Amniotic Fluid Embolism. Is a New Pregnancy Possible? Case Report / Embolia do líquido amniótico. Será uma nova gestação possível? Relato de caso

Abstract Amniotic fluid embolism (AFE) is a rare but potentially catastrophic clinical condition, characterized by a combination of signs and symptoms that reflect respiratory distress, cardiovascular collapse and disseminated intravascular coagulation (DIC). Its pathogenesis is still unclear. More recently, the traditional view of obstruction of pulmonary capillary vessels by amniotic fluid emboli as the main explanation for the etiology has been ruled out, and immunologic factors and the activation of the inflammatory cascade took on an important role. Amniotic fluid embolism has an unpredictable character, its diagnosis is exclusively clinical, and the treatment consists mainly of cardiovascular support and administration of blood products to correct the DIC. No diagnostic test is recommended until now, though multiple blood markers are currently being studied. The authors present a case report of a woman who had survived AFE in her previous pregnancy and had a subsequent pregnancy without recurrence, providing one more clinical testimony of the low risks for the pregnancy after AFE.

Resumo A embolia do liquido amniótico (ELA) é uma situação clínica rara, mas potencialmente catastrófica, que se caracteriza por uma combinação de sinais e sintomas clínicos que refletem insuficiência respiratória aguda, colapso cardiovascular e coagulação intravascular disseminada (CID). A sua patogênese ainda não é totalmente compreendida. Mais recentemente, a visão tradicional de obstrução dos capilares pulmonares por êmbolo de líquido amniótico, como explicação principal para a etiologia desta síndrome, tem sido desconsiderada, assumindo os fatores imunológicos e a ativação das cascatas de resposta inflamatória um papel importante. A embolia do líquido amniótico tem um carácter imprevisível, e o seu diagnóstico é exclusivamente clínico, sendo o tratamento sobretudo de suporte respiratório e cardiovascular, com a concomitante administração de derivados do sangue para corrigir a CID. Nenhum teste de diagnóstico é recomendado até o momento, embora vários marcadores do sangue periférico se encontrem em estudo. Os autores apresentam um caso clínico de uma mulher que sobreviveu a um quadro de embolia de líquido amniótico na sua gravidez prévia, e que teve uma gravidez subsequente sem recorrência do quadro, contribuindo com mais um testemunho clínico do baixo risco na gravidez pós-ELA.

Re-insufflation after deflation of a pneumoperitoneum is a risk factor for CO2 embolism during laparoscopic prostatectomy: A case report / 대한마취과학회지

Although symptomatic carbon dioxide (CO2) embolism is rare, it recognized as a potentially fatal complication of laparoscopic surgery. Sudden hemodynamic instability could be a CO2 embolism especially during insufflation. A 65-year-old man received laparoscopic prostatectomy for 5 hours under CO2 pneumoperitoneum without any problem. After resection of prostate, it was stopped following deflation. Thirty minutes later, peumoperitoneum was re-induced to continue the operation. Shortly after re-insufflation, the patient revealed hemodynamic instability suggested a CO2 embolism; severe hypotension, tachyarrythmia, hypoxemia, increased CVP, and changed end-tidal CO2. Gas insufflation was stopped. He was managed with Durant's position, fluid and cardiotonics for 20 minutes. The residual was completed by open laparotomy. Re-insufflation, inducing gas entry through the injured vessels, might be a risk factor for CO2 embolism in this case. The risk to the patient may be minimized by the surgical team's awareness of CO2 embolism and continuous intra-operative monitoring of end-tidal CO2.

Cardiovascular collapse developing during thoracoscopic thoracic sympathectomy in a patient with essential palmar hyperhidrosis: A case report / 대한마취과학회지

Thoracoscopic thoracic sympathectomy (TTS) is usually a safe and uncomplicated procedure for treating essential palmar hyperhidrosis. However, we report a case of cardiovascular collapse that developed in a healthy patient undergoing TTS. The surgeon performed the left sympathectomy without incident. However, scarcely had an incision been made in the skin of the right chest when the patient developed sinus bradycardia and sudden, severe hypotension. Pulseless ventricular tachycardia occurred immediately thereafter, which rapidly progressed to ventricular fibrillation and cardiovascular collapse. The patient required resuscitation with 200 J of direct current shock defibrillation along with an intravenous injection of epinephrine 1 mg. She recovered without sequelae. We believe the Bezold-Jarisch reflex was triggered by pooling of venous blood and surgical stimuli, and the patient developed cardiovascular collapse as a result.

