine caused by hemoglobinuria Systemic symptoms Fever, rigors Pain or cramps in [forums.prohealth.com]

Liver Abscess

Both patients were admitted to our institution with a 2-week history of right upper quadrant pain, fever, chills, and rigors. [ncbi.nlm.nih.gov]

A 51-year-old lady presented with a 4-day history of abdominal pain, diarrhoea, fever, rigors, and lethargy. Imaging revealed an abscess which was drained. [ncbi.nlm.nih.gov]

Etiology by source References: [5] [6] [1] [2] [7] [8] [9] [10] [11] [12] Risk factors Clinical features Classic triad of pyogenic liver abscess Fever (with/without chills and rigors [amboss.com]

Agranulocytosis

Signs and symptoms[edit] Agranulocytosis may be asymptomatic, or may clinically present with sudden fever, rigors and sore throat. [en.wikipedia.org]

To decipher the genetic architecture of CIA, it is necessary to apply more rigorous standards of phenotyping and study much larger sample sizes. [ncbi.nlm.nih.gov]

Severe chills with violent shivering are called rigors. [en.wikipedia.org]

Gram-Negative Pneumonia

Symptoms and signs include malaise, fever, chills, rigor, cough, dyspnea, and chest pain. [merckmanuals.com]

Signs and symptoms[edit] Pneumonia Fever Rigors Cough Runny nose (either direct bacterial pneumonia or accompanied by primary viral pneumonia) Dyspnea – shortness of breath [en.wikipedia.org]

Symptoms and signs of hospital-acquired pneumonia in nonintubated patients are generally the same as those for community-acquired pneumonia and include malaise, fever, chills, rigor [merckmanuals.com]

Pentachlorophenol Poisoning

Tachycardia, tachypnoea, sweating, altered consciousness, hyperthermia, convulsions and early onset of marked rigor (if death occurs) are the most notable features. [ncbi.nlm.nih.gov]

To become standardized by the AWPA, preservative-treated wood must undergo a series of rigorous tests to ensure its durability. [fs.fed.us]

Right-Sided Endocarditis

Constitutional symptoms Endocarditis should be considered in patients with vague or generalized constitutional symptoms such as fever, rigors, night sweats, anorexia, weight [ncbi.nlm.nih.gov]

A 33-year-old male, intravenous drug abuser presented with history of fever, rigors, night sweats, cough, pleuritic chest pain, hemoptysis, and worsening dyspnea of two months [heartviews.org]

Malaria

Malaria Journal offers a fast publication schedule while maintaining rigorous peer-review; this is achieved by managing the whole of the publication process electronically [malariajournal.com]

It is manifested by fever along with chills and rigors. Unless it is diagnosed and treated promptly, it can be fatal. [news-medical.net]

The nationwide study was not a rigorous experiment. [nbcnews.com]

Relapsing Fever

Clinical presentation of TBRF is sudden onset of high fever lasting up to a week and ending with rigors, hypertension, and tachycardia. [symptoma.com]

/1/2016) : No change 2018 (effective 10/1/2017) : No change 2019 (effective 10/1/2018) : No change Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor [icd10data.com]

CM Diagnosis Code R50.9 Fever, unspecified 2016 2017 2018 2019 Billable/Specific Code Applicable To Fever NOS Fever of unknown origin [FUO] Fever with chills Fever with rigors [icd10data.com]

Drug-induced Neutropenia

The idiosyncratic nature of IDIN, the lack of mouse models and diagnostic testing, and its low overall incidence make rigorous studies to elucidate possible mechanisms exceptionally [ncbi.nlm.nih.gov]

[…] improved when he was reviewed in the out-patient clinic 6 weeks later but he presented to his doctor another month later with a 2 day history of swinging fever, chills and rigor [medicine-on-line.com]

Ascending Cholangitis

Presentation – rigors, fever, abdominal pain, jaundice Treatment It is a medical emergency. [almostadoctor.co.uk]

Signs and symptoms A person with cholangitis may complain of abdominal pain (particularly in the right upper quadrant of the abdomen ), fever, rigors (uncontrollable shaking [ipfs.io]

Ascending Cholangitis Signs and Symptoms AC patients may experience problems like: Abdominal pain Rigors Fever Malaise, or a feeling of uneasiness Jaundice may also be reported [medicalsubstance.com]

Subcutaneous Abscess

If there is bacteremia patient may present with systemic signs of sepsis such as fever, rigors, and raised inflammatory markers. [radiopaedia.org]

Additionally, systemic features such as fevers and rigors may also be present. [radiopaedia.org]

Bacteremia is common in patients with extensive or severe disease, especially when fever and rigors are present. [infectiousdiseaseadvisor.com]

Malignant Hyperthermia

[…] increased rectal temperature, respiratory rate, and inspiratory effort, with significant blood biochemical changes indicating metabolic acidosis, ending in death and hyperacute rigor [ncbi.nlm.nih.gov]

rigidity (15 points) Generalized rigidity, severe masseter muscle rigidity Muscle breakdown (15 points) Serum creatine kinase concentration >20,000/L units, cola-colored [hindawi.com]

Simultaneously, the muscle rigidity, tachycardia, and tachypnea all resolved. The patient was continuously monitored and the remaining ICU course was uneventful. [hindawi.com]

