Cetacaine is a topical anesthetic that contains the active ingredients benzocaine (14%), butamben (2%), and tetracaine hydrochloride (2%). Cetacaine also contains small amounts of benzalkonium chloride at 0.5% and 0.005% of cetyl dimethyl ethyl ammonium bromide all in a bland water-soluble base. Although Cetacaine has been widely used in the medical and dental fields, it has yet to be officially approved by the FDA. Cetacaine is produced by the company Cetylite Industries, Inc. and they provide Cetacaine in three forms: liquid, gel, and spray. Medical uses
Cetacaine is a benzocaine-based anesthetic that also contains other active ingredients that include butamben and tetracaine hydrochloride. The main use for this drug is to produce anesthesia to mucous membranes to numb and help control the pain in that area. The spray form of Cetacaine is also used to help prevent gagging in the patient. The anesthetic effect of Cetacaine can be expected to take effect in about 30 seconds and last between 30–60 minutes depending on location and application amount. Cetacaine can and has been used for surgeries that include bronchi, ear, esophagus, larynx, mouth, nose, pharynx, rectal, and vaginal procedures. These procedures can include periodontal treatment, pre-probing, pre-scaling/root planning procedures, pre-injection, and laser dentistry. Available forms
The dosage should be applied directly to the site where anesthesia is required. The dosage should be modified according to the patient and there has not been a dosage specified for children.Spray: Cetacaine spray should be applied for only one second and dosage should not exceed an application spray longer than 2 seconds.
A blighted ovum is a pregnancy in which the embryo never develops or develops and is reabsorbed. In a normal pregnancy, an embryo would be visible on an ultrasound by six weeks after the womans last menstrual period. Anembryonic gestation is one of the causes of miscarriage of a pregnancy.A blighted ovum or anembryonic gestation is characterized by a normal-appearing gestational sac, but the absence of an embryo. It likely occurs as a result of early embryonic death with continued development of the trophoblast. When small, the sac cannot be distinguished from the early normal pregnancy, as there may be a yolk sac, though a fetal pole is not seen. For diagnosis, the sac must be of sufficient size that the absence of normal embryonic elements is established. The criteria depends on the type of ultrasound exam performed. A pregnancy is anembryonic if a transvaginal ultrasound reveals a sac with a mean gestational sac diameter (MGD) greater than 25 mm and no yolk sac, or an MGD >25 mm with no embryo. Transabdominal imaging without transvaginal scanning may be sufficient for diagnosing early pregnancy failure when
an embryo whose crown–rump length is 15 mm or more has no visible cardiac activity. See also
Ovum
Products of conception

References
External links

Blighted Ovum on WebMD
Anembryonic pregnancy on Radiopaedia.org
Johnson, MR; Riddle, AF; Sharma, V; Collins, WP; Nicolaides, KH; Grudzinskas, JG (January 1993). "Placental and ovarian hormones in anembryonic pregnancy". Human Reproduction (Oxford, England). 8 (1): 112–5. doi:10.1093/oxfordjournals.humrep.a137857. PMID 8458911.