Intravenous Vitamin K-induced Cardiovascular Collapse : A case report / 대한마취과학회지

A cardiovascular collapse, due to preoperatively administered intravenous vitamin K (phytonadione), was experienced in a 59-year-old woman who was scheduled to undergo a left upper lung lobectomy. The patient developed sudden facial flushing, an upper torso rash, dyspnea, palpitation, and severe hypotension about 2 min after the intravenous administration of approximately 2 mg of vitamin K. Immediate hydration and an injection of 20 mg ephedrine restored her blood pressure to the preoperative level within 5 min. The patient recovered without any sequelae, but the operation was postponed. The patient's symptoms seemed to be due to an anaphylactoid reaction or anaphylaxis following the intravenous administration of vitamin K. This case report suggests that physicians should carefully review the indications of vitamin K prior to administration, even at low doses.

Two Cases of Systemic Capillary Leak Syndrome that were Treated with Pentastarch

Systemic capillary leak syndrome (SCLS) is a condition that's caused by the shift of fluid and protein from the intravascular space to the interstitial space as a result of repetitive episodes of capillary hyperpermeability. The pathogenesis of SCLS is still unclear, but there's recently been a report showing this syndrome in association with monoclonal gammopathy. This syndrome can be a fatal disease because cardiovascular collapse can occur in the initial capillary leak phase. Although theophylline, diuretics, terbutaline, steroids, calcium antagonist, Ginkgo biloba extracts and plasmapheresis have been suggested as medication, none of them have been proven to be effective. Considering that this disease is self-limiting, conservative treatment in the acute phase is believed to be very important. Because hypoalbuminemia is very a common manifestation of SCLS, Pentastarch, which has a higher molecular weight than albumin, could be efficient to prevent cardiovascular collapse. We used 10% Pentastarch during the acute SCLS attacks of 2 patients and the patients both showed a dramatic response. Pentastarch may be helpful to treat SCLS in its initial capillary leak phase by the elevating blood pressure, and this might contribute to somewhat decreasing the acute mortality of SCLS.

Anaphylactic Reaction after Thiopental Sodium Injection -A case report- / 대한마취과학회지

A 43-year-old female was admitted for a laparoscopic surgical procedure. Her past history included two uneventful general anesthesias, but anaphylactic shock due to an unknown drug occurred during her third surgery. Induction was performed with thiopental sodium, but an immediate anaphylactic reaction developed with cardiovascular collapse. We resuscitated the patient and she recovered without any complication.

Cardiac Arrest after Gas Insufflation for Laparoscopic Surgery: Two case reports / 대한마취과학회지

Laparoscopic surgery is a frequently used technique in surgery. But artificial pneumoperitoneum with CO2 causes cardiovascular complication. We experienced two cases of cardiac arrests after gas insufflation. In first case, end tidal CO2 concentration increased rapidly and then immediately cardiac arrest occurred. We performed cardiac resuscitation with epinephrine and cardiac compression and result in good recovery. A rapid rise in end tidal concentration is suggested as a useful early sign of CO2 embolism. In second case, cardiac arrest occurred after gas insufflation, too. We used atropine and ephedrine but severe bradycardia and hypotension was not recovered. After removal of CO2, heart rate and blood pressure restored. We found that flow rate of CO2 was 50 L/min. The operation was started again, we used flow rate of CO2 at 1 L/min. The operation was successful uneventfully. Slow insufflation combined with close monitoring is important to prevent cardiovascular collapse during laparoscopic surgery.

Hemodynamic Comparison between Bupivacaine and Levobupivacaine Induced Cardiovascular Collapses in Anesthetized Dogs / 대한구급학회지

BACKGROUND: Levobupivacaine is known to be less cardiotoxic than racemic bupivacaine but some authors have reported there were no differences in cardiotoxic profiles between two agents. We will investigate the full course to cardiovascular collapse induced by bupivacaine stereoisomers in anesthetized dogs and would find out the differences if any, and explain the causative factors. METHODS: Twenty dogs were assigned to two groups, racemic bupivacaine group (BUP) and levobupivacaine group (LBUP), equally (n=10, each). Under general anesthesia each drug was infused continuously (0.5 mg/kg/min) until cardiovascuar collapse (CVC, MAP=40 mmHg) occurred. During the experiment, hemodynamic data, CO, SVR, PVR, ECG parameters and drug concen tration were gathered and analyzed. RESULTS: Two groups were not different in terms of dose for CVC, plasma drug concentration and time for CVC. MAP maintained initial values during the early period and declined during the late period without any between-group difference. Otherwise CO decreased continuously and significantly higher in LBUP than in BUP throughout. Calculated SVR showed the same feature as CO in opposite direction and was higher in BUP. Correlation test revealed high correlation between CONC and SVR or PVR and between CO and cSvO2. CONCLUSIONS: In assessment of cardiovascular collapse induced by stereoisomers of bupivacaine, monitoring with only MAP can lead to misinterpretation and invasive monitoring including CO or cSvO2 measurement might be needed.