Why Remove a Stinger by Scraping and Not Pulling From Baby

Abstruse

Dearest bee envenomations are a common occurrence and cause localized morbidity only rarely cause systemic symptoms or decease in humans. Love bee stingers have a uniquely designed venom sac with a piston-containing bifurcated stinger that tin can remain in human peel and keep injecting venom later on stinging. For some time, it has been proposed that a retained love bee stinger should be scraped out by a deadening edge, as opposed to pinching and pulling out the stinger, in order to minimize the volume of venom injected. We undertook a literature review to evaluate the evidence regarding the effectiveness and safety of methods of honey bee stinger removal. The initial search identified 23 articles of involvement; post-obit championship and abstract screening, two studies met the inclusion criteria. The included manufactures used different methods and models to evaluate the relationship betwixt venom injection over time, and one of these studies also compared different methods of stinger removal. The literature review was limited by the small-scale number of studies on the topic, but both included studies include findings relevant to the clinical question of involvement. Based on the available prove, a retained honey bee stinger should be removed as quickly as possible, and there appears to be no disadvantage in doing it by pinching and pulling.

Keywords: honey bee, stinger, envenomation, first aid, wilderness medicine, emergency medicine, hymenoptera

Introduction and background

There are 7 species of beloved bees (society Hymenoptera, genus Apis) that exist worldwide; they are essential for the pollination of plants, including many nutrient crops, and may likewise be used for harvesting dear [1]. They are constitute in large colonies and will sting to defend themselves or their nests; such stings are a common cause of morbidity in many regions of the world [ane]. Beloved bee venom contains several active compounds that lead to pain and cellular injury, including the proteins melittin (a hemolytic factor, and approximately fifty% of the venom dry weight) and apamin [ane]. The enzyme phospholipase A₂ is believed to exist the well-nigh allergenic and immunogenic poly peptide in love bee venom, and it may trigger anaphylaxis in hypersensitive individuals [1].

Dear bee envenomation can result in mortality in rare cases due to both allergic anaphylaxis and massive systemic envenomation [1]. It is unknown how many beloved bee stings occur each twelvemonth; however, the bulk of victims only experience local symptoms, which include a raised erythematous surface area (wheal) that lasts for about 20 minutes accompanied by pain, itching, and swelling [one]. More severe and longer-lasting reactions often occur among those who have previously been stung by a honey bee [1].

It merely takes one sting in a sensitized individual to produce anaphylaxis, which may result in expiry [ii]. Anaphylaxis from Hymenoptera stings occurs in approximately 0.4-iii.0% of the United states of america population and is the leading crusade of death from animal venom with twoscore-50 deaths reported per year [iii]. In patients with anaphylactic reactions, respiratory tract obstruction is the leading cause of death, followed by cardiovascular plummet [4]. Almost deaths from honey bee stings occur among hypersensitive individuals who are only stung once, about ofttimes in the head or neck, and are normally aged more than than twoscore years [1]. Death can also occur from large volume envenomation; it is estimated that 500-1,500 honey bee stings are needed to produce a fatal systemic envenomation, and it is more than likely to occur with more ambitious Africanized honey bees, which are a hybrid and invasive species in the Americas [iv].

Dissimilar some other Hymenoptera species, a honey bee tin only sting a victim once due to its single barbed stinger that is designed to detach from the bee; the stinger remains in the target tissue with the spinous end inhibiting removal in one case the sting occurs [1]. In a dearest bee, the venom appliance consists of a proximal venom sac and a distal bifurcated stinger with a piston-like mechanism that, fifty-fifty after detachment from the bee, functions independently to continue to pump venom into the wound and further imbed the stinger into the victim [5]. Analysis of the bee stinger has shown that a muscular movement, via a piston-like injection machinery, results in venom flowing into the wound, and as such, it would seem that the method of removal may not be as important every bit the rapidity of removal [1,5].

Traditional get-go-assist recommendations are based on the assumption that venom tin be squeezed from this venom sac during removal, which would actually increase the book of venom injection and therefore worsen the envenomation. Hence, it has been recommended that the sac should not be pinched or squeezed during the removal of the venom-stinger apparatus from the skin. Prior recommendations, including those of the American Red Cantankerous, advise removing the retained venom apparatus by scraping it out [6]. This is washed every bit shut to the base of the embedded stinger at the skin surface equally possible, using the edge of a dull object (such every bit a credit card) to avoid squeezing the venom sac [6].

The objective of this systematic literature review was to determine, following honey bee envenomation in man adults and children, what is the most appropriate and effective method for removal of a retained love bee stinging apparatus in the skin with regards to outcomes of localized reaction, hurting, anaphylaxis, and need for further care.

