Saudi Journal of Anaesthesia

: 2017  |  Volume : 11  |  Issue : 4  |  Page : 516--517

Anesthetic management of craniopagus conjoined twins in a remote location

Monu Yadav, Ramakrishnaprasad Chikkala, Dilip Kulkarni, R Gopinath 
 Department of Anaesthesiology and Critical Care, Nizam's Institute of Medical Sciences, Hyderabad, Telangana, India

Correspondence Address:
Monu Yadav
Department of Anaesthesiology and Critical Care, Nizam's Institute of Medical Sciences, Hyderabad - 500 082, Telangana

How to cite this article:
Yadav M, Chikkala R, Kulkarni D, Gopinath R. Anesthetic management of craniopagus conjoined twins in a remote location.Saudi J Anaesth 2017;11:516-517

How to cite this URL:
Yadav M, Chikkala R, Kulkarni D, Gopinath R. Anesthetic management of craniopagus conjoined twins in a remote location. Saudi J Anaesth [serial online] 2017 [cited 2022 May 29 ];11:516-517
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Conjoined twins are one of the most fascinating human malformations. They result from an aberrant twinning process with incomplete fission of the zygote's primitive streak at 20 days of ovulation. Their incidences are very rare (1:200,000) in live births.[1] They are classified on the basis of the site of union as thorax - 40% (thoracopagus), upper abdomen - (xiphopagus) or lower abdomen - (omphalopagus) 33%, sacrum - 19% (pyopagus), pelvis - 6% (ischiopagus), or skull - 2% (craniopagus).[2],[3],[4],[5] We report the anesthetic management for cerebral angiogram of craniopagus twins.

The 12-year-old female, craniopagus twins were admitted for cerebral angiogram. We named twins as V1 and V2 for ease of documentation. Preoperative assessment was done. V1 was 45 kg in weight whereas V2 was only 40 kg. They had no significant medical history. On investigation, no biochemical and hematological abnormalities were detected. A complete cardiac workup with electrocardiogram (ECG) and echocardiogram tests also revealed normal result.

The interventional radiology suite in our institute has a single Boyle's basic anesthesia machine with three parameter Datex-Ohmeda monitor. A day prior to the scheduled procedure, another workstation with multichannel monitoring shifted to the location. After connecting to the gas pipelines, satisfactory working status was confirmed and documented. All anesthesia equipment (airway, drug trays, resuscitation, and suction apparatus) were also duplicated. Two anesthesia teams were formed and a mock drill was rehearsed a day prior, to ensure the feasibility and safety of anesthesia.

Twins were placed in supine position with legs facing in the opposite direction [Figure 1]. Separate intravenous (IV) access secured for both with 20-gauge IV cannula and monitoring included heart rate, ECG, noninvasive blood pressure, pulse oximetry, temperature, and end-tidal carbon dioxide. Cerebral angiogram was planned to be conducted for both one after the other through transfemoral arterial access. Transfemoral arterial access was tried to be secured under local anesthesia in V1. However, as the child did not cooperate, the procedure was done under general anesthesia. Before induction, cross-circulation was ruled out by giving anticholinergic to V1 with no significant changes in heart rate of V2. Sequential induction of anesthesia was planned. V1 induced with injection thiopentone sodium 180 mg and fentanyl 40 mcg. Turning heads of both patients led to a reasonably good position to enable bag mass ventilation. Airway was secured with laryngeal mask airway (LMA) size 3 and anesthesia was maintained with inhalational agents. On induction, slight fall in blood pressure was noted in V1 with no hemodynamic changes in V2. Cerebral angiogram was completed in 45 min. During the procedure, vitals were stable in both, V2 was kept sedated with 1 mg midazolam with O2 supplementation by mask and spontaneous ventilation. After completion of the procedure, LMA was removed under deeper planes of anesthesia to prevent coughing due to stimulation of the airway.[6] Consciousness was regained fully with stable vitals. Then, V2 was induced with thiopentone 160 mg and fentanyl 20 μg and LMA size 3 was put. Slight drop in blood pressure to 75/45 mmHg was observed in V2 which was managed with 6 mg mephentermine IV. No change in blood pressure was observed in V1 during induction of V2. The procedure for V2 completed in 1 h; during this period, V1 was maintained on O2 supplementation by mask with spontaneous ventilation. Both the twins recovered well and were stable hemodynamically. They were kept under observation for 24 h. Cerebral angiogram [Figure 2] revealed no sharing of intracranial arterial circulation. However, V1 was dependent on V2 for cortical venous drainage communicating through the superior sagittal sinus.{Figure 1}{Figure 2}

Anesthetic management for craniopagus twins is associated with unique concerns of cross-circulation, difficulty in mask ventilation, access to airway, and intubation due to angle between the heads. Cerebral angiography provides invaluable information on cerebral vascular architecture.[7]

The lack of hemodynamic and level of consciousness changes in the other twin during premedication, induction, and management of hypotension episodes of first one suggest that there is no or little cross-circulation which was supported by the report of cerebral angiogram also. Cross-circulation is more common in thoracopagus and craniopagus twins and may cause altered and unpredictable drug responses.[8] General anesthesia has less adverse events as compared to sedation which has more risk of hypoxia in high-risk children scheduled for magnetic resonance imaging, computed tomography scan, and angiogram. General anesthesia may also be preferable due to long duration of these studies.

We emphasize upon necessity of systematic and advance planning of anesthetic technique along with good coordination between the two anesthetic teams to face the unique challenges in anesthetic management for craniopagus twins.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.


We acknowledge contribution of Dr. Chaitanya Pratyusha (Junior Resident, final year) for being part of the anesthesia team while conducting the case.

Financial support and sponsorship


Conflicts of interest

There are no conflicts of interest.


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