Department of Emergency Medicine, Chiangrai Prachanukroh Hospital, Robwiang, Mueang, Thailand.
Department of Emergency Medicine, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Dusit, Thailand.
Clin Toxicol (Phila). 2024 Aug;62(8):497-505. doi: 10.1080/15563650.2024.2377273. Epub 2024 Jul 30.
The objective of this study was to compare limb circumference measurements between a three-dimensional scanner and a measuring tape.
Patients older than 18 years, who were bitten by a green pit viper and visited the emergency department between 1 October and 20 December, 2019 were included. Two physicians measured the circumference of a bitten limb and a contralateral unaffected limb twice using both a measuring tape and a three-dimensional scanner. Each patient was measured at the first emergency department visit and again at 24 h, 48 h, and 72 h post-snakebite. There were three points of measurement on both limbs.
There were 408 anatomical locations from 17 patients for measurement. The three-dimensional scanner and the measuring tape demonstrated a very high correlation (r-squared >0.940, value <0.001) in measuring limb circumferences. Bland Altman plots also demonstrated the two methods measured limb circumferences with similar results with mean differences <1 cm. Intraclass correlation coefficient between the two methods was greater than 0.8 in every site for the lower limbs, but for the upper limbs, most sites had a poor agreement (ranges: 0.073-0.633). For limb volume measurement, the three-dimensional scanner provided excellent and moderate inter and intrarater reliabilities for the lower and upper limbs, respectively.
The three-dimensional scanner could be reliably used to assess limb circumference with a strong correlation and with a relatively small error compared with the conventional method. Pictures from the scan can also be constructed to calculate limb volume that could have potential for other clinical purposes such as in evaluating antivenom response for limb swelling.
Circumferences from the three-dimensional scanner were comparable to those from the measuring tape, especially for the lower limbs, and the three-dimensional scanner demonstrated an added value for calculating limb volume.
本研究的目的是比较三维扫描仪和卷尺测量肢体周长的差异。
本研究纳入了 2019 年 10 月 1 日至 12 月 20 日期间因被竹叶青蛇咬伤而就诊于急诊科的年龄大于 18 岁的患者。两位医生使用卷尺和三维扫描仪两次测量了患者咬伤肢体和对侧未受伤肢体的周长，每个患者在首次就诊时和咬伤后 24、48 和 72 小时进行测量。四肢各有三个测量点。
本研究共有 17 名患者的 408 个解剖部位进行了测量。三维扫描仪和卷尺在测量肢体周长方面具有非常高的相关性（r-squared>0.940，p<0.001）。Bland-Altman 图也表明两种方法测量的肢体周长具有相似的结果，平均差异<1cm。两种方法在下肢的所有部位的组内相关系数均大于 0.8，但在上肢，大多数部位的一致性较差（范围：0.073-0.633）。对于肢体体积测量，三维扫描仪在下肢和上肢的肢体周长测量中均提供了良好和中度的组内和组间可靠性。
与传统方法相比，三维扫描仪可用于评估肢体周长，具有较强的相关性和较小的误差。扫描图像还可用于计算肢体体积，这可能在评估抗蛇毒血清治疗肢体肿胀反应等其他临床用途方面具有潜在价值。
三维扫描仪测量的周长与卷尺相似，尤其是下肢，并且三维扫描仪在计算肢体体积方面具有附加价值。