Review

Review methods

A systematic review was conducted according to the Cochrane Handbook for Systematic Reviews of Interventions (http://handbook-v-i.cochrane.org), and results are reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines [7]. Equally this is a review and non a research study, no institutional review lath approval was sought for this work.

Search strategy, data sources, and eligibility criteria

With the help of a medical librarian, a search strategy was adult including the terms "sting removal" or "stinger removal," "bee" (or "bees" or "honey bee" or "Hymenoptera"), and "sting" or "stinger." The following databases were included in the search with no date restrictions: PubMed, OVID - EBM Reviews, Cochrane DSR, ACP Journal Club, Dare, and Google Scholar. A farther transmission search was conducted based on the bibliographies of the articles discovered in the initial search. The search was limited to English language-just sources. Due to the anticipated low number of studies, both human and animate being research was considered for inclusion. The search was initially performed on June 28, 2017, with a repeat search conducted on April 5, 2020, to place any new articles published after the original search. Of notation, this review excluded any research into or works regarding ocular honey bee stings since it is a rare occurrence with a unique gear up of potential complications and management concerns.

Risk of bias and certainty of available show

The risk of bias was assessed using the Cochrane risk of bias tools, including the SYstematic Review Centre for Laboratory beast Experimentation (SYRCLE) and the Risk Of Bias In Non-randomized Studies of Interventions (ROBINS-I). The certainty of bear witness beyond outcomes was assessed through the Grading of Recommendations, Assessment, Development and Evaluation (Grade) methodology [8]. The details regarding these bias and certainty scoring tools can be establish in the Appendix.

Written report selection

Two reviewers (NC and ES) independently reviewed titles and abstracts to determine eligibility for inclusion and, after a consensus was reached, the included studies were reviewed for quality of evidence and interventions and outcomes. A total of 23 studies were identified by the initial search strategy after all duplicates were removed. No additional studies were identified by the manual search. After the title and abstract screening, two studies were evaluated for total-text review, and both were included for analysis. A menstruum diagram that charts the review process is shown in Figure ​ one.

Literature review flow diagram

Study characteristics

Given the small number of studies identified for inclusion, no information were extracted for pooled-analysis or meta-analysis.

Review of results

The two studies identified for inclusion utilized different methodologies and models to evaluate the depth, volume, and duration of love bee stinger envenomation [9,ten]. The pattern, outcomes, primal findings, biases, and dubiousness of these studies are summarized in Table ​ 1.

Tabular array 1

Characteristics, methods, and findings of included studies

Article	Study design	Outcome measured	Key findings	Bias	Certainty of evidence
Schumacher et al. [9]	Observational trial using rabbit and newspaper models	Evaluated depth of stinger insertion and volume of envenomation (as seen by protein assay and pre-post weight measurements)	In a rabbit model, the depth of stinger accelerate was correlated to longer time in the skin; the protein assayed for remainder venom in the stinger apparatus was institute to be inversely related to fourth dimension in a newspaper model. It was seen that there was a statistically significant association between venom delivery (measured by weight) and fourth dimension in both rabbit and paper models; venom commitment appeared to be maximally complete inside 30 seconds	Loftier/serious - SYRCLE assessment	Very depression
Visscher et al. [10]	Quasi-experimental report in humans	Contrasting removal methods (scrape vs. pluck) also every bit varying fourth dimension of envenomation and subsequent measured wheal size	Found a statistically meaning increase in wheal area with increasing fourth dimension to stinger removal wheal area was approximately a log-linear part of dose. No statistically pregnant deviation in wheal size per method of removal, though wheals were on average smaller when pulled as opposed to scraped (74 vs 80 mm2). Some stingers bankrupt off in the skin with the scraping method versus no breakage using the pulling method	Serious - ROBINS-I	Very depression

In the Schumacher study, a rabbit model was utilized to measure the depth of stinger accelerate over time [ix]. These authors also measured the residual venom in the stinger apparatus at different time points after rabbit envenomation in order to all-time approximate the total volume of envenomation [nine]. In a similar paper-model study design, the weight of venom ejected from the stinger was weighed at dissimilar time points [9]. Interestingly, both models in these observational trials constitute that the venom delivery appeared to exist completed by 30 seconds [ix]. In this written report, the authors did not straight evaluate hurting, anaphylaxis, or the need for further treatment subsequently dear bee envenomation.

Visscher et al. used human subjects in a randomized controlled series of experiments and found that the size of localized reaction (wheal) increased with time of envenomation [10]. This written report establish no statistically significant difference between the methods of stinger removal (grasping-pulling compared with scraping) for the outcome of wheal size, though the size of the local reaction was, on average, smaller (74 mm²) when the stinger was pulled when compared with scraping for removal (eighty mm²) [ten]. Although not initially a role of their research question, information technology is interesting to note that Visscher et al. establish that, in their experiments, several stingers bankrupt off and were retained in the skin when using the scraping method of removal as opposed to the grasping-pulling method [ten]. In this written report, while the authors evaluated the means of stinger removal and the relationship with a localized reaction, they did non directly address or study outcomes of participant pain, anaphylaxis, or the need for further care.

