title: Osteoid osteoma: elevation of cardiac and respiratory rates at biopsy needle entry into tumor in 10 patients.
abstract: OBJECTIVE
  To evaluate changes in cardiac and respiratory rates in a consecutive series of patients who underwent percutaneous treatment for lesions presumed to be osteoid osteoma in whom general anesthesia was established.
  
  
  METHODS
  Changes in cardiac and respiratory rates were evaluated after establishment of stable general anesthesia in 14 patients who underwent needle biopsy and radio-frequency treatment. Cardiac and respiratory rates were recorded at penetration of skin, muscle, periosteum, cortex, and tumor. Treatment was performed before the biopsy report was available.
  
  
  RESULTS
  Biopsy results revealed osteoid osteoma in 10 patients, chondroblastoma in one, and a herniation pit in one. Results in the two remaining patients were nondiagnostic and were excluded. Puncture of skin, muscle, and periosteum caused no detectable change. However, in the 10 patients with biopsy-proved osteoid osteoma, puncture of the tumor caused the mean cardiac rate to increase an average of 26 beats per minute (40%) to 91 (range, 62-114; P <.001) and the mean respiratory rate to increase an average of 12 breaths per minute (50%) to a mean of 37 (range, 25-52; P <.001). These changes occurred within seconds of tumor puncture and were often the first indication to the surgeon that the tumor had been entered. In the two patients with other diagnoses at biopsy, no such change was apparent.
  
  
  CONCLUSIONS
  Mean cardiac and respiratory rates increase significantly at needle puncture of osteoid osteoma.
authors.affiliation: Department of Radiology, Harvard Medical School, Massachusetts General Hospital, 199 Cambridge St, Boston, MA 02114, USA. dirosenthal@partners.org
authors.forename: Daniel I
authors.initials: DI
authors.lastname: Rosenthal
authors.forename: John J A
authors.initials: JJ
authors.lastname: Marota
authors.forename: Francis J
authors.initials: FJ
authors.lastname: Hornicek
mesh_terms: D000293:Adolescent; D000328:Adult; D000768:Anesthesia, General; D001707:Biopsy, Needle; D001859:Bone Neoplasms / Q000503:physiopathology*; D002648:Child; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D010017:Osteoma, Osteoid / Q000503:physiopathology*; D012143:Respiratory Physiological Phenomena