EBQ:Jolt Test

Complete Journal Club Article

Multiple authors. "Jolt Accentuation of Headache Test for Meningitis". Evidence Review. . :.
PubMed

Definition

• Horizontal rotation of the head at frequency of 2 rotations/second - exacerbation of pre-existing headache is positive test.
• Although a 1991 study showed high sensitivity with this test, multiple newer studies have cast doubt on its sensitivity. Although it may be clinically useful in the right subset of patients, it should not be considered to be 100% Sn

Clinical Question

Can jolt accentuation of headache (worsening of headache with horizontal head rotation) reliably identify patients with meningitis or CSF pleocytosis?

Conclusion

• The jolt accentuation test has variable sensitivity and specificity for meningitis depending on the study
• Original study showed high sensitivity (97%), but subsequent studies have shown lower sensitivity
• The test should not be used in isolation to rule out meningitis

Major Points

• The jolt test involves having the patient turn their head horizontally at a rate of 2-3 rotations per second
• Positive test: worsening of baseline headache with jolt maneuver
• Initial study by Uchihara and Tsukagoshi (1991) reported 97% sensitivity for CSF pleocytosis
• Subsequent validation studies have shown lower sensitivity (55-63%), limiting its use as a standalone screening tool
• Best used as one component of clinical assessment rather than a definitive rule-out test

Study Design

• Multiple studies examined: original derivation study and subsequent validation studies
• Prospective observational studies comparing jolt test results to lumbar puncture findings

Population

• Adult patients presenting with headache and suspected meningitis
• Patients undergoing lumbar puncture for clinical suspicion of CNS infection

Interventions

• No therapeutic intervention; diagnostic accuracy study
• Jolt accentuation maneuver performed at bedside prior to lumbar puncture
• CSF pleocytosis (WBC >5 cells/uL) used as reference standard

Outcomes

• Original Uchihara study: sensitivity 97%, specificity 60%
• Validation studies: sensitivity ranges from 55-97% depending on population and meningitis prevalence
• Negative likelihood ratios in validation studies are not sufficiently low to safely rule out meningitis

Criticisms

• Original study was small (n=54) and conducted in a Japanese population with high meningitis prevalence
• Subsequent larger studies have not replicated the high sensitivity
• The test is painful to perform in patients with severe headache and may be refused
• Cannot distinguish bacterial from viral meningitis
• Low specificity leads to many false positives, potentially increasing unnecessary lumbar punctures

Funding

• Variable across studies

See Also

• Meningitis