Purpose: To examine the influence of central corneal thickness (CCT), corneal curvature (CC), and axial length (AL) on intraocular pressure (IOP).Methods: Eighty-one clinically normal eyes were included in our study. ...Purpose: To examine the influence of central corneal thickness (CCT), corneal curvature (CC), and axial length (AL) on intraocular pressure (IOP).Methods: Eighty-one clinically normal eyes were included in our study. The IOP, CCT, CC, AL were measured using a Goldmann applanation tonometer, optical pachymeter, keratometer and A-scan ultrasound biometer respectively in all subjects.Results: A highly significant positive correlation was identified between IOP and CCT. Linear regression analysis suggests that an increase in CCT of 0. 010 mm is associated with a 4. 946 mmHg increment in IOP. No significant positive correlation was identified between IOP and CC. P values are 0. 724 and 0.414 respectively for vertical and horizontal readings. A paradoxically reversed correlation was present between IOP and axial length.Conclusion: Corneal thickness is a very important confounding factor in the measurement of intraocular pressure, which warrants further attention in our clinical practice.展开更多
目的比较两种体外测量经外周静脉置入中心静脉导管(peripherally inserted central venous catheter,PICC)置管长度的方法。方法选择2008年6月～2009年10月本院胃肠外科行PICC置管患者100例,随机分为对照组和实验组,每组各50例。对照组...目的比较两种体外测量经外周静脉置入中心静脉导管(peripherally inserted central venous catheter,PICC)置管长度的方法。方法选择2008年6月～2009年10月本院胃肠外科行PICC置管患者100例,随机分为对照组和实验组,每组各50例。对照组采用从穿刺点至右胸锁关节再向下反折至第3肋间的L型测量法,实验组采用从穿刺点至右胸锁关节一字型测量法,在测量数值的基础上加上3cm为总置管长度。置管成功后予胸片定位,比较两组患者PICC置入上腔静脉的成功率。结果实验组PICC置入上腔静脉的成功率高于对照组(P<0.05)。结论 PICC置管采用一字型的测量方法,可以保证导管置入上腔静脉,提高了置管的安全性,值得临床推广应用。展开更多
文摘Purpose: To examine the influence of central corneal thickness (CCT), corneal curvature (CC), and axial length (AL) on intraocular pressure (IOP).Methods: Eighty-one clinically normal eyes were included in our study. The IOP, CCT, CC, AL were measured using a Goldmann applanation tonometer, optical pachymeter, keratometer and A-scan ultrasound biometer respectively in all subjects.Results: A highly significant positive correlation was identified between IOP and CCT. Linear regression analysis suggests that an increase in CCT of 0. 010 mm is associated with a 4. 946 mmHg increment in IOP. No significant positive correlation was identified between IOP and CC. P values are 0. 724 and 0.414 respectively for vertical and horizontal readings. A paradoxically reversed correlation was present between IOP and axial length.Conclusion: Corneal thickness is a very important confounding factor in the measurement of intraocular pressure, which warrants further attention in our clinical practice.