Findings from both studies suggest that stinger removal should occur within the beginning few seconds as Visscher demonstrated a significant increase in wheal size over the kickoff viii seconds, and Schumacher noted that envenomation appears to be wearied past 30 seconds [9,ten].

Risk of bias within studies and beyond studies

Overall, the certainty of the evidence was very low. This was primarily due to the studies being observational in nature and downgraded for risk of bias, imprecision, and indirectness. Both of the included studies used structured methodologies to attempt to limit the bias in their work. In the observational work by Schumacher et al., the use of standardized rabbit and paper models limited selection bias but neither of these is equivalent to humans [9]. The authors also appoint in selective reporting with incomplete result data. The use of a melittin assay equally a surrogate for envenomation does heighten the risk of detection bias in this section of their study. Generally, this study did non clearly elucidate many of the variables that can lead to bias, and equally such, the study has a loftier risk of bias overall.

In the piece of work by Visscher et al., a quasi-experimental methodology was employed to limit bias [10]. The employ of the surrogate of wheal size for the book of envenomation does also introduce some bias in the authors' ability to detect the outcomes of concern. There does non appear to exist any clear performance bias, nor attrition or reporting biases; nevertheless, the risk of confounders is rather loftier in this study and there are serious adventure-of-bias concerns.

Neither study included for review was funded by industry and neither appears to have any other systematic biases. To the all-time of our cognition, there is no clear systematic publication bias or selective reporting occurring amongst researchers looking at honey bee envenomation in humans.

Summary measures and synthesis of results

Unfortunately, because of the limitations caused past the heterogeneity and paucity of bachelor literature directly answering our research questions, we were unable to calculate any summary measures or extrapolate any meta-analysis of the available literature.

Summary of evidence

While the breadth of information is limited, the biomechanical pattern of the barbed piston mechanism of the honey bee stinger and the best available evidence suggest that removal of a honey bee stinger as quickly as possible may be of greater importance than the actual technique of stinger removal. The available research indicates that the rapidity of stinger apparatus removal, rather than the method, is what dictates the amount of venom deposited [9,10]. Rapid stinger removal has the potential to limit the size of the local reaction, theoretically limiting hurting and other potential first-aid treatments that may exist needed.

The Visscher study suggests that the method of removal (grasping and pulling versus scraping it out) is not important when removing the stinger. Yet, at that place was some suggestion in this same study that grasping and pulling the stinger apparatus rather than trying to scrape it out results in a lower charge per unit of stinger breakage, thereby resulting in a lower rate of the retained strange body [10].

Although Schumacher et al. did non await at the specific methods of stinger removal, it would seem that any removal technique that minimizes time with the stinger in the skin will decrease the localized reaction, pain, the run a risk of anaphylaxis, and demand for further handling or care [9]. In many existent-world instances, pulling the stinger out will likely be quicker than finding a suitable thin dull object for scrapping a beloved bee stinger off. For these reasons, it seems that the preferable method of stinger removal is grasping and pulling the stinger out. Given limits in the available data, it does not announced unsafe to scrape out the stinger. No data is bachelor to determine whether or non the rapid removal of the stinger would mitigate the risk of anaphylactic reaction in a sensitized individual.

Furthermore, our report'south initial questions regarding the removal method and the incidence of anaphylaxis, or the need for further treatment and intendance, take not been studied or published in the literature. Similarly, studies in children have non addressed these same questions.

Limitations

Despite the large burden of human morbidity from honey bee stings, the identifiable differences in outcome measures amongst varied stinger removal techniques have express the impetus for farther investigation. Subsequently, our work is express by the small number of studies investigating this bailiwick. Additionally, the ability to accurately quantify the volume of envenomation can exist difficult, even in a controlled research surroundings. Furthermore, both of the studies included in our review have their ain shortcomings and limitations. The Schumacher study is limited past its employ of non-human being models (rabbits and paper), which makes the findings difficult to use to honey bee envenomation in humans. The Visscher study was limited in size and likewise relied heavily on their apply of wheal size as an imprecise indicator of envenomation book. Both studies take significant risk-of-bias concerns; the Schumacher study did not report on a number of factors affecting bias and reported incomplete data, while the Visscher study includes significant confounders [ix,10]. Lastly, no identified literature is available on honey bee envenomation in children though differences in the child, adolescent, and adult physiology may affect both localized and systemic reactions.

