title: [Bedside prediction of right subclavian venous catheter insertion length].
abstract: OBJECTIVE
  The present study aimed to evaluate whether right subclavian vein (SCV) catheter insertion depth can be predicted reliably by the distances from the SCV insertion site to the ipsilateral clavicular notch directly (denoted as I-IC), via the top of the SCV arch, or via the clavicle (denoted as I-T-IC and I-C-IC, respectively).
  
  
  METHODS
  In total, 70 SCV catheterizations were studied. The I-IC, I-T-IC, and I-C-IC distances in each case were measured after ultrasound-guided SCV catheter insertion. The actual length of the catheter between the insertion site and the ipsilateral clavicular notch, denoted as L, was calculated by using chest X-ray.
  
  
  RESULTS
  L differed from the I-T-IC, I-C-IC, and I-IC distances by 0.14±0.53, 2.19±1.17, and -0.45±0.68cm, respectively. The mean I-T-IC distance was the most similar to the mean L (intraclass correlation coefficient=0.89). The mean I-IC was significantly shorter than L, while the mean I-C-IC was significantly longer. Linear regression analysis provided the following formula: Predicted SCV catheter insertion length (cm)=-0.037+0.036×Height (cm)+0.903×I-T-IC (cm) (adjusted r(2)=0.64).
  
  
  CONCLUSIONS
  The I-T-IC distance may be a reliable bedside predictor of the optimal insertion length for a right SCV cannulation.
authors.affiliation: Departamento de Anestesiologia e Medicina da Dor, Seoul Paik Hospital, College of Medicine, Inje University, Seul, República da Coreia.
authors.forename: Yoon Ji
authors.initials: YJ
authors.lastname: Choi
authors.affiliation: Departamento de Anestesiologia e Medicina da Dor, Asan Medical Center, University of Ulsan College of Medicine, Seul, República da Coreia. Electronic address: thisisyjro@naver.com.
authors.forename: Kyung-Don
authors.initials: KD
authors.lastname: Hahm
authors.affiliation: Departamento de Anestesiologia e Medicina da Dor, Asan Medical Center, University of Ulsan College of Medicine, Seul, República da Coreia.
authors.forename: Koo
authors.initials: K
authors.lastname: Kwon
authors.affiliation: Departamento de Anestesiologia e Medicina da Dor, Asan Medical Center, University of Ulsan College of Medicine, Seul, República da Coreia.
authors.forename: Eun-Ho
authors.initials: EH
authors.lastname: Lee
authors.affiliation: Departamento de Anestesiologia e Medicina da Dor, Asan Medical Center, University of Ulsan College of Medicine, Seul, República da Coreia.
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Ro
authors.affiliation: Departamento de Anestesiologia e Medicina da Dor, Asan Medical Center, University of Ulsan College of Medicine, Seul, República da Coreia.
authors.forename: Hong Seuk
authors.initials: HS
authors.lastname: Yang
keywords: Cateter venoso central; Central venous catheter; Clavicular notch; Entalhe clavicular; Subclavian vein; Veia subclávia