Acute Endometritis

[…] symptoms include dysuria, frequency and urgency; these occur when the mucosa of the adjacent urinary tract becomes involved. [1] Fever This may be associated with chills and rigors [explainmedicine.com]

Signs and symptoms include lower abdominal pain (suprapubic), rigors, fever, and the discharge of pus on introduction of a sound into the uterus. [en.wikipedia.org]

Plasmodium Falciparum Malaria

CM Diagnosis Code R50.9 Fever, unspecified 2016 2017 2018 2019 Billable/Specific Code Applicable To Fever NOS Fever of unknown origin [FUO] Fever with chills Fever with rigors [icd10data.com]

Having achieved Millennium Development Goal 6—to halt and begin to reverse the incidence of malaria—advances in treatment and prevention, along with rigorous planning and [healthenvoy.org]

[…] toxic factors such as glucose phosphate isomerase (GPI) stimulate macrophages and other cells to produce cytokines and other soluble factors which act to produce fever and rigors [cdc.gov]

Intraperitoneal Abscess in the Right Lower Quadrant

Intermittent bacteremia can result in recurrent fevers and rigors. Liver seeding can occur through the hepatic portal veins. [sharinginhealth.ca]

If it is consistently less, it is likely that some unnecessary operations are being performed, and a more rigorous preoperative differential diagnosis is in order. [intranet.tdmu.edu.ua]

In addition to cutaneous lesions, patients can experience fevers, sweats, rigors, right upper quadrant pain, or pain from bony lytic lesions. [hivinsite.ucsf.edu]

Septic Abortion

Septicemia was defined by a positive blood culture rigors. Hypotension was assumed to be due to hemorrhage unless endotoxic shock was positively identified. [ncbi.nlm.nih.gov]

Clinical features: – pyrexia : associated with the chills and rigors suggest blood stream spread of infection. [infofru.com]

• Fever for 1day with no chills and rigor, max temp not recorded. • No h/o burning micturition, and increased frequency • No h/o SOB, palpitation, headache, dizziness and [slideshare.net]

Blackwater Fever

Clinical presentation: Within a few days of onset there are chills, with rigor, high fever, jaundice, vomiting, rapidly progressive anemia and the passage of dark red or black [histopathology-india.net]

Within a few days of onset there are chills, with rigor, high fever, jaundice, vomiting, rapidly progressive anemia, and dark red or black urine. [en.wikipedia.org]

/1/2016) : No change 2018 (effective 10/1/2017) : No change 2019 (effective 10/1/2018) : No change Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor [icd10data.com]

Acute Bacterial Endocarditis

Mr …, 28-year-old, student, normotensive, nondiabetic, nonsmoker, presented with fever for 1 month, which is low grade, continued, sometimes associated with chills and rigor [prepareformedicalexams.blogspot.com]

Cardiac / renal failure can develop rapidly (50-70%) Haematuria secondary to renal failure present in about 70% of patients Rigors Night sweats Splinter haemorrhages (10-20% [almostadoctor.co.uk]

Plasmodium Vivax Malaria

[…] malarious areas, health-care providers also should consider malaria as a possible cause of fever among patients who have not traveled but are experiencing alternating fevers, rigors [ncbi.nlm.nih.gov]

The proposers have demonstrated that clinical paroxysms in P.vivax malaria i.e., periodic episodes of fever with chills and rigors, are accompanied by a transient but massive [cordis.europa.eu]

62-year-old female presented in the emergency department with complaints of fever for the last 4 days which was intermittent in nature and was associated with chills and rigor [ijccm.org]

Polymer Fume Fever

[…] study looking at the preceding 5.5 years: 99% cases in adults 96% cases in men rapid onset of symptoms (5-10 hours) following exposure to the fumes flu-like symptoms fever, rigors [radiopaedia.org]

He had a lower backache followed, after 30 to 45 minutes, by intense rigors, nocturnal fever, chills, malaise, and a more intense backache. [cdc.gov]

Ehrlichiosis

Despite rigorous resuscitative care and antibiotic treatment, the patient lapsed into multi-organ failure and died. [ncbi.nlm.nih.gov]

CM Diagnosis Code R50.9 Fever, unspecified 2016 2017 2018 2019 Billable/Specific Code Applicable To Fever NOS Fever of unknown origin [FUO] Fever with chills Fever with rigors [icd10data.com]

Intermittent muscular rigors may occur in the late stages of the disease. [symptoma.com]

Puerperal Infection

Salpingo-ophritis Manifestations: Fever, rigors and vomiting. Lower abdominal pain, tenderness and rigidity. [gfmer.ch]

Rigors from pyelonephritis. 95% caused by Escherichia coli, Proteus spp. and Klebsiella spp. Genital tract infection : Tender bulky uterus. [patient.info]

Clinical picture 4 days after delivery there is fever, tachycardia, rigors and malaise. 1-2 days after delivery with more severe manifestations. [gfmer.ch]

Disseminated Tuberculosis

The authors conclude that patients undergoing biological therapy require thorough evaluation prior to initiating treatment, followed by continuous and rigorous monitoring [ncbi.nlm.nih.gov]

URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. [umms.org]

[…] shortness of breath Skin rashes Less common symptoms that may be related to disseminated tuberculosis include: Bone pain Diarrhea Abdominal pain Swelling Blood in the urine Rigors [ada.com]