Futurity research

The findings of our systematic review give ascent to several other clinical questions that are potential areas for future study. These include whether the rapidity of removal can ameliorate systemic allergic reactions, and if sure methods of stinger removal reduce or increase the breakage of the stinger or retentivity of strange body and the need for hereafter care. Furthermore, efforts to look at the differences between immature children, adolescents, and adults, and local and systemic reactions to dear bee envenomation would be of scientific and clinical value.

Conclusions

Available published inquiry on the method and speed of honey bee stinger removal is limited. Nonetheless, despite recommendations that bee stingers should be removed with a scraping irksome-edge approach, the all-time bachelor evidence, every bit presented hither, suggests that afterward a honey bee sting, a residual embedded stinger should be removed every bit chop-chop as possible. Given the time required to detect a dull-edged scraping device along with the evidence that grasping the stinger apparatus does not induce greater volume of envenomation, it would seem that it is advantageous to speedily remove the stinger past whatever ways possible; and this most often volition exist past grasping and pulling out a retained honey bee stinger.

Acknowledgments

We thank the medical library team at the University of Virginia for their assistance in performing the literature search for this review.

Appendices

Table 2

SYstematic Review Centre for Laboratory beast Experimentation (SYRCLE), risk of bias for Schumacher et al.

Written report	Schumacher et al. [ix]
Yr	1994
Design	Observational
Industry funding	None
Sequence generation	Unclear
Baseline characteristics	Unclear
Resource allotment concealment	No
Random housing	Unclear
Blinding of caregivers	Unclear
Random outcome assessment	Unclear
Blinding of issue assessor	Unclear
Incomplete data	Yeah
Selective outcome reporting	Yeah
Overall chance of bias	High/serious

Table 3

Risk Of Bias In Not-randomized Studies of Interventions (ROBINS-I), risk of bias for Visscher et al.

Study	Visscher et al. [x]
Year	1996
Design	Observational
Total patients	1
Population	Stings to the forearm of one patient multiple times with treatments randomized
Misreckoning	Serious
Selection of participants	Low
Nomenclature of interventions	Low
Divergence from intended intervention	Low
Missing data	Low
Measurement of outcomes	Low
Selection of reported result	Low
Overall run a risk of bias	Serious

Table 4

Grading of Recommendations Cess, Development and Evaluation (GRADE) for the studies meeting inclusion criteria

Certainty assessment							Certainty
Study	Study design	Adventure of bias	Inconsistency	Indirectness	Imprecision	Other considerations
Schumacher et al. [ix]	Animal Study	Serious	Non serious	Serious	Serious	None	Very Low
Visscher et al. [ten]	Observational	Serious	Not serious	Not serious	Serious	Only one researcher stung multiple times	Very Depression

Notes

The content published in Cureus is the result of clinical experience and/or research by independent individuals or organizations. Cureus is not responsible for the scientific accuracy or reliability of data or conclusions published herein. All content published within Cureus is intended but for educational, research and reference purposes. Additionally, manufactures published within Cureus should non be deemed a suitable substitute for the advice of a qualified wellness care professional. Do not condone or avoid professional medical communication due to content published within Cureus.

Footnotes

The initial literature search and the clinical question came out of the work by the American Crimson Cross Scientific Advisory Committee.

References

i. Bites and stings of medically important venomous arthropods. Vetter RS, Visscher PK. Int J Dermatol. 1998;37:481–496. [PubMed] [Google Scholar]

2. Occupational allergy to bumble bee venom. Kochuyt AM, Van Hoeyveld E, Stevens EA. Clin Exp Allergy. 1993;23:190–195. [PubMed] [Google Scholar]

3. Clinical practice. Hymenoptera-sting hypersensitivity. Casale TB, Burks AW. N Engl J Med. 2014;370:1432–1439. [PubMed] [Google Scholar]

four. Studies of 400 Hymenoptera sting deaths in the United States. Barnard JH. J Allergy Clin Immunol. 1973;52:259–264. [PubMed] [Google Scholar]

5. Snodgrass RE. Ithaca, NY: Cornell University Press; 1956. Anatomy of the Dearest Bee. [Google Scholar]

7. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. Moher D, Liberati A, Tetzlaff J, Altman DG. BMJ. 2009;339:0. [PMC free article] [PubMed] [Google Scholar]

nine. Rate and quantity of delivery of venom from honeybee stings. Schumacher MJ, Tveten MS, Egen NB. J Allergy Clin Immunol. 1994;93:831–835. [PubMed] [Google Scholar]

x. Removing bee stings. Visscher PK, Vetter RS, Camazine Due south. Lancet. 1996;348:301–302. [PubMed] [Google Scholar]

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Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7292703/

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