Moore T C, Collins D L, Catanzarite V, Hatch E I
Division of Pediatric Surgery Harbor-UCLA Medical Center 1000 West Carson Street, Torrance, California 90509, USA.
Pediatr Surg Int. 1999;15(2):97-104. doi: 10.1007/s003830050525.
The marked advantages and merit of pre-term and particularly pre-labor (PTPL) cesarean section (C-section) in the avoidance, and indeed, virtual elimination of severely disabling gastroschisis (GS) complications in infants diagnosed prior to birth by ultrasound has unfortunately remained controversial in the 10 to 12 years since it was first reported and strongly recommended by numerous authors. During this period, GS has remained one of the four major causes of the short-gut syndrome (SGS) in infancy and childhood and a major cause of prolonged, costly, complicated, and hazardous neonatal intensive care unit stays with requirements for total parenteral nutrition (TPN). The most serious and frequent complications of GS in infants born without PTPL C-section are the occurrence of the "peel", which greatly enlarges and rigidifies the eviscerated gut, and of "complicated GS" (intestinal atresia/s, stenosis, necrosis, perforations) (CGS). The "peel" occurs in 100% of these cases and CGS in approximately 20%. "Peel" enlargement and rigidification of eviscerated intestine in the presence of a reduced peritoneal cavity causes great difficulty in covering the eviscerated, enlarged, and rigidified gut with abdominal wall, skin, a prosthesis, etc., and frequently produces gut ischemia from excessive pressure, which may lead to necrotizing enterocolitis (NEC) and SGS as well as prolonged hospital stays. The presence of a "peel" greatly complicates the hazards of dealing with cases of CGS, as resection and anastomosis are virtually impossible in the presence of a "peel." The authors report personal experience with 77 cases of GS dating as far back as 1951; 44 of the infants were born after the onset of labor by vaginal or C-section delivery and all had some degree of "peel" formation. Of 320 cases from the literature (including some of the cases reported here), 61 (19.1%) involved CGS. Of the 33 cases born PT, and especially PL, there were no cases of "peel" and only 1 case of CGS (3.0%). This infant had a single atresia associated with a very small (1 cm) defect in the abdominal wall and no labor-induced "peel," which was easily and successfully repaired by resection and anastomosis. The 6.4-fold reduction in the occurrence of CGS by PTPL C-section (3.0% vs 19.1%) was statistically significant by the chi-square test (P < 0.05), as was the 100% elimination of the disabling "peel." If the single case of CGS associated with a very small defect and no labor or labor-associated "peel" is eliminated, the incidence of CGS in the remaining PTPL group of 32 cases falls to 0 (0% versus 19.1%, P < 0.007). PT and especially PL C-section may be expected to virtually eliminate "peel" formation and CGS and to remove GS as one of the four major causes of SGS. The findings of this report that PT labor prior to PT C-section may result in both "peel" formation and CGS further solidifies the role of labor in the production of both the "peel" and the equally disabling CGS. Failure to appreciate the central role of labor in GS complications has doubtless contributed to the persistent controversy concerning the value and importance of PTPL C-section for gastroschisis diagnosed in utero. The pediatric surgeon has an important responsibility with the obstetrician to monitor the possible occurrence of occult labor in the waning weeks of pregnancy and be prepared to do a prompt C-section if it occurs and there is adequate lung maturity. The achievement of "peel"- and CGS-free gut would greatly facilitate the use of the new Bianchi technique of gut reduction without anesthesia. The combination of the use of epidural anesthesia for the elective PTPL C-section with the Bianchi approach would spare both mother and baby any untoward effects of general anesthesia and present the potential for massive reductions in hospital costs with minimal patient manipulation and disturbance. For infants born with labor-associated "peel," re-evaluation of the suitability and effectiv
早产尤其是临产前剖宫产(PTPL C-section)在避免并实际上几乎消除通过超声在产前诊断出的婴儿严重致残性腹裂(GS)并发症方面具有显著优势和优点,然而不幸的是,自首次报道并被众多作者强烈推荐后的10至12年里,这一做法仍存在争议。在此期间,GS一直是婴幼儿短肠综合征(SGS)的四大主要病因之一,也是新生儿重症监护病房长期、昂贵、复杂且危险住院的主要原因,这些患儿需要全胃肠外营养(TPN)。对于未进行PTPL C-section出生的GS婴儿,最严重且常见的并发症是出现“包膜”,这会使脱出的肠道大幅增大并变硬,以及出现“复杂型GS”(肠道闭锁、狭窄、坏死、穿孔)(CGS)。在这些病例中,“包膜”的发生率为100%,CGS的发生率约为20%。在腹腔容积减小的情况下,脱出肠道的“包膜”增大和变硬会导致用腹壁、皮肤、假体等覆盖脱出、增大且变硬的肠道变得极为困难,并常常因压力过大导致肠道缺血,这可能引发坏死性小肠结肠炎(NEC)和SGS以及住院时间延长。“包膜”的存在极大地增加了处理CGS病例的风险,因为在有“包膜”的情况下几乎无法进行切除和吻合。作者报告了自1951年以来77例GS的个人经验;其中44例婴儿是在分娩发动后通过阴道或剖宫产出生的,所有这些婴儿都有一定程度的“包膜”形成。在文献报道的320例病例(包括此处报告的部分病例)中,61例(19.1%)涉及CGS。在33例早产尤其是临产前出生的病例中,没有“包膜”形成的病例,仅有1例CGS(3.0%)。该婴儿有一处单一闭锁,伴有腹壁非常小(1厘米)的缺损,且没有分娩诱发的“包膜”,通过切除和吻合很容易且成功地进行了修复。通过PTPL C-section,CGS的发生率降低了6.4倍(3.0%对19.1%),经卡方检验具有统计学意义(P < 0.05),“致残性包膜”的完全消除也是如此。如果排除与非常小的缺损且无分娩或分娩相关“包膜”相关的这例CGS病例,其余32例PTPL组中CGS的发生率降至0(0%对19.1%,P < 0.007)。早产尤其是临产前剖宫产有望几乎消除“包膜”形成和CGS,并将GS从SGS的四大主要病因中去除。本报告的研究结果表明,PT C-section前的早产可能导致“包膜”形成和CGS,这进一步巩固了分娩在“包膜”和同样致残的CGS产生中的作用。未能认识到分娩在GS并发症中的核心作用无疑导致了关于PTPL C-section对产前诊断出的腹裂的价值和重要性的持续争议。小儿外科医生与产科医生有重要责任监测妊娠后期可能出现的隐匿性分娩,并准备好在出现隐匿性分娩且肺成熟度足够时迅速进行剖宫产。实现无“包膜”和CGS的肠道将极大地促进新的 Bianchi 肠道缩减技术在无麻醉情况下的应用。将硬膜外麻醉用于择期PTPL C-section与 Bianchi 方法相结合,可使母婴免受全身麻醉的任何不良影响,并有可能在对患者操作和干扰最小的情况下大幅降低住院成本。对于有分娩相关“包膜”出生的婴儿,重新评估其适用性和有效性