Chia Y T, Arulkumaran S, Chua S, Ratnam S S
Department of Obstetrics and Gynaecology, National University Hospital, Singapore.
Asia Oceania J Obstet Gynaecol. 1990 Jun;16(2):145-51. doi: 10.1111/j.1447-0756.1990.tb00017.x.
The effectiveness of transcutaneous electric nerve stimulation (TENS) for pain relief in labour was compared to inhalation analgesia consisting of 50% nitrous oxide and 50% oxygen (ENTONOX). In the first part of the study 101 patients in early labour were allocated to using TENS (Group A) or ENTONOX (Group B) for pain relief. Our results did not show any beneficial effect on pain relief in labour with the use of TENS over ENTONOX; 18.8% of patients in Group A went through labour without any further form of analgesia as opposed to 17.0% in Group B. In the second part of the study 20 nulliparous patients having induced labour were randomly allocated to use TENS (Group C) or ENTONOX (Group D) as the first modality of pain relief. A switchover was made when labour pains were no longer tolerable. The results showed that both TENS and ENTONOX could be used in early labour up to 5-6 cm cervical dilatation till the frequency of contractions was nearly 5 in 10 min or the first 3-4 hr from the time patients first requested pain relief in labour when frequency of contractions was nearly 4 in 10 min. TENS could be used in early labour for patients who wish to be ambulant and is as effective as ENTONOX. Either modality of pain relief was not adequate for pain relief throughout labour.
将经皮电刺激神经疗法（TENS）用于分娩镇痛的效果与由50%氧化亚氮和50%氧气组成的吸入性镇痛法（恩托诺克斯）进行了比较。在研究的第一部分，101名处于分娩早期的患者被分配使用TENS（A组）或恩托诺克斯（B组）进行镇痛。我们的结果并未显示使用TENS在分娩镇痛方面比恩托诺克斯有任何益处；A组中有18.8%的患者在分娩过程中未使用任何其他形式的镇痛，而B组这一比例为17.0%。在研究的第二部分，20名引产的初产妇被随机分配使用TENS（C组）或恩托诺克斯（D组）作为第一种镇痛方式。当宫缩疼痛无法忍受时进行转换。结果表明，TENS和恩托诺克斯在分娩早期宫颈扩张达5 - 6厘米之前、宫缩频率接近每10分钟5次时，或在患者首次要求分娩镇痛后最初3 - 4小时内宫缩频率接近每10分钟4次时均可使用。TENS可用于希望能走动的分娩早期患者，且与恩托诺克斯效果相同。两种镇痛方式在整个分娩过程中镇痛效果均不充分。
